Six new species of the widespread Brazilian millipede genus Eucampesmella (Polydesmida: Chelodesmidae)

This study concerns the diplopod genus Eucampesmella Schubart, 1955, widespread in Brazil. After this work, the genus includes 12 valid species, and three incertae sedis: E. pugiuncula (Schubart, 1946), E. brunnea Kraus, 1959 and E. schubarti Kraus, 1957. The type-species, Eucampesmella tricuspis (Attems, 1931), is redescribed based on the holotype, and the following six new Brazilian species are added: Eucampesmella macunaima sp. nov. from the states of Rondônia, Pará, and Piauí; E. capitu sp. nov. from the states of Piauí and Paraíba; E. brascubas sp. nov. from the state of Sergipe; E. iracema sp. nov. from the state of Pernambuco; E. pedrobala sp. nov. from the state of Ceará; and E. lalla sp. nov. from the state of Rio Grande do Norte. Furthermore, E. lartiguei ferrii (Schubart, 1956) is recognized as a junior synonym of E. lartiguei lartiguei (Silvestri, 1897), which also had its status changed, and E. sulcata (Attems, 1898) is revalidated, prevailing under the name Leptodesmus tuberculiporus Attems, 1898. In addition, drawings, diagnoses, and distribution maps for all species of the genus are provided.


INTRODUCTION
The Chelodesmidae is one of the most diverse families of Diplopoda in the Neotropics, with almost 800 described species (Hoffman 1980, Enghoff et al. 2015. Although the variations in the male copulatory organs are traditionally used for species delineation in Chelodesmidae (Pena- , the female genitalia has been historically neglected, with only a few published studies mentioning these structures (Hoffman 1990a(Hoffman , 1990b(Hoffman , 2000. Overall, it is not clear if females have been neglected because they lack diagnostic characters or because traditional millipede taxonomy has focused on gonopod characters (Ah-King et al. 2014, Zahnle et al. 2020. The male copulatory organs, the gonopods, are well-exposed and easily recognized, while the female organs are commonly hidden inside the body.
Eucampesmella Schubart, 1955 comprises millipedes that are widespread throughout the North and Northeast regions of Brazil. The included species occur in the following terrestrial biomes: Caatinga, Atlantic Forest and Amazonian Rainforest (Hoffman 1967). Some species also have been reported from human-impacted environments (Schubart 1948, Golovatch and Hoffman

MATERIAL AND METHODS
The examined specimens are deposited in the following collections ( Hoffman, 1990 Eucampesmella Schubart, 1955Eucampesmella Schubart, 1955Hoffman, 1967: 185;Golovatch and Hoffman, 2004: 51. Type-species: Pseudoleptodesmus tricuspis Attems, 1931, by original designation. Diagnosis. Males of Eucampesmella differ from all other genera of the Chelodesmidae by the massive and prominent gonocoxa (Fig. 16); prefemoral region basally separated (= basal constriction Hoffman, 1967) from the acropodite region (Figs 17,18,arrows); by having a well-developed prefemoral process with a secondary process (Fig. 15), varying in shape and position among the species of the genus; a well-developed shield-shaped process in the acropodite region covering the solenomere (Figs 15,16). Females of Eucampesmella differ from all other genera of Chelodesmidae by having vulvae elongated and slender (Fig. 21); small operculum ; and the posterior margin of vulvae opening with large epigyne (Fig. 20, arrow), except for Eucampesmella brascubas sp. nov. and E. lalla sp. nov. with an epigyne half as long.
Description. General characters: body length between 40 mm (Eucampesmella tricuspis) and 63 mm (E. lalla sp. nov). Coloration: living specimens black with tip of paranota yellow (Fig. 2); animals preserved in 70% ethanol range from black to reddish and brown, with paranota whitish . Head: smooth, with three pairs of setae between the antennae (row 0, 1 and 2), more setose near the mouth parts (Fig. 5). Gnathochilarium: without modifications as observed in other Chelodesmidae, but covered by short and thick setae (Fig. 9). Incisura lateralis rounded (Fig. 6). Antennae: seventh antennomere having two well-demarcated invaginations and two slight invaginations of the exoskeleton between the sensory cones; modified setae arranged into two small groups; very small setae on the ectal side of the antepenultimate antennomere (Figs 7,8). Some species with the last antennomere yellow. Body ring: cuticle slightly rough, without projections, tubercles or setae (Fig. 11). Collum: anterior border arched and posterior border straight, without modifications; corners rounded. Stigma oval, almost flat (Fig. 12). Sternites: 4 th body ring with a pair of projections, the 5 th body ring with two or one pair of projections, 6 th and 7 th body rings with a pair of processes in some species. Ozopore arrangement 5,7,9,10,12,13,[15][16][17][18][19] (following the normal polydesmidan pore formula); ozopores surrounded by a peritremata and with a slightly pronounced rounded rim (Fig. 11). Paranota: prominent rounded, without projections (Fig. 11). Legs: anterior legs with ventral setae more dense than the dorsal setae (Fig. 10); anterior legs also more setose, when compared to posterior legs; presence of a pronounced dorsal lobe on the prefemur and in some species granules on the tibia. Telson: triangular, with five pairs of macrosetae on the dorsal sides and two pairs on the apical region.
Male characters. Gonopore: coxae of second pair of legs with a subrectangular shape, bearing a ventral pore (= genital papilla). Gonopod aperture on body ring 7: elliptical, with a sclerotized gonopod support base and with posterior margin excavated; folds at the lateral sides of posterior border (Fig. 13). Posterior border prominent ventrally developed in some species (Fig. 14). Gonopods: well-developed, with massive gonocoxae (Figs 16,17). The gonocoxae protrude laterally so much that the prefemur is largely obscured. Cannula robust and hook-shaped (Figs 15,18 containing a secondary projection, varying in shape, position and length (Fig. 15); solenomere protected by shield-shape process at the acropodite region (Figs 15,16).
Female characters. posterior margin of vulvae opening presenting an epigyne, in most of the species this structure is well-developed (Fig. 20, arrow). Vulvae: easily observable, protruding out of the body (Fig. 19); situated directly behind second pair of legs of third body ring; long and well developed (Figs 21,22), composed of three valves, all densely setose (Fig. 24); internal (IV) and external (EV) valves joined by an intermediate membrane (Figs 21,22), with a proximal and small operculum adpressed against both larger valves (Op, Figs 21−23).
Distribution. Known from the Brazilian states of Amapá to Bahia, occurring in the Caatinga, Atlantic Forest, and Amazonian Rainforest (Figs 66, 67).
Redescription. Male (Holotype, NHMW). Total length 40, width 6.6. Coloration (long-preserved in 70% ethanol): Head light brown; with three pairs of setae between the antennae (row 0, 1 and 2); clypeus with few random setae. Antennae light brown to brownish. Body brown and paranota tip whitish (Figs 25−27). Body rings: cuticle rough; paranota with posterior edges rounded; ozopore posteriorly situated on paranota. Stigma oval, almost flat. Sternite of body ring 4 with a pair of projections; Sternite of body ring 5 with two pairs of setose projections, the anterior are place together and are more conspicuous, the posterior are placed far apart. Sternite of body ring 6 without projections, but the anterior zone between the coxae has a cluster of setae. Post-gonopodal sternites without setae and with low projections next to each coxae. Gonopod aperture on body ring 7 elliptical, posterior edge with prominent folds; in anal view the posterior  broken. Telopodite with the main branch of the prefemoral process and both branches of the acropodite equally long [prefemoral process the same size of the acropodite], slender straight spikes, parallel to each other. Prefemoral process with a second smaller branch, curved mesad (Fig. 29). Acropodital process enlarged, with some indentations in the apical margin (Fig. 29); solenomere long and slender (Fig. 29).
Remarks. The type-material from NHMW is partially in good conditions, with body intact and well-preserved. However, the gonopods slides are broken and further details are impossible to extract (Fig. 28).
Distribution. Brazil, without specific locality.
Eucampesmella sulcata (Attems, 1898), stat. rev. Diagnosis. Males of Eucampesmella sulcata stat. rev. differ from all other species of Eucampesmella by the presence of a slender and long solenomere (similar to E. tricuspis, but differing by acropodital process being divided into two branches in the apical portion); internal branch of the process of the acropodite subrectangular in shape in ectal view (Fig. 31). The prefemoral process of E. sulcata stat. rev. similar to males of E. expansa by having elongated and slender secondary process (Fig. 30); but differing from E. expansa by absence of rounded projection on the tip of the prefemoral process and also its length (overreaching the acropodite in E. expansa).
Distribution. Known only from Bahia state. Remarks. The epithet name tuberculipora was given priority by Hoffman (1967) over sulcatus (for more details, Hoffman 1967: 183-185). However, the prevalence of tuberculipora is in disagreement with the reversal of precedence (ICZN, article 23.9.). The supposed junior synonym (in this case, tuberculipora) has not been used in at least 25 published works by at least 10 authors (see condition 23.9.1.2.). Based on this, herein we suggest the maintenance of sulcatus (in concordance with feminine gender, Eucampesmella sulcata).
Eucampesmella lartiguei (Silvestri, 1897) Diagnosis. Males of Eucampesmella lartiguei differ from all other species of the genus by having an apical fold on the prefemoral process, in mesal and ventral view; by the short process at the prefemoral process, at the middle and ventrally pointed, in mesal and ventral view (Figs 32,33). This process is also observed in E. brascubas sp. nov., but differing by the size, being longer and pointed anteriorly in E. brascubas sp. nov.
Additional Distribution. Holotype labeled only as "Pernambuco", without exact locality; also known in states of Ceará, Rio Grande do Norte, and Alagoas (Fig. 66).
Justification of synonymy. The original description made by Schubart (1956) for Leptodesmus lartiguei ferrii was based on single male (45 mm length, 7.6 mm wide). Schubart also noted that the species agrees with Leptodesmus lartiguei (Silvestri, 1897) in all somatic characters. Through the examination of the type material Eucampesmella l. ferri and analysis of the original work and drawings of Eucampesmella l. lartiguei provided by Silvestri (1897), as well as the accurate exam of several specimens identified by Otto Schubart, we concluded that the males of both nominal species present complete agreement when considering the body shape and the morphology of the gonopod. A slight difference in the form of the acropodital apex is here treated as just an intraspecific variation. Therefore, it is proposed herein E. lartiguei ferrii as a junior synonym of E. lartiguei lartiguei.
Remarks. The type-locality of Leptodesmus lartiguei ferrii was originally cited as Alto Bonito in the South of Cachoeira de Paulo Afonso (Paulo Afonso Falls), municipality of Glória, Bahia state Six new species of Eucampesmella ZOOLOGIA 38: e66300 | https://doi.org/10.3897/zoologia.38.e66300 | July 12, 2021 (Schubart 1956: 423). After checking local gazetteers, we found that Alto Bonito refers to an area belonging to the municipality of Delmiro Gouveia, Alagoas, and not in Bahia, as referred in the original description. It is important to note that Paulo Afonso Falls is located in Paulo Afonso, currently a municipality in Bahia. This region is located at the border of the states of Bahia and Alagoas, surrounding by the Paulo Afonso Hydroelectric Complex, a system of dams and power plants on the São Francisco River.
Eucampesmella expansa (Brölemann, 1903)  Distribution. Only known for states of Pernambuco and Bahia (Fig. 66). Eucampesmella serrana (Attems, 1944)  Diagnosis. Males of Eucampesmella serrana differ from all other species of the genus by the basal branch in prefemoral process reaching half the size of the process (Figs 40, 41); presence of small second branch on prefemoral process (Figs  40, 41).
Distribution. Only known for the type-locality (Fig. 66).
Eucampesmella janetae Golovatch & Hoffman, 2004 Fig. 66 Eucampesmella janetae Golovatch and Hoffman, 2004 Diagnosis. Males of Eucampesmella janetae differ from all other species of the genus by having the terminal telopodite structures (prefemoral process and acropodite) divided into two branches in the middle of both processes, which results in four branches of almost equal length. Distribution. Known from states of Amapá and Ceará (Fig. 66).
Remarks. A recent, complete and well-detailed description is available in Golovatch and Hoffman (2004).
Eucampesmella macunaima sp. nov.  : coxae equivalent to about half the length of the telopodite and prominent rectangular in ectal view (Fig. 44). Coxae with a row of macrosetae on the dorsal side. Cannula: hook-shaped. Prefemoral region ventrally developed, about 1/3 length of telopodite; ending in a well-demarcated transition zone (Fig. 44). Prefemoral process long and slender; apex slightly broad divided into two small acute tips; a thin secondary process arises in the medial-basal portion, not surpassing the length of the prefemoral process (PfP; Figs 42, 43). Acropodite elongated, robust and broad; apical portion divided into two large branches: the internal one (=solenomere) conducting the prostatic groove that opens on a small sharp projection in the apex of this branch (S; Figs 42, 44). Acropodital process (AP) covering the solenomere (S) in ventral view, spoon shaped (Fig. 43).
Etymology. The species epithet is a reference to the Brazilian literature character "Macunaíma" from the book "Macunaíma: O herói sem nenhum caráter" written by Mário de Andrade. Noun in apposition.
Eucampesmella capitu sp. nov. Diagnosis. Males of Eucampesmella capitu sp. nov. differ from all other species of the genus by the apical portion of prefemoral process divided (Figs 45, 47), similar to E. pedrobala sp. nov., but with anterior branch longer than the posterior, while in E. pedrobala sp. nov. the two branches have the same length (Fig. 45) Description. Male (Holotype, MNRJ 11959). Coloration (long-preserved in 70% ethanol): Head brownish. Antennae white yellow. Body brown and paranota tip whitish. Legs brownish. Body rings: cuticle rough, with a pattern of slightly raised squares; paranota with posterior edges rounded; ozopore posteriorly situated on paranota. Stigma oval. Sternite of body ring 4 with one pair of projections; Sternite of body ring 5 with two pairs of projections, the former ones are rectangular and the latter ones are triangular; Sternite of body ring 6 with an anterior pair of triangular projections. Pair of legs on body ring 3 with coxae possessing a rectangular-shaped genital papilla, and pairs of legs on body rings 5 to 17 with two pairs of slightly triangular projections between coxae. Gonopod aperture on body ring 7 elliptical, posterior edge with prominent folds, in anal view the posterior margin without any projection. Legs brownish, with a dorsal lobe in the prefemur. Telson brown with the posterior margin whitish. Gonopods : coxae equivalent to about the length of the telopodite and prominent digitiform (= rectangular, with rounded corners) in ectal view (Fig. 47). Coxae with a row of macrosetae on the dorsal side. Cannula: hook-shaped. Prefemoral region ventrally developed, about 1/3 length of telopodite; Six new species of Eucampesmella ending in a well-demarcated transition zone. Prefemoral process long; broad, in dorsal view, except for the terminal branch; a thin and small secondary process arises in the medial portion (PfP;Figs 45,46). Acropodite elongated, robust and broad; apical portion divided into two large branches: solenomere conducting the prostatic groove that opens on a small sharp projection in the apex of this branch (S; Fig. 47). Acropodital process (AP) subtriangular shaped in ventral view (Fig. 46). Female. Unknown. Additional material examined. BRAZIL: Piauí: Serra da Capivara (8°46'39"S; 42°37'03"W), 1 male, 10.ii-03.iii.2013, R.S. Recoder coll. (IBSP 3750).
Etymology. The species epithet is a reference to the Brazilian literature character "Capitu" from the book "Dom Casmurro" written by Machado de Assis. Noun in apposition.
Eucampesmella brascubas sp. nov. Diagnosis. Males of Eucampesmella brascubas sp. nov. differ from all other species of the genus by the apical portion of the prefemoral process with a small lateral process near the acuminate apex (Fig. 48). Acropodite with apical portion similar to E. macunaima sp. nov., but with solenomere broader (Fig. 48).
Description. Male (Holotype, MZSP 1155). Coloration (long-preserved in 70% ethanol): Head light brown. Antennae brownish. Body light brown and paranota tip slightly yellowish. Legs brownish. Body rings: cuticle rough, forming a pattern of smooth square shapes; paranota with posterior edges rounded; ozopore central-posteriorly situated on paranota. Stigma oval. Sternite of body ring 4 with one pair of projections; Sternite of body ring 5 with two pairs of projections, the former ones are digitiform and bigger, and the latter ones are smaller and triangular; Sternite of body ring 6 without projections; Sternite of body ring 8 with two pairs of rounded projections. Pair of legs on body ring 3 with coxae possessing a rectangular-shaped genital papilla. Gonopod aperture on body ring 7 elliptical, posterior edge with prominent folds, in anal view the posterior margin has a rounded projecting edge. Legs brownish, with a dorsal lobe on the prefemur. Telson brown with the posterior margin slightly yellowish. Gonopods : coxae equivalent to about the length of the telopodite and prominent digitiform (= rectangular, with rounded corners) in ectal view (Fig. 50). Coxae with a row of macrosetae on the dorsal side. Cannula: hook-shaped. Prefemoral region ventrally developed, about 1/3 length of telopodite; ending in a well-demarcated transition zone. Prefemoral process long; broad, in dorsal view, except for the terminal part; with two terminal branches, the proximal one broad and leaf shaped and the apical one slightly curved and slender; a slender secondary process arises in the medial portion (PfP; Figs 48, 49). Acropodite elongated, robust and broad; apical portion divided into two large branches: spoon-shaped solenomere conducting the prostatic groove that opens on small projected sharp, clearly demarcated from the middle portion of the branch and terminating just near the apex. (S; Fig. 48). Acropodital process (AP) triangular shaped in ventral view (Fig. 49).
Female (paratype, IBSP 3635). Coloration as in male. Posterior margin of vulvae opening with a small rounded epigyne. Vulvae (Figs 51, 52)  Distribution. Only known for the type locality (Fig. 67). Etymology. The species epithet is a reference to the Brazilian literature character "Brás Cubas" from the book "Memórias Póstumas de Brás Cubas" written by Machado de Assis. Noun in apposition.
Eucampesmella iracema sp. nov. Diagnosis. Males of Eucampesmella iracema sp. nov. differ from all other species of the genus by the prefemoral process containing two robust branches, one located on anterior position, other positioned apically (Fig. 53). Acropodite broad, apically divided into two small but robust branches (S and AP; Figs 53, 55).
Description. Male (Holotype, MNRJ 11648). Coloration (long-preserved in 70% ethanol): Head brownish. Antennae white yellow. Body brown and paranota tip whitish. Legs brown-ish. Body rings: cuticle rough; paranota with posterior edges rounded; ozopore posteriorly situated on paranota. Stigma oval. Sternite of body ring 4 with one pair of projections; Sternite of body ring 5 with two pairs of projections, the former ones are rectangular and the latter ones are triangular; Sternite of body ring 6 without projections but the anterior zone between the coxae have a cluster of setae. Pair of legs on body ring 3 with coxae possessing a rectangular-shaped genital papilla, and pairs of legs on body rings 5 to 17 with two pairs of slightly triangular projections between coxae. Gonopod aperture on body ring 7 elliptical, posterior edge with prominent folds, in anal view the posterior margin is rounded projected. Legs brownish, with a dorsal lobe in the prefemur. Telson brown with the posterior margin whitish. : coxae equivalent to about the length of the telopodite and prominent digitiform (= rectangular, rounded in the corners) in ectal view (Fig. 55). Coxae with a row of macrosetae on the dorsal side. Cannula: hook-shaped. Prefemoral region ventrally developed, about 1/3 length of telopodite; ending in a well-demarcated transition zone. Prefemoral process long, but not exceeding the acropodite; robust and broad, in dorsal view, except for the terminal branch that is internally curved; an internally curved secondary process arises in the medial portion (PfP; Figs 53, 54). Acropodite elongated, robust and broad; solenomere conducting the prostatic groove that opens on a small sharp projection in the apex of this branch (S; Figs 53−55); Acropodital process rounded and shield shaped, in ventral view (AP; Figs 53−55).
Female. Unknown. Distribution. Only known for the type locality (Fig. 67).
Etymology. The species epithet is a reference to the Brazilian literature character "Iracema" from the book "Iracema" written by José de Alencar. Noun in apposition.
Eucampesmella pedrobala sp. nov. Diagnosis. Males of Eucampesmella pedrobala sp. nov. differ from all other species of the genus by the apical portion of prefemoral process divided into two branches (Figs 56, 57), similar to E. capitu sp. nov. but with the same length, while in E. capitu sp. nov. the anterior branch is longer than the posterior. Apex of the solenomere small and rounded (Fig. 56). Acropodital process with irregular edges (Figs 57, 58).
Description. Male (Holotype, MNRJ 11606). Coloration (long-preserved in 70% ethanol): Head brownish. Antennae white yellow. Body brown and paranota tip whitish. Legs brownish. Body rings: cuticle rough; paranota with posterior edges rounded; ozopore posteriorly situated on paranota. Stigma oval. Sternite of body ring 4 with one pair of projections; Sternite of body ring 5 with two pairs of projections, the former ones are rectangular and the latter ones are triangular; Sternite of body ring 6 with one anterior pair of triangular projections. Pair of legs on body ring 3 with coxae possessing a rectangular-shaped genital papilla, and pairs of legs on body rings 5 to 17 with two pairs of slightly triangular projections between coxae. Gonopod aperture on body ring 7 elliptical, posterior edge with prominent folds, in anal view the posterior margin has a triangular projection. Legs brownish, with a dorsal lobe in the prefemur. Telson with the same color as the body. Gonopods : coxae equivalent to about half the length of the telopodite and prominent rectangular, in ectal view (Fig. 58). Coxae with a row of macrosetae on the dorsal side. Cannula: hook-shaped. Prefemoral region ventrally developed, about 1/3 length of telopodite; ending in a well-demarcated transition zone. Prefemoral process long; two terminal branches thin and slender, the proximal one slightly angulated and the apical one straight; a long and slender secondary process arises in the medial-basal portion, with almost the same length of the prefemoral process (PfP; Fig. 56). Acropodite elongated, robust and broad; Solenomere conducting the prostatic groove that opens on a small sharp projection in a small rounded apex (S; Fig, 56); Acropodital process with subtriangular shaped, with irregular edges, in ventral view (AP; Fig. 58).
Female (Paratype, MNRJ 30173). Coloration as in male. Posterior margin of vulvae opening with a large triangular-shaped epigyne. Vulvae (Fig. 59)  Distribution. Only know for the type locality (Fig. 67). Etymology. The species epithet is a reference to the Brazilian literature character "Pedro Bala" from the book "Capitães da Areia" written by Jorge Amado. Noun in apposition.
Eucampesmella lalla sp. nov. Diagnosis. Males of Eucampesmella lalla sp. nov. differ from all other species of the genus by the prefemoral process with a small lateral spine on the middle region of the process (Figs 61, 62). Just above the median region of the prefemoral process, on the inner margin, there is an irregular zone with some indentations (Fig. 61).
Description. Male (Holotype, IBSP 1378). Coloration (long-preserved in 70% ethanol): Head ocher. Antennae yellow-ish white. Body brown and paranota tip yellowish. Body rings: cuticle rough; paranota rounded; ozopore central-posteriorly situated on paranota; peritremata slightly pronounced on the paranota. Stigma oval. Sternite of body ring 4 with one pair of projections; Sternite of body ring 5 with two pairs of projections, the former ones are larger and rounded-shaped, the latter ones are triangular; Sternite of body ring 6 with two pairs of small triangular projections in the base of the coxae; post-gonopodal sternites with two pairs triangular projections; Sternite until the body ring 9 with the anterior zone between the coxae showing a cluster of small setae. Pair of legs on body ring 3 with coxae possessing a rectangular-shaped genital papilla. Gonopod aperture on body ring 7 elliptical, posterior edge with prominent folds, in anal view the posterior projecting margin is rounded. Legs yellowish, with a dorsal lobe on the prefemur and tibia, some legs with granules. Telson brown with the posterior margin whitish. : coxae equivalent to about the length of the telopodite and prominent digitiform (= rectangular, with rounded corners) in ectal view (Fig. 63). Coxae with a row of macrosetae on the dorsal side. Cannula: hook-shaped. Prefemoral region ventrally developed, about 1/3 length of the telopodite; ending in a well-demarcated transition zone. Prefemoral process long, slightly exceeding the length of the acropodite; broad, in dorsal view; indentation border is present in the sub-apical portion on the external margin of the process; a small spine-shaped secondary process arises in the medial portion (PfP; Figs 61, 62). Acropodite elongated, robust and broad; apical portion divided; Solenomere conducting the prostatic groove that opens on a conspicuous acute projection; solenomere robust and rounded shaped (S; Figs 61−63); Acropodital process more slender than the solenomere, sub-oval in ventral view (AP; Figs 61−63). Female (Paratype, IBSP 1378). Head and body dark brown, paranota tip yellowish. Posterior margin of vulvae opening presenting a small dome-shaped epigyne. Vulvae (Fig. 64) elongated; not straight (=curved to the external side; "C-shaped"). Total length: 63.14. Width total: 9.28. Posterior margin of the vulvae aperture: 2, 93 width. Vulvae: long 1.93, width 1.15. External valve: long 1.91, width 0.86. Internal valve: long 1.49, width 0.69. Operculum: long 0.28, width 0.46. Latero-posterior margin of the both valves with long setae and densely setose, central setae shorter and scattered; a depression occurs along all the central portion of both valves (Fig. 65). Operculum small (OP , Figs 64, 65).
Distribution. Only known for the type locality (Fig. 67).
Etymology. The species epithet is taken as a noun in apposition honoring the chilopodologist Laura Del Latte, nicknamed "Lalla", for her contributions to science and a very important person in life for the third author.
Distribution. State of Amazonas, Brazil.

Six new species of Eucampesmella
Remarks. The species is not a member of the genus due to the following features: solenomere and acropodital process divided at the base of the acropodital region; prefemoral process small and slender, without a secondary projection. Additionally, E. schubarti was not mentioned in the list of species of the genus (see Hoffman 1967).
Distribution. Peru. Kraus, 1959 Eucampesmella brunnea Kraus, 1959: 196 Remarks. The species is not a member of the genus due to the following features: solenomere and acropodital process divided at the base of the acropodital region; prefemoral process small and slender, without a secondary projection. Additionally, E. brunnea was not mentioned in the list of species of the genus (see Hoffman 1967).

DISCUSSION
The female genitalia of Chelodesmidae had not been taken into consideration in systematic contributions on diplopods. The absence of complex branches and processes in the different parts of the vulvae and the "simple" design of the female genitalia seem to suggest, at first, that it does not provide diagnostic characters. The easy access to species-specific genital characters in males (e.g. gonopod) reinforced the trend to ignore the vulvae in taxonomic treatments (Hoffman 1967).
Even though some Chelodesmid species have been described based solely on female specimens, these species present strongly conspicuous somatic characters (for instance, color pattern on body rings; shape of paranota) (e.g. Schubart 1945Schubart , 1960. Importantly, descriptions based only on female material are not recommended, since the taxonomy of the family is mostly based on the morphology of the gonopod. Nevertheless, characters from vulvae have been used in previous cladistic