Two new species of Polana ( Hobemanella ) ( Hemiptera : Cicadellidae : Gyponini ) and key to species

Two new species of Polana (Hobemanella) Mckamey, 2006 are described and illustrated from Brazil: Polana (H.) alvarengai sp. nov., from the states of Mato Grosso, Rondônia and Pará, which can be recognized by the aedeagal shaft with subapical group of eight spine-like processes on each side of shaft, on ventral surface; and Polana (H.) arcana sp. nov., from the state of Paraná, which can be recognized by the aedeagus with pair of elongated processes arising at base, almost as long as shaft length and parallel to shaft. A key to the 19 known species of Polana (Hobemanella) is presented.

Polana was described by DeLong (1942) with Polana quadrinotata (Spångberg, 1878) as the type-species.Polana was characterized by DeLong and Freytag (1972) as follows: "small ovate brown species, 6 to 9 mm long, usually with few markings, with broad forewings that have few irregular reticulations.Crown short and broad, rounded to front.Ocelli about equidistant between eyes and median line and near anterior portion of crown".The subgenus Bohemanella was described by DeLong and Freytag (1972) to include Gypona bohemani Stål, 1864, designated as type-species, and 13 new species.However, McKamey (2006) renamed the subgenus Bohemanella as Hobemanella because the former was preoccupied.DeLong (1979a, b) described two new species, Polana luteonota and Polana putara, which were included in the subgenus.The last contribution on Hobemanella was made by DeLong (1984), with the description of a new species, Polana belema.
The subgenus was characterized by DeLong and Freytag (1972) as follows: "Head and crown as in the subgenus Polana.Male aedeagus greatly recurved, with a pair of parameres [here treated as atrial processes] arising from apex of phallobase.Pygofer with or without dorsal processes; when present, variable in structure".
In this paper two new species are described and a key to the 19 known species of Hobemanella is provided.One paratype male of P. (H.) alvarengai sp.nov., from Sinop, Mato Grosso, deposited at DZUP, is parasitized with Strepsiptera.The first record about parasitism by Strepsiptera in the tribe Gyponini was made by Remes- Lenicov and Tèson (1975)
Coloration.Head and thorax (Figs 1, 2) pale brown.Crown (Fig. 1) without maculae.Face (Fig. 3) without maculae.Pronotum (Fig. 1), in dorsal view, with small rounded black spot behind each eye at one-third length of disk; in lateral view (Fig. 2), proepimeron with narrow and elongated black macula just below pronotal carina.Mesonotum without maculae.Forewings (Figs 1, 2) pale brown with brown transversal stripe on apical third and five small black spots: one on base, near humeral angle; two on clavus, on apex of each anal vein; and two on corium, on each cross vein of discal cell.Legs pale brown.
Male terminalia.Sternite VIII (Fig. 4) approximately as wide as long; posterolateral corners rounded; posterior margin with middle portion strongly produced and rounded.Pygofer (Fig. 5) about 1.4 times longer than maximum height; macrosetae dispersed on posterodorsal quadrant; dorsal margin with short basal process; ventral margin rounded and with hair-like setae; posterodorsal margin straight and with small V-shaped notch at apex; posterior margin infolded.Subgenital plate (Figs 5, 6) short, in lateral view, produced posteriorly only as far as half length of pygofer; in ventral view, approximately 2.7 times longer than wide; maximum width at mid-portion; internal margin rounded; external margin rounded and with hair-like setae; apex rounded.Connective (Fig. 7) Y-shaped, with rami as long as stalk; stalk short and wider apically, approximately as long as wide.Style (Fig. 7), in dorsal view, with outer lobe reduced and truncated; in lateral view (Fig. 8), elongated, blade with same height along entire length, ventral margin not serrated, apical third slightly curved dorsally; apex with apical tip directed dorsally.Aedeagus (Figs 9, 10) with preatrium reduced; dorsal apodeme rounded, not developed laterally; atrial processes curved dorsally, not as long as shaft apex, in lateral view, wide near base and tapered toward apex, with lateral carina, apex acute; shaft curved dorsally near base, subapical group of eight spine-like processes on each side of shaft on ventral surface; apex flat and twisted to right side.
Remarks.Polana (H.) alvarengai sp.nov. is most similar to P. (H.) orbita by the very similar shape of style and the apex of aedeagal shaft recurved.However, it can be easily distinguished by the pygofer without internal processes (Fig. 5) and the aedeagal shaft with two subapical groups of eight spine-like processes (Figs 9,10).
Etymology.The new species name is an honor of Moacir Alvarenga, Major of the Brazilian Air Force, great collector of insects, whose inestimable material, collected on decades of 1950-1980 in areas which today are degraded, is still the basis for many scientific studies.Description.Male length 7.2-7.5 mm, female length 8.5-8.9 mm.Head (Fig. 17), in frontal view, with clypeus 1.1 times longer than wide, lateral margins slightly divergent apically, apex emarginated; frons approximately 1.2 times longer than wide; frontogenal suture distant from eye margin by distance two times wider than scape diameter.Head (Fig. 16), in lateral view, with clypeus not inflated and frons rounded.Forewing (Figs 15,16) with appendix narrower than maximum width of first apical cell.Foreleg with profemur, in frontal view, 3.1 times longer than high; AV row with four or five setae and PV rows with two or three setae.Other characteristics as in the previous description.
Coloration.Head and (Figs 15, 16) dark brown.Crown (Fig. 15) without maculae.Face (Fig. 17 Male terminalia.Sternite VIII (Fig. 15) approximately 1.3 times wider than long; posterolateral corners rounded; posterior margin with middle portion slightly produced and rounded.Pygofer (Fig. 19) about 1.6 times longer than maximum height; macrosetae dispersed on apical half; dorsal margin with short basal process; ventral margin rounded, without hair-like setae; posterodorsal and posteroventral margins almost straight and convergent apically; apex rounded.Subgenital plate (Figs 19,20) elongated, in lateral view, produced posteriorly almost as far as pygofer apex; in ventral view, approximately 3.3 times longer than wide; maximum width at mid-portion; internal margin rounded; external margin rounded and with short setae on apical half; apex rounded.Connective (Fig. 21) Y-shaped, with rami shorter than stalk; stalk elongated, narrow on base and wider apically, approximately three times longer than wide.Style (Fig. 21), in dorsal view, with outer lobe reduced and rounded, in lateral view (Fig. 22), elongated, blade with ventral margin produced near base and serrated, apex curved dorsally, narrow and rounded.Aedeagus (Figs 23,24) with preatrium reduced; dorsal apodeme short and rounded, not developed laterally; with atrial processes bent dorsally, as long as shaft, in lateral view, narrow near base and wider on apex, apex rounded; shaft with pair of elongated processes arising at base, with acute apex, almost as long as shaft length and parallel to shaft, shaft curved dorsally, apex rounded with two short lateral processes directed basally.Female terminalia.Sternite VII (Fig. 25) approximately 1.6 times wider than long; posterolateral angles rounded; posterior margin slightly excavated laterally of median rounded lobe, which occupies median third and is slightly more produced posteriorly than lateral angles.Pygofer (Fig. 26) about 1.8 times longer than maximum height, apex broadly rounded; macrosetae dispersed on dorsoapical fourth and ventroapical half.Internal sternite VIII membranous.First valvifer (Fig. 27) twice higher than long; external surface without setae.First valvulae (Fig. 27) slightly curved dorsally; basal portion developed anterad and with rounded lobe; apical third with dorsal sculptured area strigate; apex tapered abruptly and serrated laterally.Second valvulae (Fig. 28) with greatest height posterior to middle portion; dorsal margin roundly excavated near mid-length and without teeth; apical portion gradually tapering to acute apex.
Material examined.Holotype male: "Brasil, Paraná, S. Remarks.Polana (H.) arcana sp.nov. is similar to P. (H.) elabora, P. (H.) scela and P. (H.) alvarengai sp.nov. in having the pygofer without a conspicuous process as the one observed in the other species of Hobemanella.The new species is similar to P. (H.) bohemani, P. (H.) chelata and P. (H.) luteonota by the shape of style with ventral margin of blade higher near mid-portion and serrated, but differs by the ventral margin of blade higher more basally (Fig. 22) compared with the others.Polana (H.) arcana sp.nov.can be easily distinguished from other Hobemanella species by the presence of a pair of elongated processes arising at the base of aedeagal shaft (Figs 23,24).
Etymology.The species epithet, arcana, comes from the Latin "arcanum" and means mystery.This name was chosen because almost all specimens were collected with malaise trap; all attempts to collect this species by sweeping the vegetation around the traps have failed.The ten specimens collected by sweeping were obtained far away from the malaise trap, approximately 500 m from it.
) with frons brown, clypeus, lora and genae pale brown.Pronotum and mesonotum (Figs 15, 16) without maculae.Forewings (Figs 15, 16) dark brown with veins yellowish on apical portion; five black spots: one on base, near humeral angle; two on clavus, on apex of each anal vein; and two on corium, on each cross vein of discal cell.Legs pale brown; metatibiae with cucullate bases of macrosetae black.
with Membracixenos placula Ball, 1975 on Curtara pagina DeLong & Freytag, 1976, and now this is the first record in Polana.