Review of Coeliaria ( Coleoptera : Coccinellidae : Chnoodini )

Coeliaria Mulsant, 1850 is revised based on the external morphology and genitalia of the adults and is distinguished from the other Chnoodini by the following characters: dorsal surface pubescent; antenna 11-segmented; hypomera with rounded fovea; tibia flat and angulated; abdominal postcoxal line incomplete, recurved and with oblique line. A new species, Coeliaria castanea sp. nov., from Brazil, and two new combinations, are proposed: Coeliaria bernardinensis comb. nov. and C. luteicornis comb. nov., expanding the distribution of the genus to Bolivia and Paraguay.


INTRODUCTION
Coccinellidae Latreille, 1807 is an ecologically and morphologically diverse group of predators that are often used in biological control programs of insect pests (Hodek and Honěk 1996).
The Brazilian species of Exoplectra were reviewed by Costa et al. (2008), who provisionally removed E. bernardinensis and E. luteicornis from the genus.
In this paper, Coeliaria is revised based on its external morphology and genitalia.One new species from Brazil and two new combinations are proposed, expanding the size and distribution records of the genus.Parts that were dissected from specimens (mouthparts, antennae, legs, abdomen and genitalia) were stored in microvials with glycerin.The microvials were pinned together with the respective specimen.Photographs were taken using a Sony Cyber-shot (DSC-W300) digital camera coupled to a Zeiss Stemi SV6 compound stereomicroscope and a Zeiss Stereo Discovery Standard 20 microscope.

The
The terminology used in the descriptions follows Costa et al. (2008) and Krüger et al. (2016).
The labels of the type material are arranged in sequence from top to bottom, with the data for each label within double quotes (" "); slashes (/) separate the rows, and the information between brackets ([]) provides additional details recorded on the labels.Diagnosis.Coeliaria is a Neotropical genus that resembles Exoplectra Mulsant, 1850, andGordonita González, 2013, by the angulation of the tibia.Coeliaria is distinguished from Exoplectra by the presence of a fovea in the hypomera; pronotum with the inner angles more prominent and emarginated.In Gordonita, the fovea of the hypomera is small and deep; the body is elongated and depressed.Coeliaria is distinguished from the other genera of Chnoodini by the following combination of characters: Body black or dark, without spots; dorsal surface pubescent; antenna 11-segmented; labrum truncated; hypomera with rounded fovea; tibia flat and angulated; abdomen with five visible sternites (females) or six sternites (males); abdominal postcoxal line incomplete, recurved, oblique line present.
Male genitalia.Tegmen with penis guide and symmetrical parameres; penis slender, with developed penis capsule.
Type material.It was only possible to examine photographs of the syntype (Figs 24-28) deposited in the Musée des Confluences, Lyon, France (MHNL).In 1970, R.D. Gordon indicated, on a label, that the specimen as the Lectotype, but this designation was not published.Here we designate this specimen as the Lectotype.
Remarks.Coeliaria erythrogaster, first described in Exoplectra, was characterized by presenting a fovea in the hypomera, differentiating it from all other species of Exoplectra.Since then it was considered the only species of Coeliaria.In addition to this character, C. erythrogaster has strongly expanded elytra, pubescence very dense and uniform, and is larger than the other species of the genus.
Biological data.Costa Lima (1950) published a report of the metamorphosis of C. erythrogaster larvae, and mentioned that it was covered by abundant waxy secretions.Mariconi andZamith (1959, 1960) described the larvae and adult, as well as biological aspects of E. erythrogaster preying on Mimosicerya hempeli (Cockerell, 1899) (Hemiptera: Margarodidae) on the plant Cassia fistula Linnaeus (Fabaceae) in Piracicaba, São Paulo, Brazil.In their description of the adult they mentioned various bare areas, apparently with shorter and thinner pubescence.This description is consistent with Crotch (1874), who mentioned that recently collected specimens have gray pubescence, giving the impression of bare spots, which is very peculiar.According to those authors, the larvae are completely covered by white secretions that form a mass of conspicuous flaky wax, which extends 30 to 35 mm in length.
Etymology.The species epithet, castanea, is a reference to the color pattern of this species.
Remarks.Coeliaria castanea sp.nov.resembles C. erythrogaster by having very conspicuous, deep and rounded fovea, but differs in the brownish color and by the shape of the female genitalia.
Figure 55.Map showing the known geographical distribution of the species of Coeliaria.