Cerasommatidia rotundata COMB. NOV

CERASOMMATIDIA ROTUNDATA (PAKALUK & ŚLIPIŃSKI, 1990) COMB. NOV. Ibicarella rotundata Pakaluk & Ślipiński, 1990: 719. – Shockley et al., 2009: 28. Material examined: BRAZIL: Santa Catarina: Ibicare, 600 m, 27.09’ x 51.18’/ Sept. 1960, F. Plaumann, X.72/ Ibicarella rotundata sp. n., det. S. A. Ślipiński / Holotypus (ANIC). Diagnosis: Cerasommatidia rotundata can be distinguished from C. arroaei and C. plaumanni by its larger body size, the anterior pronotal margin with complete bordering line (vanished medially in other species of the genus); and the lateral margins of the elytra visible from above only for basal half length (for basal two-thirds in C. arroaei and C. plaumanni). Description: Body: length 1.70 mm, 1.3 times as long as wide, 1.2 times as long as high, short oval and moderately convex, black with dark-brown legs, antennae and palpi. Antenna nearly 0.35 of length of body; antennomeres 1–5 longer than wide; antennomeres 6, 7, 9 subquadrate and antennomere 8 slightly transverse. Apical labial palpomere short and rounded apically. Pronotum 3.0 times as wide as long. Anterior margin with complete bordering line. Pronotal sides narrowly bordered. Base not bordered. Prosternal process wide, with apex about 0.75 of width of procoxal cavity, narrowest near half-length, weakly widened apically, with lateral carinae raised, almost reaching apical quarter of prosternum, central part between carinae slightly depressed. Elytra 0.9 mm long, about as long a wide. Elytral lateral margins visible from above at basal half. Mesoventral process about 1.1 times as wide as mesocoxal diameter. Metaventrite with fine setiferous punctures. Legs. Meso- and metatrochanters flattened, weakly angulately produced posteriorly. Male genitalia. Unknown. Female genitalia. Not studied. Distribution: Brazil (Fig. 20B).
Published as part of Arriaga-Varela, Emmanuel, Tomaszewska, Wioletta, Szawaryn, Karol, Robertson, James, Seidel, Matthias, Ślipiński, Adam & Fikáček, Martin, 2023, The resurrection of Cerasommatidiidae, an enigmatic group of coccinelloid beetles (Coleoptera: Coccinelloidea) based on molecular and morphological evidence, pp. 1078-1115 in Zoological Journal of the Linnean Society 197 (4) on page 1092, DOI: 10.1093/zoolinnean/zlac082, http://zenodo.org/record/7814127
{"references":["Pakaluk J, Slipinski SA. 1990. Review of Eupsilobiinae (Coleoptera: Endomychidae) with descriptions of new genera and species from South America. ReVue Suisse de Zoologie 97: 705 - 728.","Shockley FW, Tomaszewska KW, McHugh JV. 2009. An annotated checklist of the handsome fungus beetles of the world (Coleoptera: Cucujoidea: Endomychidae). Zootaxa 1999: 1 - 113."]}