Cordosomatula, Gimmel & Leschen, 2022

Gimmel, Matthew L. & Leschen, Richard A. B., 2022, Revision of the genera of Picrotini (Coleoptera: Cryptophagidae: Cryptophaginae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 62 (1), pp. 61-109 : 78-79

Cordosomatula gen. nov.

( Figs 20 , 94 , 100 )

Type species. Cordosomatula magnabagishae sp. nov., by present designation.

Diagnosis. This genus is easily distinguished from other Picrotini by the body form, being somewhat pedunculate with a cordiform pronotum ( Fig. 20 ). In addition, it lacks a discrimen and has conspicuously undulate elytral vestiture. Other helpful characters include the long antennae with a club comprised of three antennomeres, conspicuously long tempora, lack of pronotal teeth or platforms, and free abdominal ventrites.

Description. Length 1.70–2.10 mm. Body form ( Fig. 20 ) stout, pedunculate, shining dorsally, with relatively long and sparse decumbent setae and with numerous very long, erect setae dorsally; cuticle weakly bicolored. Head with tempora prominent, more than 1/3 length of eye; vertex with temporal depression immediately anterior to ridge; band of reticulate sculpture absent. Frontoclypeus not projecting laterally; raised portion of frons between antennal insertions not constricted, about as wide as antennal club. Transverse ridge above antennal insertions absent. Eye small, conical, contacting antennal cavity; interfacetal setae absent. Antennal club consisting of 3 antennomeres; antenna inserted into small cavity; antennomere 9 subequal in width to antennomere 10. Mandible with apex bifid, subapical serrations present. Maxillary palpomere 4 distinctly longer than or subequal to 3; palpomere 4 not subulate. Gena without antennal groove; genal spines acute. Gular sutures incomplete, not reaching occipital foramen. Pronotum not explanate, narrower than elytra, constricted at base, widest just anterior of middle; anterior angles absent, not projecting anteriorly (not extending anterior to cervical foramen of prothorax), without distinct glandular surface or platform; lateral carina complete, smooth, lacking teeth, crenulations, or setigerous tubercles, with lateral glabrous space narrow, width of lateral bead wider than discal puncture and narrower than antennal funicle; disc with distinct transverse basal impression; paramedial carinae and paralateral plicae absent; posterolateral angles obtuse. Prothoracic hypomeron fused to prosternum. Prosternum with anterior margin on same plane as disc; prosternal process with lateral beads absent but with weak, paired, slightly convergent carinae near apex of process, grooved medially near apex, process slightly expanded apically, narrowly rounded and crenulate with minute setae; procoxal cavity with anterolateral notch. Scutellar shield clearly visible, transverse with small, obtuse apex. Elytron without humeral tooth; subbasal and subapical impressions absent; subapical gape present; punctation confused, dense and relatively weakly impressed; vestiture dual with numerous long, erect setae present on elytral disc, decumbent setae forming undulate pattern, with postscutellar and submedian setae directed laterally. Hind wing well developed. Mesoventrite with mesoventrital cavity bowl-like and flanked by sharp carinae. Mesanepisternal pit present, lined with setae. Metaventrite without postcoxal lines; discrimen virtually absent, posterior notch of metaventrite absent. Metendosternite with anterior tendons approximate. Tarsi 5-5- 5 in female, 5-5- 4 in male; tarsi slender, tarsomere 5 as wide as preceding tarsomeres in lateral view; pro- and mesotarsomere 4 with few ventral setae; mesotarsomere 3 weakly lobed, with few setae; mesotarsomeres 1–4 of subequal lengths, mesotarsomere 5 about as long as mesotarsomeres 1–4 combined.Abdominal ventrites free and without medial calli, lateral calli present, intersegmental crenulations present; ventrite 1 with intercoxal process broadly rounded, without postcoxal lines ( Fig. 94 ); mediobasal thickenings of ventrites 3–5 absent; apex of ventrite 5 lacking crenulations and midlateral lobe in male absent. Abdominal spiracles with opening on segment VII present and larger in diameter than spiracle VI, texture granulate and atrium rounded and saclike. Aedeagus ( Fig. 100 ) with tegminal strut weakly present, tegminal arms fused, without a suture; parameres separate and articulated to phallobase, inner surface not concave, length about 2× longer than wide (length taken from the inner bases); apices multisetose, lacking macrosetae; attachment point to phallobase not constricted, interparameral process absent; basipenis 3.5× longer than distipenis, with median carina; distipenis relatively long (about 2× longer than wide), outer rims smooth, lateral lobes not widely separated, symmetrical; internal sac without endophallites.

Etymology. The generic name is derived from a combination of the Latin “ cordis ”, meaning heart, and Greek “ somatos ”, meaning “of the body,” in reference to the vaguely heart-shaped prothorax. The gender is feminine.

Biology. The single species has been collected most frequently by pyrethrum fogging, flight intercept and Malaise traps, and stick brushing in rainforest habitats. A large series was collected a leathery white polypore fungus.

Distribution. Australia.

Included species (1). Cordosomatula magnabagishae sp. nov.

Figures

Figs 19–27. Habitus of species of Picrotini. 19 – Connatocryptus utiku sp. nov.; 20 – Cordosomatula magnabagishae sp. nov.; 21 – Cryptosomatula longicornis Bruce, 1940; 22 – Cryptothelypterus atomarioides (Grouvelle, 1919); 23 – Cryptothelypterus obrieni Leschen & Lawrence, 1991; 24 – Cryptothelypterus pteropilosus Leschen & Lawrence, 1991; 25 – Cryptothelypterus splendens (Bruce, 1940); 26 – Foveocryptus chenyandongi sp. nov.; 27 – Humerocryptus tumidus (Broun, 1893). Scale bars = 1 mm.

Figs 90–94. Ventral characters of Picrotini. 90 – prosternum, Notocryptus n. sp. 11. 91–92 – metaventrite.91 – Foveocryptus chenyandongi sp. nov.; 92 – Notocryptus n. sp. 12. 93–94 – basal abdominal ventrites. 93 – Austroscelis gibbipennis (Blackburn, 1891); 94 – Cordosomatula magnabagishae sp. nov.

Figs 98–103.Aedeagus, dorsal view. 98 – Austroscelis gibbipennis (Blackburn, 1892); 99 – Bellascelis pecki sp. nov.; 100 – Cordosomatula magnabagishae sp. nov.; 101 – Humerocryptus n. sp. 1; 102 – Notocryptus australis (Redtenbacher, 1868); 103 – Orthoscelis transversus sp. nov. Abbreviations: aet = anterior extension of tegmen; as = apical serrations; bk = basal kink of internal sac; ep = endophallites; ics = inner concave surface; ip = interparameral plate; lf = lateral fold; os = ostium; pg = primary gonopore.