Odontosomatula, 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 : 90-91

Odontosomatula gen. nov.

( Figs 50, 51 , 78 )

Type species. Odontosomatula carltoni sp. nov., by present designation.

Diagnosis. This genus is easily distinguished from all other picrotines by the presence of sharp, asetose teeth along the lateral carina of the pronotum, easily visible in dorsal view ( Fig. 78 ). Additionally, the antennal club is composed of three antennomeres, the pronotum has a lateral glabrous space and lacks platforms, and the abdominal ventrites are free.

Description. Length 1.60–2.20 mm. Body form ( Figs 50, 51 ) elongate, fusiform, prothorax quadrate, distinctly narrower than elytra, shining dorsally, with moderately dense decumbent setae and with (undescribed species from New Zealand) or without ( O. carltoni ) sparse suberect to erect setae dorsally; unicolorous to weakly bicolored. Head with tempora present, less than onefourth ( O. carltoni ) to one-third (undescribed species from New Zealand) length of eye; vertex with temporal depression present immediately anterior to ridge; band of reticulate sculpture present ( O. carltoni ) or absent. Frontoclypeus not projecting laterally; raised portion of frons between antennal insertions not constricted, about as wide or wider than antennal club. Transverse ridge above antennal insertions absent. Eye large, rounded, contacting antennal cavity; interfacetal setae present. Antennal club consisting of 3 antennomeres; antenna inserted into small cavity; antennomere 9 subequal in width to antennomere 10. Mandible with apex bifid. Maxillary palpomere 4 slightly longer than 3; palpomere 4 not subulate. Gena without antennal groove; genal spines sharply acute, prominent. Gular sutures incomplete, not reaching occipital foramen. Pronotum not explanate and not constricted at base, distinctly narrower than elytra, widest at middle; anterior angles feebly extending anterior to cervical foramen of prothorax ( O. carltoni ) or not (undescribed species from New Zealand), without a distinct flat glandular surface or platform; lateral carina present and complete, with several prominent teeth ( O. carltoni ; Fig. 78 ) or one large tooth (undescribed species from New Zealand), lacking crenulations or setigerous tubercles, with lateral glabrous space present, width of lateral bead about as wide as antennal funicle; disc with narrow transverse basal impression; paramedial carinae absent, paralateral plicae present ( O. carltoni ) or absent (undescribed species from New Zealand); posterolateral angles right to slightly acute. Prothoracic hypomeron separated from prosternum by suture. Prosternum with anterior margin on same plane as disc; prosternal process with lateral beads present, parallel, connecting across apex, slightly expanded apically, broadly to narrowly rounded and crenulate with minute setae; procoxal cavity with anterolateral notch. Scutellar shield clearly visible, transverse. Elytron without humeral tooth; subbasal impression absent, subapical impression absent; subapical gape present; punctation confused, moderately dense to dense, weakly to moderately impressed; vestiture dual with a few to numerous long or short, erect or suberect setae present laterally and on disc (undescribed species from New Zealand) or decumbent only ( O. carltoni ), decumbent setae with undulate pattern with postscutellar and subapical setae directed laterally (undescribed species from New Zealand) or directed straight posteriorly ( O. carltoni ). Hind wing well developed. Mesoventrite with mesoventrital cavity shallow and punctate, flanked by carinae. Mesanepisternal pit present, glabrous. Metaventrite without postcoxal lines; discrimen present, more than half length of metaventrite, posterior notch of metaventrite present. Metendosternite not studied. Tarsi 5-5- 5 in female, 5-5- 4 in male (at least in undescribed species from New Zealand; male of O. carltoni unknown); tarsi slender, tarsomere 5 as wide as preceding tarsomeres in lateral view; pro- and mesotarsomere 4 bisetose; mesotarsomere 3 not lobed, with few setae; mesotarsomeres 1–3 of subequal to equal lengths, 1 slightly longer than 2, 4 slightly shorter than 3, mesotarsomere 5 slightly longer than mesotarsomeres 1–4 combined. Abdominal ventrites free; ventrite 1 with intercoxal process narrowly to broadly rounded, with acuminate (undescribed species from New Zealand) or without ( O. carltoni ) postcoxal lines; medio-basal thickenings of ventrites 3–5 absent; apex of ventrite 5 without crenulations.

Etymology. The generic name is derived from a combination of the Greek “ odontos ”, meaning tooth, and “ somatos ”, meaning “of the body”, in reference to the lateral pronotal teeth. The gender is feminine.

Biology. The species we describe here is from two female specimens collected in forests in high altitude Polylepis Ruiz & Pav. (Rosaceae) forests in the páramo in Ecuador, whereas the other, undescribed species is from the Three Kings Islands of New Zealand, represented by a single specimen. These were not dissected, and characters of the mandible and internal structures of the abdomen were not examined.

Distribution. Ecuador, New Zealand.

Included species (1+1). Odontosomatula carltoni sp. nov.; one undescribed species from New Zealand.

Figures

Figs 46–54. Habitus of species of Picrotini. 46 – Notocryptus n. sp. 10 (Australia: NSW, Tas); 47 – Notocryptus n. sp. 11 (Australia: NSW, Qld, Vic); 48 – Notocryptus n. sp. 12 (Australia: NSW, Qld, Vic); 49 – Notocryptus n. sp. 13 (Australia: Qld); 50 – Odontosomatula carltoni sp. nov.; 51 – Odontosomatula n. sp. 1 (New Zealand); 52 – Orthoscelis transversus sp. nov.; 53 – Orthoscelis n. sp. 1 (Australia: NSW, Qld, Tas, Vic); 54 – Orthoscelis n. sp. 2 (Australia: ACT, NSW, Tas, Vic). Scale bars = 1 mm.

Figs 77–81. Characters of Picrotini. 77–78 – detail of pronotum. 77 – Chimaerocryptus johnsoni sp. nov.; 78 – Odonotosomatula carltoni sp. nov. 79 – pronotum and base of elytra, Humerocryptus n. sp. 1. 80 – antennal club, Paragnetaria slipinskii sp. nov. 81 – eye, Cryptothelypterus pteropilosus Leschen & Lawrence, 1991. Abbreviations: pp = paralateral plica.