Foveocryptus, 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 : 83

Foveocryptus gen. nov.

( Figs 26 , 91 )

Type species. Foveocryptus chenyandongi sp. nov., by present designation.

Diagnosis. This genus may be distinguished most easily by the deep, circular impression in the center of the pronotum ( Fig. 26 ). It can be further distinguished by the presence of divergent postcoxal lines on the metaventrite ( Fig. 91 ), anterior angles of the pronotum not protruding, pronotum lacking a lateral glabrous space, teeth, or platforms, an antennal club composed of three antennomeres, and having all five abdominal ventrites free.

Description. Length 1.50–1.53 mm. Body form ( Fig. 26 ) elongate, parallel-sided, somewhat shining dorsally, with dense decumbent setae and with scattered sparse, suberect setae dorsally; distinctly bicolored. Head with tempora prominent, length 1/4 length of eye; vertex with temporal depression immediately anterior to ridge; band of reticulate sculpture present. Frontoclypeus not projecting laterally; raised portion of frons between antennal insertions not constricted, 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 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 and not distinctly constricted at base, widest anteriorly; anterior angles absent, not projecting anteriorly (not extending anterior to cervical foramen of prothorax), without a distinct flat glandular surface or platform; lateral carina complete, smooth, lacking teeth, crenulations, or setigerous tubercles, with lateral glabrous space absent, width of lateral bead wider than discal puncture and narrower than antennal funicle; disc with large, deep, distinct central fovea, two weak subbasal paramedial impressions, and a weak 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 marginal beads present, parallel, not connected around apex, process slightly expanded apically and ligulate, broadly rounded at the apex, and crenulate with minute setae; procoxal cavity with anterolateral notch. Scutellar shield clearly visible, transverse. Elytron with humeral tooth; impressions absent; subapical gape present; punctation confused, moderately dense and well impressed; vestiture dual with a few long, sparse, erect setae present, subdecumbent setae forming postscutellar undulation with setae directed medially. Hind wing well developed. Mesoventrite with mesoventrital cavity shallow, flanked by sharp carinae. Mesanepisternal pit absent. Metaventrite ( Fig. 91 ) with anteriorly convergent postcoxal lines, continuous with lateral sides of metaventrital process; discrimen more than 1/2 length of metaventrite, posterior notch of metaventrite present. Tarsi 5-5- 4 in male; tarsi moderately slender, tarsomere 4 as wide as preceding tarsomeres in lateral view; pro- and mesotarsomere 3 lacking ventral setae; mesotarsomeres 2 and 3 unlobed; metatarsomeres 1–3 of equal lengths, mesotarsomere 4 about as long as mesotarsomeres 1–3 combined. Abdominal ventrites free, intersegmental crenulations absent; ventrite 1 with intercoxal process narrowly rounded, with acuminate postcoxal lines; medio-basal thickenings of ventrites 3–5 absent; apex of ventrite 5 lacking crenulations.

Remarks. We assume that the two known specimens are male based on the 5-5-4 tarsomeres; these were not dissected. The following characters are unknown: presence of subapical serrations on the mandible, form of the metendosternite, presence and distribution of abdominal calli, and forms of the spiracles and aedeagus.

Etymology. The generic name is derived from a combination of the Latin “ fovea ”, meaning pit, in reference to the central pit on the pronotum, and “ -cryptus ”, a common generic ending in Cryptophagidae . The gender is masculine.

Biology. One specimen was collected in a flight intercept trap, and the other was collected during heavy rains from wet wood.

Distribution. New Zealand.

Included species (1). Foveocryptus chenyandongi 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.