Chimaerocryptus johnsoni, 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 : 77

Chimaerocryptus johnsoni sp. nov.

( Figs 18 , 77 )

Type material. Hඈඅඈඍඒඉൾ: female ( CMN), labeled:“CHILE:40kmWAngol NahuelbutaNat. Pk. 9.XII.84-17.II.85 S&J. Peck, 1200-1500m FITS Nothofagus – Araucariafor”. Pൺඋൺඍඒඉൾ: CHILE: Mൺඅඅൾർඈ Pඋඈඏංඇർൾ: 40 km W Angol, Nahuelbuta NP, 1200–1500 m, Nothofagus / Araucaria forest, FIT, 9 December 1984 – 17 February 1985, S. & J. Peck (1 slide mounted, CMN).

Diagnosis. This is the only known member of the genus; therefore, it may be recognized by the characters given in the generic diagnosis above.

Description. Length 1.80–1.85 mm. Color of body ( Fig. 18 ) light brown, legs and mouthparts lighter. Dorsal setae uniformly golden, vestiture converging to midline of pronotum, strongly undulating subbasally on elytra, weakly undulating subapically, pronotum and elytra with decumbent setae long, appearing longer on the pronotum and base of the elytra. Ventral surfaces with recumbent setae, prosternal meso- and metaventral setae about as long as those on the dorsum, abdominal setae shorter; densely punctate on most ventral surfaces, more diffuse laterally on prothorax and lateral sclerites; prosternal process with suberect setae with large punctures; punctation of metaventrite slightly less dense than that of prosternum, uniform; abdominal ventrites 1 and 2 with punctures as dense as metaventrite, ventrites 3 and 4 less dense, ventrite 5 densely micropunctate, bearing a patch of centrally-directed setae.

Head punctate with smooth and shiny interspaces. Antennomere 2 subconical with apex wider than base, longer than wide, antennomere 3 conical, longer than wide and as long as 2, antennomere 4 smaller and shorter than 3 and longer than 5; antennomere 11 longer than 10, distinctly shorter than 9 and 10 combined. Pronotal length/width ratio ~0.68 ( Fig. 77 ), widest at middle (or at tips of posterior angles), wider across posterior angles than across anterior angles; lateral edges subparallel, convergent apically, anterior angles not projecting, posterior angles strongly projecting and right, posterior margin weakly bisinuate, with truncate scutellar lobe; disc with a deep transverse basal impression; paralateral plicae absent; pronotal punctation similar to that of frons but slightly larger and more regular over much of the disc, punctures separated by less than one puncture diameter, with smooth and shiny interspaces, punctures more or less uniform, weakening laterally. Elytra about 1.53× longer than combined width, about 1.50× wider than pronotum at greatest width, about 3.36× longer than pronotum at greatest length; punctation dense to moderately dense, punctures separated by 0.5 to 4 puncture diameters, denser near basal margin, sparser on disc; sutural stria present; disc with distinct transverse subbasal impression.

Etymology. Patronymic for the late Colin Johnson (1943–2021; Manchester Museum, England), world renowned microcoleopterist and cryptophagid worker extraordinaire (Dൾඇඇංඌ 2022).

Figures

Figs 10–18. Habitus of species of Picrotini. 10 – Bellascelis n. sp. 1 (Australia: Qld); 11 – Bellascelis n. sp. 2 (Australia: NSW); 12 – Chileothortus infuscatus sp. nov.; 13 – Chiliotis sp. 1; 14 – Chiliotis sp. 2; 15 – Chiliotis sp. 3; 16 – Chiliotis sp. 4; 17 – Chiliotis sp. 5; 18 – Chimaerocryptus johnsoni sp. nov. 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.