Chileothortus infuscatus, 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 : 73-74

Chileothortus infuscatus sp. nov.

( Fig. 12 )

Type material. Hඈඅඈඍඒඉൾ: male ( FMNH), labeled: “ CHILE: Valdivia, Parque Oncol, cruce camino Curiñauco, 20.02.2000, [39°41′56.93′′S, 73°19′39.10′′W], extracción Berlese, T. Cekalovic, T632”.

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 1.46 mm. Color of body ( Fig. 12 ) reddish-brown, legs lighter; each elytron with subbasal maculation that broadens laterad. Dorsal setae uniformly golden, vestiture converging to central point on pronotum, undulating at apex of elytra, pronotum and elytra with long, decumbent to suberect and shorter erect setae, may appear longer and erect along sides and margins, especially the base of the elytra. Ventral surfaces with recumbent and erect setae, shorter in length compared with those on dorsum; densely punctate on most surfaces; prosternal process with sparse, suberect setae; punctation of metaventrite as dense as that of prosternum, uniform; abdominal ventrites 1 and 2 with punctures as dense as metaventrite, on ventrites 3 and 4 less dense, and on ventrite 5 denser and smaller towards apex, which bears a patch of posteriorlydirected setae.

Head rugose, glabrous on frons, with smooth and shiny interspaces. Antennomere 2 globular, as long as wide, antennomere 3 conical, as long and as wide as 2, antennomere 4 subequal in width to 3, shorter than 3 and similar in length to 5; antennomere 11 much longer than 10, slightly shorter than 9 and 10 combined. Pronotal length/width ratio ~0.80, widest at apical 1/3, wider across posterior angles than across anterior angles; lateral edges subparallel, very weakly widened at about anterior 1/3, then convergent, anterior angles not projecting, posterior angles not projecting posterolaterally and somewhat obtuse, posterior margin weakly sinuate, with truncate scutellar lobe; disc with a moderately deep medial basal impression; paralateral plicae absent; pronotal punctation not similar to that of frons but more regular over much of the disc, punctures separated by about one puncture diameter or less, with smooth and shiny interspaces, punctures larger and fusing at base and becoming rugose. Elytra about 1.53× longer than combined width, about 1.17× wider than pronotum at greatest width, about 2.11× longer than pronotum at greatest length; punctation moderately dense, punctures separated by 2–5 puncture diameters, denser near basal margin, sparser on disc; sutural stria absent; disc lacking impressions.

Remarks. This species is known only from the male holotype. The full locality information for this specimen was determined with the help of Mario Elgueta.

Etymology. The specific epithet is taken from the Latin participle “ infuscatus ”, meaning “darkened” or “obscured”, in reference to the conspicuous subbasal dark maculation on the elytra.

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.