Anillinus Casey, 1918

Sokolov, Igor M., Reddell, James R. & Kavanaugh, David H., 2014, Life beneath the surface of the central Texan Balcones Escarpment: genus Anillinus Casey, 1918 (Coleoptera, Carabidae, Bembidiini): new species, a key to the Texas species, and notes about their way of life and evolution, ZooKeys 417, pp. 71-101 : 74-75

Taxon classification Animalia Coleoptera Carabidae

Anillinus Casey, 1918

Anillinus Casey, 1918: 167. For generic synonymy, see Bousquet (2012: 699).

Type species.

Anillinus carolinae Casey, 1918.

Recognition.

All examined specimens of Texan Anillina are characterized by the following combination of characters: Head totally covered with microsculpture (Fig. 2 A–C) comprised of irregular, nearly isodiametric sculpticells. Anterior margin of labrum and clypeus straight. Frontal area flat with minute tubercle (ft) medially near frontoclypeal suture. Fronto-lateral carinae distinct and long. Primary head setae include a pair of clypeal (cs), a pair of frontal (fs) and two pairs of supraorbital (ass and pss) setae. Labium (Fig. 3 A–B) with mental tooth; mentum and submentum separated by mental-submental suture (ms). Glossal sclerite (gsc) with distinct paraglossae (pg) laterally and with two setae apically. Maxillary palps (Fig. 2 A–C) with short 4th palpomere (mp4), which is 0.2-0.3 length of palpomere 3 (mp3). Pronotum (Fig. 2 D–F) of various proportions, totally covered with microsculpture (which is pronounced in most specimens, but present only as very fine microlines visible only at a certain angle in some specimens), with two long primary lateral setae (middle, ls, and basal, bs) on each side. Elytra (Fig. 2 G–J) totally covered with microsculpture, with basal margination (bm) distinct and long, with scutellar, three discal, apical, and the series umbilicata setae. Scutellar and discal setae of similar size and approximately three times longer than surrounding vestiture. In most species, last two (8th and 9th) pores (eo8 and eo9) of umbilicate series much closer to each other than 7th (eo7) pore is to 8th (not so only in Anillinus depressus (Jeannel)). Abdomen with ventrite 5 of male with two and of female with four setae along the posterior margin. Aedeagi of males of all examined species with two parameres (Fig. 6), the typical configuration for most Anillina .

The arrangement of discal setae of elytra and the presence of two parameres in male aedeagi allow us to place all investigated species into the genus Anillinus . Beetles at hand vary in habitus from slightly to markedly elongate (WE/SBL ≤ 0.38), possess pronota with a rather narrow basal margin (WPa/WPp ≥ 1.00), and are completely covered with microsculpture dorsally (Fig. 2 A–J). This combination of features allows us to place all of them in group 1 of endogean species of Anillinus ( Sokolov et al. 2004).

A key for identification of adults of the genus Anillinus from Texas