Anillinus folkertsioides Sokolov 2020, sp. n.
Creators: name: Sokolov, Igor M.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Anillinus
Anillinus folkertsioides

description: Anillinus folkertsioides Sokolov, sp. n.
(Figs. 1B, 2B, 3B, 4 D–F, 5)
Type material. Holotype, one male (CMNH), dissected, labeled: \ nr. Stewart Cave, Ala. Jackson Co. 5-VII-58 Hollow beech debris \ H. R. Steeves, Jr. Collector \ [handwritten]. Paratypes, three specimens, one male labeled: \ Creek Cave nr Grant, Marshall Co. 25. V.58— Berlesed from cave debris \ H. R. Steeves, Jr. Collector \ [handwritten]; one female labeled: \ Creek Cave nr Grant, Marshall Co., Ala. 2. V.58— Berlesed from cave debris \ H. R. Steeves, Jr. Collector \ [handwritten]; one female labeled: \ nr. Creek Cave, Grant, Marshall Co. 25. V.58 Hollow beech debris \ H. R. Steeves, Jr. Collector \ [handwritten].
Specific epithet. The name of this species originates from the species name “ folkertsi ” and the Greek suffix – oides (similar to), alluding to the similarity in male genitalia between the new species and A. folkertsi Sokolov & Carlton (in Sokolov et al. 2004).
Type locality. USA, Alabama, Jackson County, near Stewart Cave.
Differential Diagnosis. Males of A. folkertsioides can be distinguished from those of the other congeners by the structure of the median lobe with strongly enlarged apex and very long flagellum-like copulatory sclerite in the internal sac.
Description. Medium-sized for genus (ABL 1.55–1.69 mm, mean 1.64± 0.063 mm, n=4).
Habitus: Body form (Fig. 1B) moderately convex, elongate ovoid (WE/ABL 0.38±0.008), head wide relative to pronotum (WH/WPm 0.76±0.020), pronotum moderately narrow in comparison to elytra (WPm/WE 0.78±0.023).
Integument: Body color brunneo-rufous, appendages testaceous. Microsculpture distinct (Fig. 2B), with isodiametric mesh pattern of polygonal sculpticells over all dorsal surfaces of head, pronotum, and elytra. Body surface shiny, surface sparsely and finely punctate, covered with sparse, yellowish, short setae. Vestiture of elytra moderately long (0.3–0.4 length of discal setae).
Prothorax: Pronotum (Fig. 3B) moderately convex, of moderate size (LP/LE 0.40±0.015), moderately transverse (WPm/LP 1.27±0.023), with lateral margins rectilinearly and moderately constricted posteriorly (WPm/WPp 1.24±0.028). Anterior angles indistinct, posterior angles slightly obtuse (105–110°). Width between posterior angles slightly greater than between anterior angles (WPa/WPp 0.95±0.024). Basal margin straight in middle, slightly oblique at sides.
Scutellum: Externally visible, triangular, with narrowly rounded apex.
Elytra: Narrowly depressed along suture, with traces of 1–2 striae, of average length (LE/ABL 0.59±0.011) and width (WE/LE 0.65±0.016) for genus. Humeri distinct, rounded, in outline forming right angle with longitudinal axis of body. Lateral margins subparallel in middle, slightly divergent at basal fifth, evenly rounded to apex in apical third, without subapical sinuation. Basal margination distinct.
Legs: Protarsi of male with moderately dilated tarsomere 1. Profemora moderately swollen. Metafemora unmodified.
Male genitalia: Median lobe of aedeagus (Fig. 4D) anopic, slightly arcuate, with moderately short and subparallel shaft, with greatly enlarged ovoid apex, widely rounded at tip. The membranous wall of apical ostium is attached to the middle of apical tip thus dividing apex into dorsal and ventral portions. Ventral margin of median lobe moderately enlarged, convex, without poriferous canals. Dorsal copulatory sclerites in form of filament-like structure, apically swirled in short spiral, much longer than aedeagal length. Ventral copulatory sclerites and spines lacking. Sclerotized membranous folds of internal sac present at the middle of shaft. Left paramere (Fig. 4E) of shape common in genus, paramere apex without setae. Right paramere (Fig. 4F) strongly elongate, bearing a tuft of long setae basally and many (>5) long setae apically; length of basal setae similar to the length of paramere, apical setae shorter than half of the length of paramere.
Geographic Distribution. This species is known from two localities in Jackson and Marshall Counties, Alabama (Fig. 5, red stars).
Habitat. According to the label, the small series of specimens of this species was collected in a hollow with beech debris and sifted out from the debris in a cave. Two collections made outside a cave suggest that this is not a true cavernicolous species.
Relationships. The species is a sister species to A. folkertsi Sokolov & Carlton, and the two form a small distinctive group within the genus.
description: Published as part of Sokolov, Igor M., 2020, Four new species of the genus Anillinus Casey (Coleoptera, Carabidae, Anillini) from Alabama, U. S. A., with a revised key to the Alabama species, pp. 547-559 in Zootaxa 4808 (3) on pages 549-551, DOI: 10.11646/zootaxa.4808.3.9, http://zenodo.org/record/3933785