Arianops barri, Carlton, 2008

Carlton, Christopher E., 2008, Eight New Species ofArianopsBrendel from the Southeastern United States with an Updated Key and Notes on Additional Species (Coleoptera: Staphylinidae: Pselaphinae), The Coleopterists Bulletin 62 (2), pp. 297-323 : 297-323

publication ID	https://doi.org/ 10.1649/1082.1
persistent identifier	https://treatment.plazi.org/id/8D2B87E4-FF93-DC5E-FE1B-FD45B7D5FE3E
treatment provided by	Valdenar
scientific name	Arianops barri
status	sp. nov.

Treatment

Arianops barri View in CoL , new species

( Figs. 9–10 View Figs , 26–27 View Figs , 37 View Figs )

Holotype male ( Fig. 26 View Figs ). /ALA: Jackson Co., Paint Rock River Estille Fork April 14, 1979 / Under rocks leg: T. King/ Arianops barri Carlton, 2007 Holotype male/. Type deposition, Field Museum of Natural History, Chicago, IL .

Paratype female. Same data as holotype.

Etymology. The species is named after Thomas C. Barr in recognition for his contributions to coleopterology and speleology.

Description. Holotype male. Measurements (in mm): head 0.50 long, 0.55 wide; pronotum 0.60 long, 0.55 wide; elytra 0.68 long, 0.85 wide; median lengths of visible abdominal tergites 1–5, respectively 0.43, 0.10, 0.10, 0.42, 0.05. Antennomeres 1–11, respectively 0.15, 0.11, 0.10, 0.10, 0.10, 0.10, 0.08, 0.08, 0.07, 0.10, 0.25. Aedeagus 0.35 long, 0.25 wide. Total length 2.90.

Head ( Fig. 26 View Figs ). Lateral vertexal carinae developed for a short distance posterior to antennal tubercles. Median occipital carina weak, visible on posterior declivity of occiput. Vertexal foveae normally developed, nude, connected via ushaped circumambient sulcus that is weak posteriorly, becoming broadly concave between antennal tubercles. Carinae to antennal tubercles continuous with median clypeal carina on posterior one third. Labral margin bearing four teeth. Lateral carinae from clypeus to ocular spines well-developed. Ocular spine prominent, triangularly acute, oriented anterolaterally.

Pronotum. Basomedian fovea absent, submedian spines and bumps absent. Antebasal median tumosity absent. Three pairs of well-developed basolateral foveoid depressions present, two near basal margin and one more anterior and lateral. Pronotum weakly transversely rugose along basolateral margin.

Elytra. Basal margin of each elytron straight to humeral declivity. Basal depressions and foveae absent.

Legs unmodified.

Abdomen. Dorsally rounded, lateral margin of tergite 2 divergent from base to its broadest point at posterior margin, abdomen evenly convergent to apex from that point. Visible ventrite 4 with a broad, rounded lamella that originates near anterior margin and reaches posterior margin ( Fig. 27 View Figs ). Ventrite 6 broadly concave.

12) A. folkertsi .

Aedeagus ( Fig. 37 View Figs ). Parameres absent, basal bulb lacking internal processes. Ventral shelf asymmetrical, evenly emarginate across apical margin, right angle extending straight posteriorly, left angle oriented laterally, then slightly curved with apex oriented posteriodorsally, bearing a short seta along curved left margin of shelf and a cluster of four setae near right base of shelf.

312 Female. Tergite 5 sharply, narrowly upturned at apex. Ventrite 4 lacking median spine. Ventrite 6 broadly flattened.

Material examined. Only the holotype and paratype are known.

Distribution. The species is only known from the type locality in Jackson County, Alabama.

Comments. External characters of A. barri are consistent with Barr’s (1974) cavernensis species group if the lateral vertexal carinae are discounted. The absence of the median pronotal fovea is particularly diagnostic for the group. The species is similar to both A. ashei and A. folkertsi , but differs in completely lacking a median pronotal tumulus, and in the shape of the aedeagal shelf and orientation of the lateral fingerlike processes.