Ummidia rosillos, Godwin & Bond, 2021

Godwin, Rebecca L. & Bond, Jason E., 2021, Taxonomic revision of the New World members of the trapdoor spider genus Ummidia Thorell (Araneae, Mygalomorphae, Halonoproctidae), ZooKeys 1027, pp. 1-165 : 1

Ummidia rosillos sp. nov. Fig. 23 , Map 4

Type material.

HOLOTYPE: 1 ♂ (UMM810) from Rosillos Mountains, Big Bend National Park, Brewster County, Texas, United States, 29.5385 -103.2323 5, 1386 m a.s.l., 12.vii.1991, coll. R Vogtsberger, DMNS.

Etymology.

The specific epithet is a noun taken in apposition and is in reference to the type locality.

Diagnosis.

Ummidia rosillos males can be differentiated from all geographically proximate species except U. audouini by the presence of a brush on the retrolateral face of tarsus IV and from all geographically proximate species by the presence of a pale dorsal heart patch. Males dispersing July to September.

Description of male holotype.

Specimen preparation and condition. Specimen preserved in 80% EtOH. Left palp and legs I removed; in vial with specimen. General coloration. Carapace and chelicerae reddish blank 7.5YR 2.5/1. Abdomen very dark brown 10YR 2/2 with heart patch light gray 10YR 7/2. Cephalothorax. Carapace 7.17 long, 6.87 wide. Pars cephalica 4.51 long. Foveal groove procurved, 0.45 long, 1.38 wide. Tubercle moderate; only under AME. AER procurved. PER straight. Eye group 0.7 long, 1.58 wide, AME 0.29, PME 0.16, ALE 0.4, PLE 0.16. Sternum sparsely setose, STRl 4.28, STRw 4.13. Chelicerae with anterior tooth row comprising five teeth, posterior margin with six teeth. Palpal endites with 13 cuspules spread over proximal half of endite face, lacking distal endite cuspules, ENDw 1.49, ENDl 2.85. Labium with five cuspules, LBw 1.49, LBl 1.04. Rastellum with several small teeth on process. Abdomen setose with irregular pale heart patch. Legs. F1 6.75; F1w 1.55; P1 3; Ti1 4.33; Mt1 2.69; Tr1 1.38; F3 4.95; F3w 1.95; P3 2.73; Ti3 2.98; Sd3 1.83; Mt3 2.61; Tr3 2.1; F4 6.6; F4w 1.91; P4 2.84; Ti4 4.13; Mt4 4.23; Tr4 2.13. Tarsus I with mixed dorsal cluster of clavate/filiform trichobothria. Retrolateral face of tarsus IV with brush. Leg I spination pattern: TSp 0, TSpv 0, TSrd 0, TSr 0, TSrv 2, MtSp 0, MtSr 0, TrSp 0, TrSr 0. Pedipalp: PTl 4.44, PTw 1.31, Bl 3.58. Embolus relatively long; sinuous.

Variation, males

(n = 2). CL 7.03-7.17, 7.1 ± 0.07; CW 6.75-6.87, 6.81 ± 0.06; Cap 4.51-4.61, 4.56 ± 0.05; ENDl 0.7-0.79, 0.75 ± 0.04; ENDw 1.49-1.58, 1.54 ± 0.05; STRl 4.17-4.28, 4.23 ± 0.05; STRw 3.7-4.13, 3.91 ± 0.22; LBl 1.03-1.04, 1.03 ± 0.01; LBw 1.41-1.49, 1.45 ± 0.04; F1 6.07-6.75, 6.41 ± 0.34; F1w 1.55-1.57, 1.56 ± 0.01; P1 2.9-3, 2.95 ± 0.05; Ti1 4.11-4.33, 4.22 ± 0.11; Mt1 2.6-2.69, 2.64 ± 0.04; Tr1 1.38-1.4, 1.39 ± 0.01; F3 4.61-4.95, 4.78 ± 0.17; F3w 1.89-1.95, 1.92 ± 0.03; P3 2.6-2.73, 2.66 ± 0.06; Ti3 2.91-2.98, 2.94 ± 0.04; Mt3 2.61-2.9, 2.75 ± 0.14; Tr3 2.09-2.1, 2.09 ± 0.01; F4 5.98-6.6, 6.29 ± 0.31; F4w 1.83-1.91, 1.87 ± 0.04; P4 2.77-2.84, 2.81 ± 0.03; Ti4 4.04-4.13, 4.09 ± 0.05; Mt4 3.91-4.23, 4.07 ± 0.16; Tr4 2.13-2.15, 2.14 ± 0.01; TSp 0-0, 0 ± 0; TSpv 0-5, 2.5 ± 2.5; TSr 0-0, 0 ± 0; TSrv 2-9, 5.5 ± 3.5; PTl 4.02-4.44, 4.23 ± 0.21; PTw 1.29-1.31, 1.3 ± 0.01; BL 2.58-3.29, 2.94 ± 0.36.

Females.

Unknown.

Material examined.

United States: Texas: Brewster Co: Big Bend Natl Park, at junction of US385 and St Rd 118, 29.3172 -103.3925 5, 1006 m a.s.l. (UMM0625, 2.ix.1968, 1♂, JA Brubaker, FJ Moore, AMNH); Rosillos Mountains , Big Bend National Park , 29.5385 -103.2323 5, 1386 m a.s.l. (UMM0810, 12.vii.1991, 1♂, R Vogtsberger, MSU) .

Figures

Map 4. Locality records for western United States and northern Mexico species.

Figure 23. Ummidia rosillos sp. nov. male holotype (UMM 810) from Brewster Co., Texas A retrolateral aspect, leg I B prolateral aspect, leg I C line drawings, leg I retrolateral and prolateral aspects D retrolateral aspect, pedipalp E habitus illustration. Scale bars: 1.0 mm (A-D), 4.0 mm (E).