Ummidia pesiou, 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 pesiou sp. nov. Fig. 36 , Map 4

Type material.

HOLOTYPE: 1 ♀ (UMM464, AMNH) from 16 miles east of Hermosillo, Sonora, Mexico, 29.0894 -110.6947 5, 371 m a.s.l., 20.viii.1960, coll. Zweifel et. al., AMNH.

Etymology.

The specific epithet is a noun taken in apposition and is in reference to the original Yaqui name for Hermosillo.

Diagnosis.

Ummidia pesiou can be differentiated from all other geographically proximal species by having a well-developed rastellum with spines extending up the cheliceral face 3 ' the length of the rastellar process. Females can be differentiated from U. gabrieli by having significantly more endite cuspules (59 vs 28) and from U. pustulosa by having the sternum roughly as wide as long.

Description of female holotype.

Specimen preparation and condition. Specimen preserved in 80% EtOH. Spermathecae removed, cleared, in vial with specimen. Right leg II missing. Left legs IV and II removed, in vial with specimen. General coloration. Carapace, chelicerae, and legs dark reddish brown 2.5YR 2.5/3. Abdomen brown 10YR 4/3, spinnerets strong brown 7.5YR 4/6. Cephalothorax. Carapace 10.45 long, 9.5 wide. Pars cephalica 6.88 long. Foveal groove procurved, 0.5 long, 1.92 wide. Eye tubercle low under ME. AER procurved PER straight. Eye group 1.02 long, 2.51 wide, AME 0.49, PME 0.32, ALE 0.51, PLE 0.39. Sternum sparsely setose, STRl 6.1, STRw 6.05. Chelicerae with anterior row comprising seven teeth, posterior margin with five teeth. Palpal endites with 32 cuspules spread across proximal half of endite and 27 smaller cuspules distally, ENDw 2.51, ENDl 3.94. Labium with seven cuspules, LBw 2.41, LBl 1.39. Rastellum with many strong spines on process and up cheliceral face for ~ 3 ' length of process. Abdomen. Evenly setose; and lighter dorsally. Legs. F1 5.8; F1w 2.16; P1 3.58; Ti1 3.64; Mt1 2.43; Tr1 1.43; F3 4.96; F3w 2.98; P3 3.75; Ti3 3.11, Sd3 2.1; Mt3 1.92; Tr3 2.1; F4 6.96; F4w 2.91; P4 3.58; Ti4 3.63; Mt4 3.69; Tr4 1.95. Retrolateral face tarsus IV with longitudinal cluster of spinules over central half of tarsus surrounded in setae. Pedipalps. PF 5.48, PP 3.08, PTi 3.69, PTr 3.01. Spermathecae tilted laterally with distal coil, bulbs face laterally.

Variation, females

(n = 2). CL 6.14-10.45, 8.29 ± 2.16; CW 5.93-9.5, 7.71 ± 1.79; Cap 4.22-6.88, 5.55 ± 1.33; ENDl 0.66-1.02, 0.84 ± 0.18; ENDw 1.43-1.86, 1.65 ± 0.22; STRl 3.63-6.1, 4.87 ± 1.23; STRw 3.49-6.05, 4.77 ± 1.28; LBl 1-1.39, 1.19 ± 0.19; LBw 1.46-2.41, 1.94 ± 0.47; F1 3.47-5.8, 4.63 ± 1.16; F1w 1.38-2.16, 1.77 ± 0.39; P1 2.29-3.58, 2.94 ± 0.65; Ti1 2.2-3.64, 2.92 ± 0.72; Mt1 1.29-2.42, 1.85 ± 0.57; Tr1 0.95-1.43, 1.19 ± 0.24; F3 3.09-4.96, 4.03 ± 0.93; F3w 1.87-2.98, 2.43 ± 0.56; P3 2.13-3.75, 2.94 ± 0.81; Ti3 1.7-3.11, 2.4 ± 0.7; Mt3 1.25-1.92, 1.59 ± 0.33; Tr3 1.21-2.1, 1.66 ± 0.45; F4 4.21-6.96, 5.58 ± 1.37; F4w 1.8-2.91, 2.36 ± 0.55; P4 2.22-3.58, 2.9 ± 0.68; Ti4 2.1-3.63, 2.87 ± 0.77; Mt4 2.14-3.69, 2.92 ± 0.77; Tr4 1.43-1.95, 1.69 ± 0.26; PF 3.19-5.48, 4.33 ± 1.15; PP 1.86-3.08, 2.47 ± 0.61; PTi 2.19-3.69, 2.94 ± 0.75; PTr 1.55-3.01, 2.28 ± 0.73.

Males.

Unknown.

Material examined.

Mexico: Sonora: 16 mi E of Hermosillo , 29.0894 -110.6947 5, 371 m a.s.l. (UMM0464, 20.viii.1960, 1♀, Zweifel et al, AMNH); Guaymas, 27.914 -110.902 6, 17 m a.s.l. (UMM0533, 20.viii.1964, 1♀, WJ Gertsch, JM Woods, AMNH) .

Figures

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

Figure 36. Ummidia pesiou sp. nov. female holotype specimen (UMM 464) from Sonora, Mexico. A female habitus illustration B cleared spermathecae. Scale bars: 4.0 mm (A), 1.0 mm (B).