Ummidia riverai, 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 riverai sp. nov. Fig. 48 , Map 5

Type material.

HOLOTYPE: 1 ♂ (UMM496) from 8 kilometers south of Purulhá, Baja Verapaz, Guatemala, 15.1631 -90.2316 5, 2167 m a.s.l., 29.v.1991, coll. HF Howden, AMNH.

Etymology.

The specific epithet is a patronym in honor of Mario Dary Rivera, and environmentalist and patriarch of Guatemala’s environmental movement. Rivera was instrumental in the creation of the Quetzal Biotope (Biotopo de Mario Dary Rivera) near where the type specimen was collected.

Diagnosis.

Ummidia riverai males can be distinguished from all other geographically proximate males except U. rugosa by the presence of a pale dorsal heart patch on the abdomen and from all geographically proximate species by the presence of a defined comb of alternating long and short spinules on the retrolateral face of tarsus I. Males can be further differentiated from U. huascazaloya , U. anaya , U. cuicatec , U. brandicarlileae , U. zebrina , U. yojoa , and U. varablanca by having relatively more spines on the prolateral (19 vs 0-11) and retrolateral (22 vs 1-17) faces of tibia I.

Description of male holotype.

Specimen preparation and condition. Specimen preserved in 80% EtOH. Left palp and leg I removed, in vial with specimen. General coloration. Carapace, chelicerae, legs reddish black 10R 2.5/1, tarsi story brown 7.5YR 5/8. Abdomen black 7.5YR 2.5/1 with dorsal heart patch gray 7.5YR 5/1. Cephalothorax. Carapace 4.21 long, 4.21 wide. Pars cephalica 2.94 long. Foveal groove procurved, 0.24 long, 0.78 wide. Tubercle high. AER procurved. PER straight. Eye group 0.6 long, 1.06 wide, AME 0.27, PME 0.19, ALE 0.37, PLE 0.2. Sternum sparsely setose around outer 1/3, STRl 2.41, STRw 2.44. Chelicerae with anterior tooth row comprising four teeth, posterior margin with six teeth. Palpal endites with 29 medium and large cuspules spread over proximal 3/4 of endite face, lacking distal endite cuspules, ENDw 1, ENDl 1.54. Labium with eight cuspules, LBw 0.91, LBl 0.66. Rastellum reduced with seven small spines on distal cheliceral margin. Abdomen setose with dorsal heart patch. Legs. F1 4.21; F1w 1.16; P1 1.97; Ti1 2.51; Mt1 2.07; Tr1 1.02; F3 2.86; F3w 1.04; P3 1.46; Ti3 1.73; Sd3 1.01; Mt3 1.53; Tr3 1.09; F4 3.63; F4w 1.16; P4 1.7; Ti4 2.1; Mt4 2.24; Tr4 1.14. Retrolateral face of tarsus IV with comb of interspersed long and short hairs. Leg I spination pattern: TSp 10, TSpv 9, TSrd 0, TSr 1, TSrv 22, MtSp 13, MtSr 11, TrSp 5, TrSr 9. Pedipalps. PTl 2.06, PTw 0.77, Bl 1.89. Embolus relatively long, slightly sinuous.

Variation, males.

Known only from male type specimen.

Females.

Unknown.

Figures

Map 5. Locality records for southern Mexico and Central American species.

Figure 48. Ummidia riverai sp. nov. male holotype (UMM 496) from Baja Verapaz, Guatemala. 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-B), 4.0 mm (E).