Taxonomic revision of the New World members of the trapdoor spider genus Ummidia Thorell (Araneae, Mygalomorphae, Halonoproctidae) Author Godwin, Rebecca L. https://orcid.org/0000-0002-2439-2868 Department of Entomology and Nematology, University of California, Davis 1 Shields Ave, Davis, CA, 95616 rlc0004@tigermail.auburn.edu Author Bond, Jason E. Department of Entomology and Nematology, University of California, Davis 1 Shields Ave, Davis, CA, 95616 text ZooKeys 2021 2021-04-02 1027 1 165 http://dx.doi.org/10.3897/zookeys.1027.54888 journal article http://dx.doi.org/10.3897/zookeys.1027.54888 1313-2970-1027-1 7D179ED7D7A540A2A972E07BC648F3B9 C5103AABD06058C595280B912CBE9B8B Ummidia erema (Chamberlin, 1925) Figs 64 , 65 , Map 5 Pachylomerus eremus Chamberlin, 1925d: 211; HOLOTYPE: 1 ♀ (IZ16003) from Barro Colorado Island, Panama Canal Zone, Panama, 9.1520 -79.8467 5, 156 m a.s.l., coll. WC Allee, deposited in the MCZ, examined. Diagnosis. Ummidia erema are relatively small spiders (CL 3.8-4.6) with distinctly light tarsi. Males can be distinguished from U. zilchi , U. carlosviquezi , U. varablanca , and U. quepoa by possessing a sinuous embolus, rather than one with an even single curve and from U. yojoa and U. varablanca by the presence of many prolateral (15 vs 0) and retrolateral (21 vs 2 or 3) spines on tibia I. Males can be further differentiated from U. rugosa and U. riverai by the lack of a pale dorsal heart patch on the abdomen. Females can be distinguished from all geographically proximate species except U. hondurena and U. rugosa by having spermathecae which bend first medially and then anteriorly. Figure 64. Ummidia erema (Chamberlin, 1925) from Barro Colorado Island, Panama. A male habitus illustration UMM535 B female habitus illustration MCZ16003. Scale bars: 4.0 mm. Description of female holotype. Specimen preparation and condition . Specimen preserved in 80% EtOH. Spermathecae removed, cleared, in vial with specimen General coloration . Carapace, chelicerae, and legs dark reddish brown 2.5YR 2.5/4, leg IV tarsi brownish yellow 10YR 6/8. Abdomen dark brown 2.5YR 3/2, spinnerets yellow 10YR 7/6. Cephalothorax . Carapace 3.79 long, 3.68 wide. Pars cephalica 2.83 long. Foveal groove procurved, 0.82 long, 0.3 wide. Eye tubercle moderate. AER procurved. PER relatively straight. Eye group 1 long, 0.58 wide, AME 0.22, PME 0.2, ALE 0.34, PLE 0.28. Sternum sparsely setose, thicker around anterior edges, STRl 2.32, STRw 2.25. Chelicerae with anterior row comprising three teeth, posterior margin with six teeth. Palpal endites with 27 large cuspules across proximal half of endite face and eleven cuspules distally, ENDw 0.95, ENDl 1.66. Labium with eight cuspules; five large and three small, LBw 0.9, LBl 0.63. Rastellum with six spines along distal cheliceral margin and five spines medially on process. Abdomen . Evenly setose. Legs . F1 2.88; F1w 0.99; P1 1.71; Ti1 1.66; Mt1 1.19; Tr1 0.82; F3 2.31; F3w 1.12; P3 1.33; Ti3 1.26, Sd3 0.87; Mt3 1; Tr3 0.98; F4 2.86; F4w 1.15; P4 1.46; Ti4 1.54; Mt4 1.19; Tr4 0.82. Retrolateral face tarsus IV with defined comb of alternating long and short spinules. Pedipalps . PF 2.66, PP 1.43, PTi 1.43, PTr 1.57. Spermathecae bent medially and then anteriorly, bulbs facing anteriorly. Variation, females (n = 3). CL 3.79-4.59, 4.16 +/- 0.23; CW 3.68-4.38, 3.95 +/- 0.21; Cap 2.83-3.31, 3.06 +/- 0.14; ENDl 0.58-0.65, 0.61 +/- 0.02; ENDw 0.98-1.06, 1.01 +/- 0.02; STRl 2.26-2.6, 2.39 +/- 0.11; STRw 2.25-2.67, 2.4 +/- 0.14; LBl 0.63-0.81, 0.74 +/- 0.06; LBw 0.9-1.05, 0.96 +/- 0.04; F1 2.51-3.11, 2.83 +/- 0.18; F1w 0.94-1.1, 1.01 +/- 0.05; P1 1.34-1.82, 1.62 +/- 0.15; Ti1 1.37-1.86, 1.63 +/- 0.14; Mt1 1.06-1.29, 1.18 +/- 0.07; Tr1 0.72-0.87, 0.8 +/- 0.04; F3 2.26-2.65, 2.4 +/- 0.12; F3w 1.12-1.27, 1.18 +/- 0.05; P3 1.18-1.5, 1.34 +/- 0.09; Ti3 1.25-1.38, 1.3 +/- 0.04; Mt3 0.92-1.12, 1.01 +/- 0.06; Tr3 0.98-1.09, 1.04 +/- 0.03; F4 2.78-3.24, 2.96 +/- 0.14; F4w 1.11-1.34, 1.2 +/- 0.07; P4 1.41-1.78, 1.55 +/- 0.12; Ti4 1.34-1.69, 1.52 +/- 0.1; Mt4 1.31-1.58, 1.45 +/- 0.08; Tr4 0.9-1.02, 0.95 +/- 0.04; PF 2.53-2.94, 2.71 +/- 0.12; PP 1.26-1.62, 1.44 +/- 0.1; PTi 1.42-1.58, 1.49 +/- 0.05; PTr 1.45-1.65, 1.56 +/- 0.06. Description of male exemplar. Specimen preparation and condition . Specimen preserved in 80% EtOH. Left palp and leg I removed, in vial with specimen. General coloration . Carapace, chelicerae, and legs reddish black 10R 2.5/1, tarsi reddish yellow 7.5YR 6/8. Abdomen black 5YR 2.5/1. Cephalothorax . Carapace 3.9 long, 3.83 wide. Pars cephalica 2.75 long. Foveal groove procurved, 0.31 long, 0.64 wide. Tubercle high. AER procurved. PER straight. Eye group 0.59 long, 1.03 wide, AME 0.35, PME 0.19, ALE 0.37, PLE 0.28. Sternum sparsely setose around outer 1/3, STRl 2.19, STRw 2.1. Chelicerae with anterior tooth row comprising five teeth, posterior margin with seven teeth. Palpal endites with 28 hastate cuspules of varying size across proximal 3/4 of endite face, lacking distal endite cuspules, ENDw 0.9, ENDl 1.5. Labium with ten cuspules, LBw 0.83, LBl 0.55. Rastellum greatly reduced with six small cuspules. Abdomen setose. Legs . F1 3.88; F1w 0.87; P1 1.88; Ti1 2.74; Mt1 1.83; Tr1 0.98; F3 2.95; F3w 1.07; P3 1.41; Ti3 1.72; Sd3 1.11; Mt3 1.46; Tr3 1.13; F4 3.74; F4w 0.98; P4 1.64; Ti4 2.19; Mt4 2.18; Tr4 1.23. Retrolateral face of tarsus IV lacking defined brush or comb. Leg I spination pattern: TSp 8, TSpv 7, TSrd 0, TSr 1, TSrv 20, MtSp 7, MtSr 13, TrSp 4, TrSr 7. Pedipalps . PTl 2.12, PTw 0.78, Bl 1.87. Embolus relatively long, slightly sinuous. Figure 65. Ummidia erema (Chamberlin, 1925) from Barro Colorado Island, Panama. A-D male exemplar (UMM535) A prolateral aspect, leg I B retrolateral aspect, leg I C line drawings, leg I prolateral and retrolateral aspects D retrolateral aspect, pedipalp E cleared spermathecae female holotype (MCZ16003). Scale bars: 1.0 mm. Variation, males. Known only from male exemplar. Material examined. Panama : Panama Canal Zone : Barro Colorado Island , 9.152 -79.8467 5, 156 m a.s.l. (MCZ1261, 1♀ , WC Allee , MCZ) (UMM0514, 1946, 1♀ , Zetek , AMNH) (UMM0512, 1.i.1947 , 1♀ , NLH Krauss, AMNH); (UMM0535, 18.iv.1946 , 1♂ , TC Schneirla , AMNH); Ft. San Lorenzo , 9.3227 -80.0014 4, 15 m a.s.l. (UMM0513, 1juv , Zetek , AMNH) .