Ummidia macarthuri, 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 macarthuri sp. nov. Figs 16 , 17 , Map 3

Type material.

HOLOTYPE: 1 ♂ (UMM286) from Cove Creek, Washington County Arkansas, United States, 35.8167 -94.395 6, 583 m a.s.l., 13.x.1962, coll. O Hite, M Hite, AMNH.

Etymology.

The specific epithet is a patronym named in honor of Arkansas native General Douglas MacArthur.

Diagnosis.

Ummidia macarthuri males can be differentiated from U. rongodwini by lacking a pale dorsal heart patch and from U. audouini and U. rosillos by lacking a brush on the retrolateral face of tarsus IV. Comb on tarsus IV is less distinct than that of U. funerea and U. colemanae . Males can be differentiated from all geographically proximate species other than U. rongodwini by the lack of prolateral spines on tibia I. Males disperse from September to October.

Description of male holotype.

Specimen preparation and condition. Specimen preserved in 80% EtOH. Left palp, leg I removed, in vial with specimen. General coloration. Carapace and chelicerae dark reddish brown 2.5YR 2.5/2, legs yellowish red 5YR 4/6. Abdomen very dark brown 7.5YR 2.5/3. Cephalothorax. Carapace 4.91 long, 4.88 wide. Pars cephalica 3.24 long. Foveal groove procurved, 0.38 long, 0.92 wide. All eyes on moderate tubercle. AER procurved. PER straight. Eye group 0.64 long, 1.14 wide, AME 0.32, PME 0.17, ALE 0.38, PLE 0.22. Sternum sparsely setose around outer 1/3, thicker anteriorly, STRl 2.77, STRw 2.77. Chelicerae with anterior tooth row comprising five teeth, posterior margin with five teeth. Palpal endites with 18 small hastate cuspules spread across proximal half of endite face, lacking distal endite cuspules, ENDw 1.3, ENDl 2.01. Labium with six cuspules, LBw 1.01, LBl 0.71. Rastellum with many spines on process. Abdomen setose with pale speckles. Legs. F1 4.36; F1w 1.05; P1 2.13; Ti1 3.04; Mt1 2.05; Tr1 1.14; F3 3.12; F3w 1.32; P3 1.75; Ti3 2.01; Sd3 1.35; Mt3 1.8; Tr3 1.44; F4 4.31; F4w 1.28; P4 1.97; Ti4 2.66; Mt4 3; Tr4 1.79. Retrolateral face of tarsus IV with indistinct comb surrounded in setae. Leg I spination pattern: TSp 0, TSpv 0, TSrd 0, TSr 0, TSrv 5, MtSp 0, MtSr 4, TrSp 0, TrSr 4. Pedipalps. PTl 2.5, PTw 0.96, Bl 1.9. Embolus evenly curved.

Variation, males

(n = 9). CL 4.58-5.92, 5.21 ± 0.18; CW 4.67-5.94, 5.27 ± 0.17; Cap 3.09-3.96, 3.55 ± 0.12; ENDl 0.61-0.82, 0.73 ± 0.02;ENDw1.14-1.42, 1.27 ± 0.03; STRl 2.64-3.36, 3 ± 0.09; STRw 2.54-3.31, 2.9 ± 0.09; LBl 0.68-0.96, 0.82 ± 0.04; LBw 0.88-1.25, 1.06 ± 0.05; F1 4.31-5.39, 4.82 ± 0.15; F1w 1.05-1.4, 1.2 ± 0.04; P1 2.02-2.6, 2.32 ± 0.07; Ti1 2.73-3.61, 3.13 ± 0.11; Mt1 1.73-2.44, 2.1 ± 0.08; Tr1 1.06-1.28, 1.17 ± 0.02; F3 3.12-4.05, 3.55 ± 0.13; F3w 1.2-1.61, 1.4 ± 0.05; P3 1.57-2.08, 1.83 ± 0.06; Ti3 1.84-2.48, 2.09 ± 0.08; Mt3 1.66-2.18, 1.92 ± 0.06; Tr3 1.28-1.74, 1.59 ± 0.05; F4 4.3-5.36, 4.81 ± 0.16; F4w 1.16-1.56, 1.32 ± 0.05; P4 1.9-2.34, 2.1 ± 0.06; Ti4 2.66-3.39, 2.99 ± 0.11; Mt4 2.85-3.67, 3.21 ± 0.12; Tr4 1.59-2.14, 1.86 ± 0.06; TSp 0-1, 0.11 ± 0.11; TSpv 0-0, 0 ± 0; TSr 0-1, 0.11 ± 0.11; TSrv 4-8, 6 ± 0.47; PTl 2.48-2.95, 2.68 ± 0.07; PTw 0.93-1.13, 1.01 ± 0.02; BL 1.87-2.21, 2.04 ± 0.05.

Description of female exemplar.

Specimen preparation and condition. Specimen preserved in 80% EtOH. Spermathecae removed, cleared, in vial with specimen. General coloration. Carapace and posterior legs dark reddish brown 5YR 3/4, chelicerae and anterior legs dark reddish brown 2.5YR 2.5/4. Abdomen dark brown 10YR 3/3, spinnerets dark yellowish brown 10YR 4/4. Cephalothorax. Carapace 7.03 long, 7.57 wide. Pars cephalica 4.85 long. Foveal groove procurved, 0.59 long, 1.56 wide. Eye tubercle low. AER procurved. PER procurved. Eye group 1.08 long, 1.79 wide, AME 0.33, PME 0.3, ALE 0.58, PLE 0.32. Sternum sparsely setose around edges, thicker anteriorly, STRl 4.34, STRw 4.63. Chelicerae with anterior row comprising six teeth, posterior margin with six teeth. Palpal endites with 23 cuspules spread across proximal half of endite and 29 cuspules distally, larger anteriorly but smaller than proximal cuspules, ENDw 1.83, ENDl 3.07. Labium with five cuspules, LBw 1.76, LBl 1.37. Rastellum with many strong spines on process and up cheliceral face. Abdomen. Evenly setose with pale speckles creating light chevrons at apodemes. Legs. F1 4.83; F1w 1.76; P1 3.16; Ti1 3.01; Mt1 2.09; Tr1 1.22; F3 4.1; F3w 2.21; P3 2.56; Ti3 2.28, Sd3 1.45; Mt3 1.98; Tr3 1.89; F4 5.24; F4w 2.17; P4 2.79; Ti4 2.93; Mt4 3.26; Tr4 1.58. Retrolateral face tarsus IV with tight comb over middle half of article. Pedipalps. PF 4.37, PP 2.5, PTi 2.8, PTr 2.52. Spermathecae sinuous, curving strongly medially and posteriorly then anteriorly; bulbs facing medioanteriorly.

Variation, females

(n = 6). CL 3.85-8.12, 6.57 ± 0.62; CW 3.65-8.38, 6.53 ± 0.66; Cap 2.68-5.59, 4.53 ± 0.43; ENDl 0.55-1.19, 0.97 ± 0.1;ENDw0.92-2.05, 1.63 ± 0.16; STRl 2.08-4.77, 3.98 ± 0.41; STRw 2.25-5.3, 4.2 ± 0.46; LBl 0.66-1.63, 1.26 ± 0.15; LBw 0.87-1.91, 1.54 ± 0.16; F1 2.47-5.43, 4.51 ± 0.44; F1w 0.94-1.88, 1.58 ± 0.14; P1 1.53-3.34, 2.81 ± 0.27; Ti1 1.36-3.39, 2.7 ± 0.3; Mt1 0.98-2.41, 1.87 ± 0.21; Tr1 0.61-1.33, 1.05 ± 0.1; F3 2.18-4.46, 3.76 ± 0.34; F3w 1.13-2.61, 2.04 ± 0.21; P3 1.29-2.71, 2.32 ± 0.22; Ti3 1.12-2.64, 2.11 ± 0.22; Mt3 0.89-2.17, 1.74 ± 0.19; Tr3 0.99-2.09, 1.63 ± 0.16; F4 2.89-5.81, 4.89 ± 0.44; F4w 1.16-2.46, 1.94 ± 0.18; P4 1.42-3.1, 2.57 ± 0.25; Ti4 1.46-3.2, 2.67 ± 0.26; Mt4 1.47-3.53, 2.79 ± 0.31; Tr4 0.85-1.81, 1.44 ± 0.15; PF 2.19-4.79, 4.01 ± 0.39; PP 1.24-2.7, 2.31 ± 0.22; PTi 1.21-3.07, 2.47 ± 0.28; PTr 1.29-2.85, 2.32 ± 0.23.

Material examined.

United States: Arkansas: Washington Co: Cove Creek, 35.8167 -94.395 6, 583 m a.s.l. (UMM0259, 13.x.1962, 1♂, O Hite, M Hite, AMNH); (UMM0318, 3.xi.1962, 1♂, Hite, AMNH); (UMM0140, 3.xi.1962, 1♂, Exline, Peck , AMNH); Cove Creek , 35.8167 -94.395 6, 583 m a.s.l. (UMM0286, 13.x.1962, 1♂, AMNH) ; Illinois: Jackson Co: Carbondale, Union Hills, 37.6886 -89.2478 5, 145 m a.s.l. (UMM0269, 7.x.1969, 1♂, JKV Adams, AMNH); Little Grand Canyon , ca. 5.8 mi SW of Murphysboro, 37.6803 -89.3933 5, 209 m a.s.l. (UMM0264, 17.x.1970, 1♂, JA Beatty, AMNH) ; Indiana: Morgan Co: Morgan, Monroe State Forest , 39.3335 -86.4283 1, 275 m a.s.l. (UMM0739, 18.ix.2016, 1♂, M Milne, BME) ; Kentucky: Edmonson Co: Mammoth Cave National Park , 37.1852 -86.1001 6, 222 m a.s.l. (UMM0268, 16.ix.1966, 1♀, F Coyle, AMNH) ; Mississippi: Grenada Co: Grenada Ravine , 33.8966 -90.0294 1, 77 m a.s.l. (UMM0703, 23.x.1991, 1♂, GL Snodgrass, MEM); 33.6963 -90.03 1, 77 m a.s.l. (UMM0705, 28.viii.1991, 1♂, GT Baker, MEM); (UMM0704, 4.ix.1991, 1♂, M MacGown, J MacGown, MEM) ; Marshall Co: 3 mi S of Waterford , 35.5844 -89.4738 5, 96 m a.s.l. (UMM0722, 1.vi.1994, 1♀, PR Miller, MEM) ; Tate Co: Senatobia , NWCC, 34.6254 -89.9695 5, 91 m a.s.l. (UMM0725, 2.x.2006, 1♀, D Jones, MEM) ; Tennessee: Chester Co: Chickasaw State Park , 35.3606 -88.8618 5, 173 m a.s.l. (UMM0647, 9.ix.1966, 1♀, Coyle, AMNH) ; Davidson Co: Nashville , 36.1658 -86.7844 6, 165 m a.s.l. (UMM0621, 20.vi.1955, 1♀, AR Laskey, AMNH) ; Shelby Co: Cordova , 35.1558 -89.7774 5, 112 m a.s.l. (UMM0472, 3.v.1956, 1♀, AMNH) .

Figures

Map 3. Locality records for eastern United States species.

Figure 16. Ummidia macarthuri sp. nov. from Washington Co. Arkansas A male habitus illustration UMM 286 B female habitus illustration UMM 647. Scale bars: 4.0 mm.

Figure 17. Ummidia macarthuri sp. nov. from Washington Co. Arkansas A-D male holotype (UMM 286) 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 exemplar (UMM 647). Scale bars: 1.0 mm.