Ummidia taiwanensis, Tso & Haupt & Zhu, 2003

Tso, I-Min, Haupt, Joachim & Zhu, Ming-Sheng, 2003, The Trapdoor Spider Family Ctenizidae (Arachnida: Araneae) From Taiwan, Raffles Bulletin of Zoology 51 (1), pp. 25-33 : 28-29

Ummidia taiwanensis , new species

( Figs. 25 -42)

Material examined. – Holotype - male, Lugu Country, Nantou County, Taiwan, coll. Wen-Hao Chou, 29 Feb.1996 (NMNS- THU-Ar-01-0008).

Paratypes – 1 male, Lugu Country , Nantou County, Taiwan, coll. Wen-Hao Chou, 19 Aug.1997 ( ZMB 34999) ; 1 male, Manzhou Country , Pingdong County, Taiwan, coll. Hsueh-Wen Chang, Dec.1996 (NMNS-THU-Ar-00-0009) ; 1 female, Renai Country , Nantou County, Taiwan, 25 Aug.2000 , coll. I. M. Tso (NMNS- THU-Ar-00-0097).

Diagnosis. – Dark brown trap-door spider with round (male) or oval carapace (female) ( Fig. 25 ) resembling Ummidia fragaria ( Dönitz, 1887) . In male specimens on anterolateral side of 1st leg towards ventral side there are numerous short, stout bristles, especially on tarsus, metatarsus and tibia (Fig. 6). In U. fragaria the first leg of males lacks short, thick bristles ( Fig. 5 ). In the new species there are distal bristles on the cymbium (Figs. 13, 14) as compared to U. fragaria . In female specimens of the new species the globular reservoir of receptacles inserts at almost right angle at proximal tubular part (Fig. 24) as compared to an obtuse angle in U. fragaria ( Fig. 2 ).

Etymology. – Named after the type locality Taiwan.

Description of male holotype. – Total length, including chelicerae, 11.52; prosoma 6.48 long, 6.75 wide; opisthosoma 5.49 long, 4.68 wide. Carapace red brown or black purple, strongly sclerous, with numerous puncta and small ridges. Eight eyes in two rows, with the anterior eye row procurved and posterior row recurved from above, the former slightly wider than the latter; eye group 0.63 long, 1.39 wide; ALE-AME 0.18, AME-AME 0.10, PLE-PME 0.08, PME-PME 0.58; MOA 0.68 long, front width 0.68, back width 0.95; ALE: AME: PLE: PME (0.40: 0.33: 0.23: 0.18). Clypeus width 0.18.

Chelicerae with 8 teeth on inner margin and outer margin respectively (Fig. 9); rastellum conspicuous, consist of about 20 transverse-lined coniform spines, the first row with 9-10 spines (Fig. 8). rastellum is similar to that of female. Labium 0.85 long, 1.16 wide, cuspules reduced (Fig. 10). Coxae of palp (maxillae) 2.41 long, 1.39 wide; with about 20 cuspules ventrally; serrula absent (Fig. 10). Sternum yellowish brown, 3.42 long, 3.42 wide.

Coxae of legs yellowish brown ventrally. Legs with less and shorter thorn-like and normal spines. Trochanters I and II not notched. Tarsi I and II with narrower scopulae. Leg formula: 4123. Measurement of legs and palp:

I II III IV Palp Femur 4.14 3.78 3.24 4.32 3.51 Patella 2.61 2.52 2.25 2.52 2.16 Tibia 3.15 2.52 2.16 2.79 2.70 Metatarsus 2.74 2.16 1.84 3.42 — Tarsus 1.35 1.53 1.53 1.89 1.44 Total 13.99 12.51 11.02 14.94 9.81

Opisthosoma gray-black, with lots of yellow small spots, dorsal setae shorter and more slender than in female. PMS slender, PMS-PMS 1.4 times as wide as diameter of PMS. Palpal bulb elliptic, embolus pointed and slender, cymbium with 4 dagger-shaped spines at its top (Figs. 12-14).

Description of female. – Total length, including chelicerae, 14.22: prosoma 6.75 long, 6.39 wide; opisthosoma 7.65 long, 6.30 wide. Carapace black brown, black on its margins; glabrous, only with a few slender setae on eye tubercle and its back. Caput arched. Eye tubercle black and low. Fovea deep, strongly procurved and “U”-shaped (Fig. 15). Eight eyes in two rows (Fig. 16), with the anterior eye row procurved and posterior row recurved from above, equal in width; eye group 0.80 long, 1.60 wide; ALE-AME 0.18, AME-AME 0.13, PLE-PME 0.13, PME-PME 0.68; MOA 0.68 long, front width 0.88, back width 1.08; ALE: AME: PLE: PME (0.48: 0.40: 0.33: 0.20). Clypeus width 0.25.

Chelicerae black; inner margin with 4 teeth, outer margin with 7 teeth (Fig. 18); rastellum is similar to that of male (Fig. 17). Labium, coxae of palp (maxillae) and sternum black brown. Labium 1.18 long, 1.33 wide, with 14 conspicuous cuspules (Fig. 19). Coxae of palp (maxillae) 1.08 long, 1.26 wide, with about 53 conspicuous cuspules ventrally (Fig. 19). Sternum 3.87 long, 4.05 wide, with a large lunular sigilla at the center (Fig. 19).

Legs black brown, light-colored ventrally, with long and short brown sparse setae, tadpole-shaped and willow-leafshaped trichobothrial hairs besides the normal ones. Tibia III with a saddle-like depression dorsally (Fig. 21). Trochanters I and II distinctly notched (Fig. 20). Tibia and tarsus of palp, distal three segments of leg I and II with bands of short thorn-like spines laterally; palpal patella with 2-3 short thorn-like prolateral spines; tibia III with 3 prolateral and 2 retrolateral short thorn-like spines distally; metatarsus IV with 2 prolateral spines; tarsus IV with 3 distal short thornlike spines. Femur III thickest. Scopulae and claw tufts absent. Palpal claw with a single branched tooth; leg with 3 tarsal claws, paired claws with a row of teeth, occasionally with a denticle. Leg formula: 4123. Measurement of legs and palp:

I II III IV Palp Femur 4.14 3.60 2.25 4.23 3.60 Patella 2.61 2.52 2.16 2.61 2.25 Tibia 2.52 2.16 1.98 2.52 2.34 Metatarsus 1.62 1.44 1.53 2.25 — Tarsus 1.08 1.17 1.44 1.53 2.25 Total 11.97 10.89 9.36 13.14 10.44

Opisthosoma black purple, scattered with thick and slender black setae. Spinnerets brownish. PMS one-segmented, 0.61 long, PMS-PMS 0.20; PLS three-segmented, 0.68 long, thicker and shorter. Genitalia with a pair of spermathecae, each with a right-angled curve, and apical globe (Fig. 24).

Distribution. – Taiwan (Nantou County, Pingdong County).

Figures

Figs. 25-40. Latouchia formosensis smithi, new subspecies. 25-31, Male: 25. left chelicera, ventral view; 26. teeth of both cheliceral margins, ventral view; 27. left palp, ventral view; 28. left palp with embolus cap; 29. do., retrolateral view; 30. do., prolateral view; 31. left tibia II, prolateral view. 32-40, Female: 32. body, dorsal view; 33. carapace, lateral view; 34. eyes and clypeus; 35. left chelicera, ventral view; 36. teeth of both cheliceral margins, ventral view; 37. labium, coxa of left palp (maxilla) and sternum, ventral view; 38. distal end of tarsus I, prolateral view; 39. spinnerets, ventral view; 40. genitalia, dorsal view. (Scale bars: Figs. 32-33, 37 = 1mm; all the others = 0.5mm).

Figs. 1-5. Ummidia fragaria (Dönitz, 1887). 1-2, female. 1. female carapace, dorsal view; 2. genitalia, dorsal view; 3-5, male. 3. left palp, lateral view; 4. left palp, retrolateral view; 5. anterolateral side of first leg. (Scale bars = 1mm).