Stenohya huangi sp. n.

Hu, Jun-Fang & Zhang, Feng, 2012, Description of two new Stenohya species from China (Pseudoscorpiones, Neobisiidae), ZooKeys 213, pp. 79-91 : 83-86

Stenohya huangi sp. n. Figs 19-28

Type material.

Holotype female (Ps.-MHBU-FJ750224), China: Fujian Province, Fuzhou City, Gushan Mountain [26°04'N, 119°21'E], 24 February 1975, Fu-sheng Huang. Habitat unknown.

Etymology.

The specific name is a patronym in honour of Prof. Fu-Sheng Huang, who collected and donated the specimen.

Diagnosis.

Species with slender pedipalps (femur 6.40, patella 5.25, chela with pedicel 4.87, chela without pedicel 4.57 times as long as broad) and slender legs IV (e.g. femur+patella 7.23 times as long as deep), with low numbers of the teeth (about 30) on movable chelal finger; trichobothria it and et at same level.

Description of female (holotype)

(Fig. 19). Colour mostly yellow, setae of body straight and acicular.

Carapace (Fig. 20) smooth, with a total of 36 setae, including 6 on anterior margin and 8 on posterior margin; epistome small and triangular; 4 eyes, anterior pair with lens, posterior pair with weak lenses; lateral margins slightly convex.

Abdomen. Pleural membrane strongly granulate. Tergal chaetotaxy: 4: 12: 10: 10: 10: 10: 11: 11: 11: 10: 9, including at least 4 tactile setae on tergites VI–XI; anterior genital sternite (Fig. 27) with 22 small marginal setae and 2 lyrifissures; posterior genital sternite with 20 marginal setae and 2 lyrifissures; sternal chaetotaxy ( IV–XI): 27: 22: 22: 22: 24: 22: 19: 17:10, sternites VI–VIII (Fig. 28) with a pair of discal setae; anal cone with 2 dorsal and 2 ventral setae.

Pedipalps (Figs 21-22). Apex of coxa rounded and with 4 setae, lateral face of coxa with 2 ordinary lyrifissures at margin of foramen, and 2 curved lyrifissures. Anterior face of femur with fine granulation; patella claviform, smooth; chelal fingers long and slender. Trichobothriotaxy: est, et and it grouped together distally; ist situated midway between isb and it, nearer to it than to isb. eb and esb situated on base of the hand, grouped very closely with ib and isb; b and sb closer to each other situated on the basal half, and st and t closer to each other situated on the distal half of the movable finger. Fixed chelal finger with 63 pointed teeth of unequal length, movable finger with about 30 teeth which with 20 pointed teeth slightly unequal length in distal half, and 10 rounded teeth in basal half.

Cheliceral palm (Fig. 26) with 7 setae, movable finger with 1 sub-medial seta; fixed finger with 12 teeth; movable finger with 6 teeth; serrula exterior with 30 lamellae; serrula interior with 28 lamellae; galea (Fig. 25) elongated and divided into two main branches, each branch secondarily divided into 3 terminal branchlets; rallum of 8 blades (Fig. 24), all blades with anteriorly-directed spinules, the basalmost blade about half of the length of the others, distalmost blade distinctly shorter than second one and somewhat widened at its base.

Legs (Fig. 23). Tibia IV with 2 tactile setae (TS 0.70, 0.95), basitarsus IV with 2 tactile setae (TS 0.15, 0.81), and telotarsus IV with 2 tactile setae (TS 0.27, 0.61). Subterminal tarsal seta bifurcate; arolium not divided, shorter than slender and simple claws.

Dimensions (in mm) and ratios (in parentheses). Body length 4.2. Carapace 1.29/0.89 (1.45); diameter of anterior eye 0.10; diameter of posterior eye 0.09. Pedipalps: trochanter 0.59/0.26 (2.27), femur 1.58/0.25 (6.32), patella 1.38/0.26 (5.31), chela (with pedicel) 2.58/0.53 (4.87), chela (without pedicel) 2.42 (4.57), hand length (without pedicel) 1.04 (1.96), movable finger length 1.44 (1.38 times longer than hand without pedicel). Chelicera 0.67/0.38 (1.76), movable finger length 0.45. Leg I: femur 0.79/0.13 (6.08), patella 0.59/0.13 (4.54), tibia 0.63/0.10 (6.30), basitarsus 0.45/0.10 (4.50), telotarsus 0.43/0.10 (4.30). Leg IV: femur + patella 1.52/0.21 (7.24), tibia 1.22/0.12 (10.17), basitarsus 0.59/0.10 (5.90), telotarsus 0.79/0.10 (7.90).

Distribution.

This species is known only from the type locality.

Remarks.

Stenohya huangi sp. n. is only known from the female, but it can be easily separated from most other species of this genus by the proportions of pedipalpal femur and patella (Table 1). Two species, Stenohya xiningensis Zhao et al., 2011 and Stenohya kashmirensis ,are only known from males, while two others, Stenohya lindbergi and Stenohya vietnamensis are only known from nymphs. Stenohya huangi differs from Stenohya xiningensis by the arrangement of trichobothria on the fixed chelal finger: it and et are at the same level (Fig. 22) in Stenohya huangi , whereas in Stenohya xiningensis it lies about midway between est and et ( Zhao et al. 2011: fig. 28). Stenohya huangi differs from Stenohya kashmirensis and Stenohya lindbergi in having a lower number of teeth on the movable chelal finger (about 30, versus 70 in Stenohya kashmirensis and 78 in Stenohya lindbergi ). Finally, the new species differs from Stenohya vietnamensis in having an epistome.

In most Neobisiidae the lyrifissures near the trochanteral foramen of the pedipalpal coxa number 3 or 4 ( Chamberlin 1931). Having examined the arrangements of lyrifissures in Stenohya pengae sp. n., Stenohya huangi sp. n., Stenohya curvata and Stenohya xiningensis , we found all of them have 2 lyrifissures in this position. The males of Stenohya pengae sp. n. possess 4-5 lyrifissures behind the foramen and 2-3 dorsal lyrifissures, while females have 3-5 lyrifissures near the foramen and 0-3 dorsally (Fig. 15). Males of Stenohya curvata have 7 lyrifissures near the foramen ( Zhao et al. 2011: fig. 3) and females have 5, but there are no dorsal lyrifissures. The male of Stenohya xiningensis (female unknown) has 6 foramenal lyrifissures and 1 dorsal lyrifissure (Fig. 9).