Garypus wilsoni Lin & Chang, 2022

Lin, Hsiang-Yun, Huang, Jun-Xuan, Liu, Hsi-Hsuan & Chang, Chih-Han, 2022, Tubuca paradussumieri, Zoological Studies 61 (24), pp. 1-13 : 3-6

Genus Garypus L. Koch

Garypus wilsoni Lin & Chang , sp. nov. ( Figs. 1A , 2 , 3, 4A, B ) urn:lsid:zoobank.org:act:83FD87FD-B660-43F5-85AF-E00A0BB2809A

Material examined: Holotype: ò; Checheng Township , Pingtung County, Taiwan; 22°04'59.5"N 120°42'03.4"E; coll. Bo-Xin Guo & Yi-Ting Chung; 15 Dec. 2020; GenBank: OL514114; NTUM-PSC-0001.

Etymology: The species is named after the late American biologist and naturalist Edward Osborne Wilson (1929‒2021) for his dedication to island biogeography and biodiversity.

Diagnosis: The species shares some common characters with G. necopinus Harvey and G. marmoratus Mahnert with trichobothrium st situated midway between sb and t or slightly closer to sb, tooth rows not touching each other when fingers of palps are closed, tergites mostly pale yellow in color with some brown spots. The three species can be differentiated by the color pattern of carapace and the shape of the galea and rallum.

Description: Color in ethanol ( Fig. 2 ). Chela finger red-brown, chelal hand brown, carapace and abdomen pale yellow, femur and patella of palp dark yellow, legs white, tergites VI ‒X mainly with 4 brown spots, 2 at lateral, 2 middle spot, tergites I‒ V with more brown color area near the middle spots.

Chelicera: Hand with 5 setae, movable finger with 1 distal setae; 1 lyrifissure present between interior setae and basal setae, another lyrifissure situated at the base of ventral side fixed finger; fixed finger with 7 teeth, first and 7th smaller than others, 1 tooth situated near galea on movable finger; galea ( Fig. 3E) with 4 rami; serrula exterior with 29 blades, serrula interior with 20 blades; rallum with 3 blades, the basal one shortest, each blades with small lateral spinules ( Fig. 3F).

Pedipalp ( Fig. 3A): Mostly lightly granulated, dorsal and ventral side of fingers smooth; 2 lyrifissure situated at basal part of patella; fingers slightly curved in lateral view ( Fig. 3D); ib and esb almost on the same horizontal plane, ist and isb also on the same horizontal plane, est to et as long as 1/2 distance of est to isb; et without adjacent patch of microsetae, with 8 microsetae near t, 4 microsetae clustered near both sb and b; venom apparatus present on both fingers; gaps present while fingers closed; fixed finger with 101 straight, triangular teeth, and movable finger with 85 round teeth.

Cephalothorax: Carapace triangular ( Fig. 4A, B ); 2 pairs of eyes, anterior eyes larger than lateral eyes; anterior and posterior furrow present; median maxillary lyrifissure situated at the 1/3 part from the apical of the palp coxa area; manducatory process with 5 setae, 18 setae on palp coxa; coxa setae arranged 6: 7: 12: 16.

Legs ( Fig. 3B, C): Metatarsi and tarsi not fused together in all legs, transverse structure present between metatarsi and tarsi; arolium shorter than claws; leg IV femur + patella 3.91× longer than deep.

Abdomen: Tergites I–X and sternites IV–X with median suture; setal row situated at bottom of tergites and sternites, tergites V ‒X and sternites III‒IX with many lyrifissure upon the setae row; tergites I‒XII setae arranged 8: 8: 9: 9: 12: 12: 10: 14: 12: 11: 12: 2, sternites IV‒XII setae arranged 9: 11: 12: 11: 12: 11: 10: 5: 2, setae on genitalia (sternite II) smaller than the setae on other sternites; pleural membrane without setae.

Genitalia: Ejaculatory duct atrium large and oval; duct of posterior dorsal gland long and bifurcate at distal with clavated shape ends; lateral genital sac long and slender; anterior genital operculum with 30 setae, posterior with 9 setae, not in a row.

Dimensions (in mm): Body length (excluding chelicerae) 4.31. Chelicera 0.34/ 0.17; movable finger length 0.31. Pedipalp: trochanter 0.68/0.44; femur 1.59/0.43; patella1.53/0.48; chela with pedicel 3.40/0.88; chela without pedicel long 3.27; hand without pedicel long 1.36; movable finger length 2.03. Carapace 1.43/1.34; anterior eye 0.16; posterior eye 0.10. Leg I: femur 0.67/0.23; patella 0.42/0.22; tibia 0.56/0.16; metatarsus 0.45/0.14; tarsus 0.31/0.11. Leg IV: femur + patella 1.29/0.33; tibia 1.09/0.18; metatarsus 0.48/0.14; tarsus 0.30/0.13.

Remarks: The specimen, a single male, was collected on the reef of the seashore area during ebb tide in the evening.

Distribution: Type locality (Checheng Township, Pingtung County, Taiwan).

Figures

Fig. 1. Photos of the holotypes of the two new species of Garypus. The photos were taken when the individuals were still alive. (A) Garypus wilsoni sp. nov. Lin & Chang (Photo by Bo-Xin Guo and Yi-Ting Chung with permission). (B) Garypus sanasai sp. nov. Lin, Huang & Chang.

Fig. 2. Garypus wilsoni Lin & Chang sp. nov. (A) dorsal view, (B) ventral view. Scale bar = 1 mm.

Fig. 4. Dorsal view of carapace and the comparison of color patterns of the two species. (A, B) Garypus wilsoni Lin & Chang sp. nov.; (C, D) Garypus sanasai Lin, Huang & Chang sp. nov.