Lupocyclus tugelae Barnard, 1950

Huang, Yu-Hsuan & Shih, Hsi-Te, 2021, Chthonius rhodochelatus Hadzi 1933, Zoological Studies 60 (60), pp. 1-45 : 14-16

Lupocyclus tugelae Barnard, 1950 ( Figs. 3D , 8 )

Lupocyclus rotundatus – Sakai 1939: 382, pl. 80(5) ( Japan: Shimada and Nagasaki). (not Lupocyclus rotundatus Adams & White, 1849 )

Lupocyclus tugelae Barnard, 1950: 148 , figs. 29e–h (type locality: Tugela River mouth, South Africa); Sakai 1976: 352, pl. 121(2) ( Japan: Sagami Bay, Shimada, Tosa Bay and Nagasaki); Dai and Xu 1991: 18, fig. 14 (Nansha Is.); ZG Huang 1994: 585 (list; Taiwan Strait; Nansha Is.); Ng et al. 2008: 151 (list); Yang et al. 2012: 117, fig. 43, pl. 8(6) ( China; Nansha Is.); Sasaki 2019: 8923 (list).

Material examined: Taiwan: 1 male (17.5 × 13.1 mm), 1 ovig. female (15.8 × 12.1 mm) (NCHUZOOL 16560), Erzihliao Fishing Port, Kaohsiung, coll. YH Huang, 4 Apr. 2019; 1 female (14.1 × 10.7 mm) (NCHUZOOL 16593), Erzihliao Fishing Port, Kaohsiung, coll. YH Huang, 9 Feb. 2019.

Diagnosis: Carapace subhexagonal, slightly broader than long, surface with granular patches and pilose. Frontal, metagastric and cardiac ridges absent; protogastric and mesogastric regions each with a pair of faintly granulated ridges; epibranchial regions with a pair of granulated ridges; mesobranchial regions with 2 pairs of faintly granulated ridges. Front protruding with 4 teeth, median 2 teeth more protruding than lateral ( Fig. 8A ). Orbit slightly as broad as front; supraorbital margins with 2 notches ( Fig. 8A ). Anterolateral margins with 9 teeth, surface granulated, teeth 2, 4, 6, 8 smaller than others, tooth 1 largest ( Fig. 8A ). Chelipeds slender with surface densely pilose; merus with surface squamous, 5 spines on inner margin, 2 on outer margin; carpus with 4 granulated ridges on dorsal surface, 1 spine each on inner and outer margins; palm with 2 granulated ridges and 3 spines on dorsal surface, 3 ridges on outer surface, 1 ridge on inner surface, ventral surface squamous. P5 with merus having a spine on inner margin; propodus slender, longer than broad. Male pleon with pleomere 6 trapezoidal, telson longer than broad. G1 with distal part curved laterally, tip slender with spines on mesial side ( Fig. 8B–E ).

Distribution: New Caledonia; Australia (western); Indonesia ( Ambon; Talaud Archipelago; Makassar); Philippines; Nansha Is.; Taiwan (Erzihliao Fishing Port, Kaohsiung; Fig. 1 : no. 7); Japan (Sagami Bay; Tosa Bay; Nagasaki); China (incl. Hainan I.); Red Sea; Kenya; Madagascar; South Africa (Tugela River mouth) ( Sasaki 2019; this study).

Ecological notes: The habitats are composed of mud, muddy-sand or broken shells at 14–174 meters deep ( Yang et al. 2012).

Remarks: Lupocyclus tugelae Barnard, 1950 can be distinguished from Luu. inaequalis by the following characters: (1) carapace with granular patches in Luu. tugelae ( Fig. 8A ) (vs. granulated ridges on mesogastric, metagastric, cardiac and mesobranchial regions in Luu. inaequalis ; Fig. 7A ); (2) G1 curved laterally at 1/3 from tip, tip with spines on mesial side in Luu. tugelae ( Fig. 8B–E ; Yang et al. 2012: fig. 43g) (vs. G1 curved at 1/2, tip with spines on dorsal side in Luu. inaequalis ; Fig. 7B–E ; Yang et al. 2012: fig. 39e). ZG Huang (1994) has included Luu. tugelae from the Taiwan Strait, however

5 mm

Ng et al. (2017) excluded this record from Taiwan, because of the unclear locations. As a result, this is the first confirmed record of Luu. tugelae from Taiwan.

Figures

Fig. 3. Species of the family Portunidae. A, Carupa ohashii Takeda, 1993, female (34.9 × 23.1 mm) (NCHUZOOL 16500), Dongsha I.; B, Lupocycloporus minutus (Shen, 1937), male (17.5 × 9.7 mm) (NCHUZOOL 16534), Zuoying, Kaohsiung; C, Lupocyclus inaequalis (Walker, 1887), male (21.6 × 16.3 mm) (NCHUZOOL 16551), Erzihliao Fishing Port, Kaohsiung; D, Lupocyclus tugelae Barnard, 1950, male (17.5 × 13.1 mm) (NCHUZOOL 16560), Erzihliao Fishing Port, Kaohsiung; E, Podophthalmus minabensis Sakai, 1961, male (25.2 × 14.9 mm) (NCHUZOOL 16499), Dalinpu, Siaogang, Kaohsiung; F, Monomia gladiator (Fabricius, 1798), male (53.0 × 31.2 mm) (NCHUZOOL 16506), Erzihliao Fishing Port, Kaohsiung; G, Monomia lucida Koch & Ďuriš, 2018, male (54.8 × 30.7 mm) (NCHUZOOL 16538), Erzihliao Fishing Port, Kaohsiung; H, Xiphonectes tuberculosus (A. Milne-Edwards, 1861), males (24.3 × 14.3 mm) (NCHUZOOL 16530), Zuoying, Kaohsiung.

Fig. 8. Lupocyclus tugelae Barnard, 1950, male (17.5 × 13.1 mm) (NCHUZOOL 16560). A, carapace; B–E, right G1; B, C, dorsal view; D, E, ventral view.

Fig. 1. Taiwan main island and adjacent islets, with the collection localities shown in gray circles (see Table 1).

Fig. 7. Lupocyclus inaequalis (Walker, 1887), male (21.6 × 16.3 mm) (NCHUZOOL 16551). A, carapace; B–E, right G1; B, C, dorsal view; D, E, ventral view.