Paguristes granulata, Asakura, 2000

Osawa, Masayuki & Fujita, Yoshihisa, 2019, Submarine cave hermit crabs (Crustacea: Decapoda: Anomura: Paguroidea) from three islands of the Ryukyu Islands, southwestern Japan, Zootaxa 4560 (3), pp. 463-482 : 474-475

Pylopaguropsis granulata Asakura, 2000

( Figs. 3C , 5 C–E)

Pylopaguropsis granulata Asakura, 2000: 100 , figs. 16–18, 19F, 20 (type locality: Kume Island, Ryukyu Islands) .

Material examined. Okinawa Island, Hedo Dome cave: silty room , 21 May 2017, 1 female (sl 4.8 mm), RUMF- ZC-6052 (HD 2017-31) .

Distribution. Ryukyu Islands (Okinawa Island and Kume Island) in southwestern Japan; 10–15 m ( Asakura 2000; present study).

Habitat. Coral reefs ( Asakura 2000).

Remarks. Pylopaguropsis granulata was described by Asakura (2000) based only on the male holotype. McLaughlin et al. (2010) showed a color photograph of the second specimen of the species from the Ryukyu

Islands. The specimen herein reported represents the third record and a first female collected of this poorly known species.

There are some differences between the holotype and the specimen examined. The right chela is more elongate in the holotype than the present specimen; measured on the lateral margin, 1.5 versus 1.4 times longer than broad (cf. Asakura 2000: fig. 17A; Fig. 5C ). The ventrolateral margin of the merus of each ambulatory leg is unarmed in the holotype, whereas it has two (second pereopod) and one (third pereopod) small spines on the distal half in the present specimen ( Fig. 5D, E ). The dorsal margin of the carpus of the third pereopod is also unarmed except for a distal spine in the holotype, but it has two very small spines on the proximal half in the present specimen ( Fig. 5E ).

Figures

FIGURE 3. Entire animal, dorsal view. A, Pylopaguropsis bellula Osawa & Okuno, 2007, male (sl 4.1 mm), RUMF-ZC-6042 (IE17); B, Pylopaguropsis fimbriata McLaughlin & Haig, 1989, ovigerous female (sl 4.4 mm), RUMF-ZC-6046 (IE179); C, Pylopaguropsis granulata Asakura, 2000, female (sl 4.8 mm), RUMF-ZC-6052 (HD2017-31); D, Pylopaguropsis keijii McLaughlin & Haig, 1989, male (sl 1.9 mm), RUMF-ZC-6055 (HD2017-87); E, Pylopaguropsis speciosa McLaughlin & Haig, 1989, ovigerous female (sl 3.7 mm), RUMF-ZC-6058 (SH104).

FIGURE 5. Pagurixus nomurai Komai & Asakura, 1995: female (sl 5.0 mm), RUMF-ZC-6038 (HD2017-65) (A, B); Pylopaguropsis granulata Asakura, 2000: female (sl 4.8 mm), RUMF-ZC-6052 (HD2017-31) (C–E); Pylopaguropsis keijii McLaughlin & Haig, 1989: male (sl 1.9 mm), RUMF-ZC-6055 (HD2017-87) (F). A, carpus of left cheliped, dorsal view; B, dactylus and propodus of left third pereopod, lateral view; C, right chela, dorsal view; D, carpus and merus of left second pereopod, lateral view; E, carpus and merus of left third pereopod, lateral view; F, propodus of right third pereopod, lateral view. Setae omitted from all illustrations. Scales equal 1.0 mm.