Pagurixus pseliophorus Komai & Osawa, 2006

Osawa, Masayuki, Kawai, Takashi & Sakamaki, Takashi, 2013, New records of Pagurixus Melin, 1939 (Crustacea: Decapoda: Paguridae) from the Ryukyu Islands, southwestern Japan, with description of a new species, Zootaxa 3669 (3), pp. 350-366 : 356-357

Pagurixus pseliophorus Komai & Osawa, 2006

( Fig. 2E, F )

[Japanese name: Samidare-himehonyadokari]

Pagurixus pseliophorus Komai & Osawa, 2006: 85 , figs 36–40, 46A, 48 [type locality: Ara, Kume-jima, Ryukyu Islands, intertidal].— Okuno & Arima 2006: 37, fig. 3E.— Okuno 2008: 9, fig. 2.— McLaughlin et al. 2010: 32 (list), fig. 14H.

Material examined. Okinawa-jima: Benoki, Kunigami, intertidal, 30 Apr. 2010, coll. M. Osawa, 1 ovig. female (sl 2.7 mm), RUMF-ZC 2336 ; Benoki, Kunigami, intertidal, 6 Sep. 2012, coll. R . Yoshida, 2 males (sl 2.2 mm), 3 females (sl 2.3–3.2 mm), RUMF-ZC 2337 ; Zatsun, Kunigami, 0.5 m, 29 Aug. 2010, coll. M. Osawa, 1 male (sl 3.2 mm), 1 female (sl 3.0 mm), 2 ovig. females (sl 2.7, 3.4 mm), RUMF-ZC 2338 ; Zatsun, Kunigami, intertidal, 8 May 2012, coll. M. Osawa, 2 males (sl 2.4, 2.6 mm), 2 females (sl 1.7, 1.8 mm), 1 ovig. female (sl 1.8 mm), RUMF-ZC 2339 .

Coloration in life. The coloration of the present specimens agrees well with that of P. pseliophorus described by Komai & Osawa (2006, fig. 46A) and a photograph provided by Okuno & Arima (2006, fig. 3E). The color pattern of the carpus of the right cheliped is different between males and females. In females, the carpus has an irregular dark brown band on the median portion, whereas this band occupies the entire or almost the entire portion of the carpus in males. See Fig. 2E, F .

Distribution. Presently known only from the Ryukyu and Izu Islands, Izu Peninsula, and Kochi Prefecture in southern Japan; intertidal to 2 m ( Okuno 2008).

Habitat. Rocky reefs, usually under rocks, sometimes on the sides of large rocks.

Remarks. The previous record of P. pseliophorus from the Ryukyu Islands was based on the holotype and two paratypes from Kume-jima, which is currently the southern-most locality of the species. The present specimens were collected from Okinawa-jima, located slightly east to Kume-jima. On the rocky intertidal or shallow subtidal reefs in the northeastern coast of Okinawa-jima, P. pseliophorus is commonly found sympatrically with P. formosus and P. tweediei .

Figures

FIGURE 2. Entire animal, dorsal view. A, Pagurixus carinimanus Komai & Osawa, 2006, female (sl 1.7 mm), stn K 1-1, Kuchino-shima, RUMF-ZC 2328 (left cheliped and left second and third pereopods missing); B, Pagurixus formosus Komai, 2010, male (sl 2.9 mm), Benoki, Kunigami, Okinawa-jima, RUMF-ZC 2335; C, Pagurixus formosus Komai, 2010, male (sl 2.7 mm), “KUMEJIMA 2009” stn Dive 28, Kume-jima, RUMF-ZC 2334; D, Pagurixus tweediei (Forest, 1956), male (sl 2.5 mm), Zatsun, Kunigami, Okinawa-jima Island, RUMF-ZC 2342. (third pereopods missing); E, Pagurixus pseliophorus Komai & Osawa, 2006, male (sl 2.6 mm), Zatsun, Kunigami, Okinawa-jima, RUMF-ZC 2339 (right third pereopod missing); F, Pagurixus pseliophorus Komai & Osawa, 2006, ovig. female (sl 2.7 mm), Benoki, Kunigami, Okinawa-jima, RUMF-ZC 2336.