Zozymodes pumilus ( Hombron and Jacquinot, 1846 )

Alrasheedi, Sami M, Alrashdi, Mousa N, Alhumaidan, Lama S, Alkhdairi, Ahmad, Alzweihary, Ali M, Alhussaini, Omar M, Alharbi, Lama S, Albalawi, Amirah N, Almutairi, Turki F, Alharbi, Osama A G & Bashal, Afaf A M, 2024, Crabs of the Families Tetraliidae, Trapeziidae and Xanthidae (Crustacea: Decapoda: Brachyura) new to the Ogasawara Islands, Japan, Bulletin of the National Museum of Nature and Science. Series A, Zoology 50 (1), pp. 1-17 : 13

Zozymodes pumilus ( Hombron and Jacquinot, 1846)

[Jn: Guamu-eriashi-ougigani]

( Fig. 4B )

Material examined. Chichi-jima Is.—Nishijima I., 1 ♂ (cb 6.0×cl 4.1 mm), 5 ovig.♀♀(cb 6.4×cl 4.5 mm —cb 7.3×cl 5.4 mm), NSMT-Cr 31549, 1 ♀ (NSMT-Cr 31550; cb 8.5×cl 6.1 mm), 29-VI-1976, M. Takeda leg.

Remarks. This species is small, but was recorded with good figures by the original authors ( Hombron and Jacquinot, 1846, pl. 4 fig. 1, as Zozymus ), Miyake (1939, fig. 5, pl. 13 fig. 2), Forest and Guinot (1961, fig. 36), Sankarankutty (1962, figs. 5–9), Guinot (1968, figs. 33, 35), Takeda and Miyake (1968, pl. 1 fig. A), Serène (1984, fig. 90, pl. 19 fig. E), Lasley and Ng (2013, fig. 4C–D), and Maenosono (2022c, figs. 13E–F, 14). Otherwise, this species was described and figured as Leptodius (Xanthodius) cristatus n. sp. by Borradaile (1902, fig. 51), and later, recorded as Leptodius cristatus by Rathbun (1911, pl. 17 fig. 9). The G1 is represented by Miyake (1939, fig. 5), Forest and Guinot (1961, fig. 90), Sankarankutty (1962, fig. 9), Guinot (1968, fig. 35), and Serène (1984, fig. 90).

The carapace dorsal surface is thickly covered with minute granules of uniform size and divided into the weakly raised regions; the anterolateral margin is divided into bluntly crested four teeth, of which the first two are lobate and the last two are obtusely angulated at the tips situated somewhat anteriorly. The chelipeds are stout, similar in shape, but different in size, with a short crest at the carpus inner upper margin and two rows of crests on the upper margin of each palm. Each carpus and propodus of the ambulatory legs are equipped with a deep cavity surrounded by two sharp crests. The relations among the known species including the present species were well discussed by Lasley and Ng (2013) who described the distinct new species, Z. sculptus , from Guam.

Distribution. Widely distributed in the Indo-West Pacific from Madagascar in the western Indian Ocean eastwards to the Tuamotu Islands in the South Pacific and northwards to the Ryukyu Islands in the West Pacific.

Figures

Fig. 4. A: Paraxanthias parvus (Borradaile), ovig.♀(NSMT-Cr 31538; cb 8.5×cl 5.6mm) from Nishi-jima. B: Zozymodes pumilus (Hombron and Jacquinot), ♀ (NSMT-Cr 31550; cb 8.5×cl 6.1mm) from Nishi-jima. C–D: Pseudoliomera remota (Rathbun), ♂ (NSMT-Cr 31544; cb 6.9×cl 5.0mm) from Miyano-hama, Chichi-jima.