Paractaea rufopunctata (H. Milne Edwards, 1834 )

Tune, K Noelle, Zachrison, Kori S, Pines, Jesse M, Zheng, Hui & Hayden, Emily M, 2024, A New and Some Rare Crabs of the Families Trapeziidae, Oziidae and Xanthidae (Crustacea: Decapoda: Brachyura) from the Ogasawara Islands, Japan, Bulletin of the National Museum of Nature and Science. Series A, Zoology 50 (3), pp. 97-122 : 114-115

Paractaea rufopunctata (H. Milne Edwards, 1834) [Jn: Shin-kebuka-awatsubu-modoki]

( Fig. 5F )

Xantho rufopunctatus H. Milne Edwards, 1834, p.389 .

Actaea rufopunctata : A. Milne-Edwards, 1865, p.268, pl. 18 fig. 1. — Heller, 1863, p.70. — Alcock, 1898, p. 142. — Serène & Bui, 1959, p.291, fig. 1F. — Guinot, 1964, p. 36.

Actaea rufopunctata rufopunctata : Holthuis & Gottlieb, 1956, p.287, pl. 4 fig. 1.

Paractaea rufopunctata rufopunctata : Guinot, 1969, p. 246, figs. 19–20. — Sakai, 1976, p.449 (in English), p. 272 (in Japanese), fig. 240a. — Miyake, 1983, pp.119, 229 (in list), pl. 40 fig. 1. — Serène, 1984, pp.119 (in key), 121 (in key), 122, fig. 72, pl. 16 fig. A.

Paractaea rufopunctata : Poupin et al., 2018, p.60, fig. 16M.

Material examined. Chichi-jima Is. —Miyanohama, Chichi-jima I., 1 ovig. ♀ (NSMT-Cr 6551; cb 28.2×cl 19.2 mm), 1-VII-1976, M. Takeda leg.

Remarks. Guinot (1969) established a new genus Paractaea with the type species, Xantho rufopunctatus H. Milne Edwards, 1834 , and Actaea retusa Nobili, 1906 , A. garretti Rathbun, 1906 , A. sulcata Stimpson, 1860 , and A. nodosa Stimpson, 1860 , and described four new species, P. excentrica from the Tuamotu Islands, P. secundarathbunae from Hawaii, P. monodi from the Atlantic and the Mediterranean, and P. rebierei from Mauritius. In the paper, Paractaea rufopunctata was treated as a nominate subspecies, and seven formas were distinguished in P. rufopunctata , viz. illusoria nov., plumosa nov., primarathbunae nov., tertiarathbunae nov., intermedia nov., africana nov. and nodosa (Stimpson, 1860) . Later, Serène (1984) also established three additional formas, viz. frontalis nov., waltersi nov. and sanctaeluciae nov. Most of these names established as infrasubspecific taxa are, as mentioned by Ng et al. (2008), invalid nomenclaturally. Of them, only plumosa was validated by Sakai (1976) at the subspecies rank as P. rufopunctata plumosa .

The specimen at hand ( Fig. 5F ) is typical in the general carapace shape and sculpture as the Paractaea species. The carapace is transverse and convex, with the dorsal surface deeply sculptured into areolae. The following carapace areolation is characteristic for P. rufopunctata : 2M is distinctly subdivided into two, the outer lobule of which is apparently longer than the inner lobule and reaches posteriorly to the anterolateral corner of 3M; the anterior extension of 3M is short and narrow, attaining the half of the inner lobule of 2M; the main part of 3M is prominent and imperfectly subdivided into two by a longitudinal furrow behind the anterior extension of 3M; the anterolateral corner of 3M is obtusely angulated; 1P is heart-shaped; 5L is notched at the median part of the anterior margin.

Distribution. Widely distributed in the whole Indo-West Pacific, from the Red Sea and South Africa, western Indian Ocean, to French Polynesia, Hawaii and Japan in the South, Central and West Pacific.

Pseudoliomera hellerii (A. Milne-Edwards, 1865) [Jn: Marumi-awatsubugani] ( Figs. 2C–D , 5H )

Actaea hellerii A. Milne-Edwards, 1865, p.270 , pl. 17 fig. 3. — Rathbun, 1911, p. 221, pl. 18 fig. 2. — Deb, 1989, pp. 7 (in key), 22, fig. 28, pl. 3 fig. 10.

Actaea helleri : Odhner, 1925, p. 77, fig. 7. — Sakai, 1939, pp. 481 (in key), 485. — Ooishi, 1970, p.93, pl. 14 fig. 8.

Pseudoliomera helleri : Guinot, 1969, p.228, fig. 7. — Sakai, 1976, p.452 (in English), fig. 243, p.274 (in Japanese). — Serène, 1984, pp.99 (in keys), 100, fig. 57, pl. 13 fig. B. — Dai et al., 1986, p.295, fig. 163, pl. 41 fig. 3. — Dai & Yang, 1991, p.318, fig. 163, pl. 41 fig. 3. — Takeda & Webber, 2006, p. 212, fig. 9C–D.

Pseudoliomera hellerii : Takeda & Kurata, 1976, p.131, fig. 2j. — Maenosono, 2018, pp.18, 29 (in key), figs. 1B, 3.

Material examined. Chichi-jima Is. —Diving site Dobu-iso (27°05′24″N, 142°15′08″E), Chichi-jima I., 6–20 m, 1 ♀ (NSMT-Cr 31683; cb 18.3×cl 12.3 mm), 1-VII-2014, H. Komatsu leg.

Haha-jima Is. —Diving site Shihon-iwa North (26°38′56″N, 142°08′37″E), Haha-jima I., 1 ♂ (NSMT-Cr 31684; cb 12.3×cl 8.0 mm), 2-VII-2015, H. Komatsu leg. ; Diving site Shihon-iwa South (26°38′49″N, 142°08′36″E), Haha-jima I., 1 ♂ (cb 9.0×cl 5.8 mm), 2 juvs (cb 3.5×cl 3.1 mm; cb 4.2×cl 3.3 mm), NSMT-Cr 31685, 3-VII-2015, H. Komatsu leg. ; Same place, 1 ♀, shell after ecdysis (NSMT-Cr 31686; cb 11.5×cl 7.5 mm), 6-VII-2015, H. Komatsu leg. ; Diving site Sasao-ne (26°35′07″N, 142°09′45″E), Hira-shima I., 1 ♂ (NSMT-Cr 31687; cb 16.1×cl 10.8 mm), 1 ♂ (NSMT-Cr 31688; cb19.5×cl 13.5 mm), 3-VII-2015, H. Komatsu leg. ; West coast of Mei-jima I. (26°34′08″N, 142°13′40″E), 10 m, 1 juv. (NSMT-Cr 31689; cb 4.3×cl 3.3 mm), 11-VII-2016, H. Komatsu leg. ; Diving site Blue ribbon (26°34′03″N, 142°12′48″E), Imoto-jima I., 15-17 m, 1 ♂ (NSMT-Cr 31690; cb 5.3×cl 3.6 mm), 11-VII-2016, H. Komatsu leg. ; Diving site Uentoro (26°39′28″N, 142°10′35″E), Haha-jima I., 14–20 m, 4 juvs (cb 4.2×cl 3.2 mm —cb 5.7×cl 4.2 mm), NSMT-Cr 31691, 12-VII-2016, H. Komatsu leg. ; Diving site Blue ribbon , Imotro-jima I., 12-14 m, 1 juv. (NSMTCr 31692; cb 6.6×cl 4.5 mm), 14-VII-2016, H. Komatsu leg. ; Diving site Hirane (26°34′08″N, 142°12′49″E), Imoto-jima I., 20-25 m, 1 juv. (NSMT-Cr 31693; cb 4.2×cl 3.4 mm), 14-VII-2016, H. Komatsu leg.

Remarks. This species is characteristic in 1) the carapace covered with many short setae and small pearly granules ( Figs. 2C , 5H ), 2) the shallow interregional furrows, with the imperfectly subdivided 2M, and the undivided 1–3L ( Fig. 5H ), and 3) the heavy chelipeds ( Fig. 2D ).

Distribution. Red Sea, Indian Ocean, and western Pacific Ocean (cf. Odhner, 1925).

Figures

Fig. 5. A–C: Pseudoliomera paraspeciosa (Ward),Ə (NSMT-Cr 31696; cb 7.0×cl 4.8mm) from Imoto-jima, dorsal (A) and ventral views (B), and dactylus of right first ambulatory leg, showing tuft of setae (C). D: Liocarpilodes harmsi (Balss),Ə (NSMT-Cr 31671; cb 5.2×cl 3.6mm) from Miyano-hama, Chichi-jima. E: Paractaea retusa (Nobili), ovig.8 (NSMT-Cr 6877; cb 17.0×cl 10.7mm) from Futami Bay, Chichi-jima. F: Paractaea rufopunctata (H. Milne-Edwareds), ovig.8 (NSMT-Cr 6551; cb 28.2×cl 19.2mm) from Miyano-hama, Chichijima. G: Pseudoliomera variolosa (Borradaile),8 (NSMT-Cr 31698; cb 7.6×cl 5.7mm) from Mukou-jima. H: Pseudoliomera helleri (A. Milne-Edwards),Ə (NSMT-Cr 31688; cb 19.5×cl 13.5mm) from Haha-jima.

Fig. 2. A: Pseudoliomera lata (Borradaile), young Ə (NSMT-Cr 31695; cb 10.4×cl 7.1mm) from Imoto-jima. B: Pseudoliomera speciosa (Dana), Ə (NSMT-Cr 31697; cb 7.2×cl 5.5 mm) from Chichi-jima. C–D: Pseudoliomera hellerii (A. Milne-Edwards), Ə (NSMT-Cr 31688; cb 19.5×cl 13.5mm) from Hira-shima, dorsal (C) and ventral (D) views. E–F: Liomera rubra (A. Milne-Edwards), Ə (NSMT-Cr 31681; cb 18.2×cl 10.8mm) from Haha-jima (E), and juv. (photograph only), from Haha-jima (F). G: Pseudoliomera variolosa (Borradaile), 8 (NSMT-Cr 31698; cb 7.6×cl 5.7mm) from Mukou-jima. H: Pseudoliomera paraspeciosa (Ward), Ə (NSMT-Cr 31696; cb 7.0×cl 4.8mm) from Imoto-jima.