Pseudoliomera lata ( Borradaile, 1902 )

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 : 115-116

publication ID	https://doi.org/ 10.50826/bnmnszool.50.3_97
persistent identifier	https://treatment.plazi.org/id/BA1287DB-A152-2522-2AF1-7112FBE4F9B0
treatment provided by	Felipe
scientific name	Pseudoliomera lata ( Borradaile, 1902 )
status

Treatment

Pseudoliomera lata ( Borradaile, 1902) View in CoL [Jn: Sango-awatsubu-modoki]

( Fig. 2A View Fig )

Actaea lata Borradaile, 1902, p. 254 View in CoL , fig. 53. — Odhner, 1925, p. 62, pl. 4 fig. 7. — Sakai, 1939, pp. 482 (in key), 489, pl. 93 fig. 7. — Guinot, 1962, p.236, figs. 3, 6, 9. — Deb, 1989, pp. 7 (in key), 24, fig. 27, pl. 5 fig. 1.

Pseudoliomera lata View in CoL : Guinot, 1967, p. 561 (in discussion); 1969, p. 228 (in discussion), fig. 13. — Sakai, 1976, p. 453 (in English), p.274 (in Japanese), pl. 160 fig. 1. — Serène, 1984, pp.99 (in key), 100 (in key), 102, fig. 61, pl. 13 fig. E. — Muraoka, 1998, p.42. — Maenosono, 2018, pp.21, 29 (in key), figs. 1C–D, 4.

Material examined. Chichi-jima Is. —Diving site Dobu-iso (27°05′24″N, 142°15′08″E), Chichi-jima I., 6–20 m, 1 young ♀ (NSMT-Cr 31694; cb 6.9×cl 5.1 mm), 1-VII-2014, H. Komatsu leg.

Haha-jima Is. —Diving site Blue ribbon (26°34′03″N, 142°12′48″E), Imoto-jima I., 12–14 m, 1 young ♂ (NSMT-Cr 31695; cb 10.4×cl 7.1 mm), 14-VII-2016, H. Komastsu leg.

Remarks. This species was described and recorded as Actaea lata by Borradaile (1902), Odhner (1925), Sakai (1939), Guinot (1962) and Deb (1989), and is known as Pseudoliomera lata by Sakai (1976), Serène (1984) and Maenosono (2018) after the suggestion of its close affinity to Pseudoliomera by Guinot (1967; 1969).

The male at hand is safely identified as this species due to having the carapace dorsal surface with distinctly isolated regions covered with pearly granules of good size and blackish setae. This specimen is uniformly dark brick red ( Fig. 2A View Fig ), differing from the photographs given by Maenosono (2018, fig. 1C–D), in which the carapace seems to be grayish and symmetrically mottled with brick red in both of the male and female specimens.

Distribution. Pseudoliomera lata has already been recorded from the Ogasawara Islands by Odhner (1925), and also the right cheliped obtained from stomach contents of slender emperor, Lethrinus variegatus Valenciennes , from the Ogasawara Islands was identified as that of P. lata by Takeda and Kurata (1977b). The type locality is Fadifolu Atoll in the Maldive Islands, with geographical distribution from Sri Lanka eastwards to the Tuamotu Islands and northward to the Mariana Islands and central Japan (cf. Holthuis, 1953; Guinot, 1962; Deb, 1989; Maenosono, 2018).

Pseudoliomera paraspeciosa ( Ward, 1941) View in CoL , comb. nov. [New Jn: Hanayaka-awatsubugani] ( Figs. 2H View Fig , 5A–C View Fig )

Actaea paraspeciosa Ward, 1941, p.9 View in CoL , figs. 11–12.

Nec Actaea paraspeciosa View in CoL : Ooishi, 1970, p.92, pl. 14 fig. 6. [= Pseudoliomera speciosa (Dana, 1852) View in CoL ]

Material examined. Chichi-jima Is. —Futami Bay, Chichi-jima I., on buoy, 1♂ (cb 9.7×cl 7.0 mm), 1♀ (cb 8.7×cl 6.2 mm), NSMT-Cr 6878, 17-V-1975, Y. Kurata leg.

Haha-jima Is. —Diving site Hirane (26°34′08″N, 142°12′49″E), Imoto-jima I., 20–25 m, 1 ♂ (NSMT-Cr 31696; cb 7.0×cl 4.8 mm), 14-VII-2016, H. Komatsu leg.

Remarks. This species originally described as Actaea is insufficiently known as yet, and was omitted from the monograph by Serène (1984), in which Dr. A. Crosnier recorded the brief comment that Takeda and Miyake (1976) considered the species as valid. Ward (1941) described Actaea paraspeciosa which was considered to be close to, but distinct from A. speciosa Dana, 1851 . Later, Guinot (1969) mentioned on the assumption that Actaea paraspeciosa is valid, and both species belong to the same genus, and that should be transferred to the genus Pseudoliomera Odhner, 1925 .

The present specimens identified as Pseudoliomera paraspeciosa are quite distinct from P. speciosa not only in the color in life, but also in the carapace dorsal areolation. In this species ( Figs. 2H View Fig , 5A View Fig ), the carapace dorsal surface is rather obscurely divided into regions by wide and shallow furrows, and covered with long hairs except for marginal regions, but in P. speciosa ( Fig. 2B View Fig ), the carapace is devoid of long hairs and the interregional furrows are narrow and sharply divide the regions. Otherwise, the dense setae surrounding the horny tip of the first ambulatory dactylus are unique to the two species in question, but the details are somewhat different in the two species. In P. speciosa , the setae at the distal part of the dactylus are cylindrically surrounding the horny tip, as finely illustrated by Guinot (1969, fig. 12), but in P. paraspeciosa , as seen in Fig. 5C View Fig , the bundle of setae appears to be rather depressed and flattened, not the form of round brush in P. speciosa .

Ward (1941) described this species as Actaea paraspeciosa based on five males and nine females from Mindanao, the Philippines, that were collected from the branches of living Acropora corals, sharing habitat with the Trapezia and Cymo crab species. Ooishi (1970) recorded this species from Hatsune-ura, Chichi-jima Island, with a photograph (pl. 14 fig. 6), and this record was adopted by Takeda and Komatsu (2023) in the checklist of the crabs from the Ogasawara Islands. However, at present, it is noted on close observation of the photograph given by Ooishi (1970), it should be referred to P. speciosa , not to P. paraspeciosa .

Distribution. Hitherto known only from the type locality, Mindanao, the Philippines.

Kingdom	Animalia
Phylum	Arthropoda
Class	Malacostraca
Order	Decapoda
Family	Xanthidae
Genus	Pseudoliomera