Lophoplax sextuberculata Takeda and Kurata, 1984

Shaga, I Bevin, Priya, K, Ramar, Selvakumar, Srinidhi, S, Mohan, G Chandra, Ranganathan, Sukanya, Moulvi, S M M & Mani, Bhuvaneswari, 2023, A Small Collection of Subtidal Crabs (Crustacea: Decapoda: Brachyura) from the Palau Islands Collected by Dredging, Bulletin of the National Museum of Nature and Science. Series A, Zoology 49 (1), pp. 7-42 : 28-30

publication ID

https://doi.org/ 10.50826/bnmnszool.49.1_7

persistent identifier

https://treatment.plazi.org/id/1B153E3A-FF90-FFAC-F1E5-CD345877FC78

treatment provided by

Felipe

scientific name

Lophoplax sextuberculata Takeda and Kurata, 1984
status

 

Lophoplax sextuberculata Takeda and Kurata, 1984 View in CoL

( Fig. 9C)

Lophoplax sextuberculata Takeda and Kurata, 1984, p. 200 View in CoL , figs. 14–16.ʕTakeda and Marumura, 1995b, p. 87, fig. 1. ʕ Marumura and Kosaka, 2003, p. 47, pl. 7 fig. 41.ʕ Takeda and Komasu, 2018, 176, fig. 6H.

Lophoplax aff. sextuberulata Takeda and Kurata : Takeda and Marumura, 1995a, p. 4, pl. 1 figs. 7–8.

Material examined. Entrance to Toagel Mid in Arangel Channel, Babelthuap I., Palau Is., dredged, 30–40 m in depth, with coralline algae; 1 ovig.8 (cb 5.2×cl 4.0 mm), NSMT-Cr 30992; June 19, 1980; K. Baba leg.

Remarks. This small ovigerous female agrees well with the female holotype and two male paratypes found in stomach contents of roundspot goatfish/sidespot goatfish, Parupeneus pleurostigma (Bennett) from the Ogasawara Islands. In the original description, otherwise, a male from Tanega-shima Island in the south of Kyushu was also recorded as the paratype. In the specimens from the Ogasawara Islands as well as the present ovigerous female, the carapace dorsal surface is ornamented only with a transverse row of six, weakly raised, bare areolets behind the front-orbital margin. Takeda and Marumura (1995b), however, mentioned on the variations of the areolets on the carapace dorsal surface in three Japanese localities. In the specimens from the Kii Peninsula and Tanega-shima Island, the carapace dorsal surface is ornamented, in addition to six areolets behind the front-orbital margin, with two transverse rows of four and three areolets at level of the gastric and cardiac regions, respectively; in a female from Ie-jima Island in the Ryukyu Islands, it is almost impossible to locate the posterior seven areolets.

The carapace anterolateral margin is armed with three tubercular teeth tipped each with a short stiff seta; the third tooth is similar to, but much smaller than the first and second teeth.

The genus Lophoplax is composed of L. bicristata Tesch, 1918 , L. sculpta ( Stimpson, 1858) , L. takakurai Sakai, 1935 , and L. sextuberculata Takeda and Kurata, 1984 , because L. teschi Serène, 1971 was transferred to Serratocoxa Ng, 1987 and then to Cryptolutea Ward, 1936 (Ng et al., 2008). Takeda and Kurata (1984) and Takeda and Marumura (1995b) considered that Pseudocryptocoeloma symmetrinudus Edmondson, 1951 , is to be transferred to Lophoplax , but at present, Pseudocryptocoeloma is considered to be generically distinct from Lophoplax , with two species, P. parvus Ward, 1936 (type species) from Queensland, Australia, and P. symmetrinudus from Samoa and the Ryukyu Islands ( Edmondson, 1951; Marumura and Takeda, 2012; Maenosono, 2019).

Distribution. Previously known only from Japanese waters (Kii Peninsula, Wakayama Prefecture, 80–100 m in depth; Tanega-shima Island, ca. 70 m in depth; Ie-jima Island in the Ryukyu Islands, 70 m in depth; Ogasawara Islands), and now the Palau Islands, 30–40 m in depth.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Pilumnidae

Genus

Lophoplax

Loc

Lophoplax sextuberculata Takeda and Kurata, 1984

Shaga, I Bevin, Priya, K, Ramar, Selvakumar, Srinidhi, S, Mohan, G Chandra, Ranganathan, Sukanya, Moulvi, S M M & Mani, Bhuvaneswari 2023
2023
Loc

Lophoplax aff. sextuberulata

Takeda, M. & M. Marumura 1995: 4
1995
Loc

Lophoplax sextuberculata

Marumura, M. & A. Kosaka 2003: 47
Takeda, M. & Y. Kurata 1984: 200
1984
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