Thalamita quadrilobata Miers, 1884

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 : 19-21

publication ID

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

DOI

https://doi.org/10.5281/zenodo.13826502

persistent identifier

https://treatment.plazi.org/id/1B153E3A-FF89-FFB5-F02B-CC0758A3F9EA

treatment provided by

Felipe

scientific name

Thalamita quadrilobata Miers, 1884
status

 

Thalamita quadrilobata Miers, 1884 View in CoL

( Fig. 7A–B View Fig )

Thalamita quadrilobata Miers, 1884, p. 539 View in CoL , pl. 48 fig. B.─Alcock, 1899, p. 84.─ Stephenson and Hudson, 1957, p. 349, figs. 2G, 3G, pl. 4 fig. 4, pl. 8 fig. M, pl. 9 fig. F.─ Stephenson, 1972a, p. 151; 1972b, pp. 18 (in key), 51; 1976, p. 24.─Apel and Spiridonov, 1998, p. 260, figs. 77, 86.

Thalamita admeta var. intermedia Borradaile, 1903a, p. 203 View in CoL (in key).

Thalamita Admete var. intermedia Borradaile View in CoL : De Man, 1926, p. 203 (in discussion), fig. 2.

Thalamita borradailei Wee and Ng, 1995, p. 62 View in CoL (in discussion).

Material examined. Inside of Gesodokkuru Reef off Arumonogui, Babelthuap I., Palau Is., dredged at ca. 20 m in depth; 1 ♀ (cb 10.8×cl 7.4 mm), NSMT-Cr 30974; July 13, 1980, K. Baba leg.

Remarks. De Man (1926) examined one of the syntypes of Thalamita admeta var. intermedia Borradaile, 1903 , to ascertain the taxonomic validity of his new species, Thalamita bilobata , and mentioned that both are different from each other most remarkably in the number of the teeth on the antennal basal segment. Wee and Ng (1995) discussed the taxonomic identity of some varieties of T. admete (Herbst, 1803) defined by Borradaile (1903a), and concluded that one of them, var. intermedia , is specifically distinct from T. admete . However, the corrected specific name, T. intermedia , was preoccupied by T. intermedia Miers, 1886 , and thus the new name, T. borradailei was proposed by Wee and Ng (1995). Later, Apel and Spiridonov (1998), who examined the syntypes of T. admeta var. intermedia and many specimens from the Indian Ocean and the West Pacific, concluded that T. borradailei falls into the size/age-related variation, accepting the tentative synonymisation of T. admete var. intermedia as proposed by Stephenson and Hudson (1957).

Thalamita quadrilobata View in CoL is, otherwise, close to T. bilobata De Man, 1926 View in CoL , with which T. miyakei Takeda, 1972 View in CoL known by Takeda (1972) and Takeda and Hayashi (1973) was synonymized as shortly mentioned by Takeda (1989b). In T. quadrilobata View in CoL , the front is two-lobed, each lobe is shallowly concave near the obtusely angulated lateral end, and the carapace anterolateral margin is armed with the remarkably sharp teeth, with a small fourth teeth ( Fig. 7A View Fig ). As clearly shown by De Man (1926: figs. 1a–b, 2), the antennal basal segment is armed with three spiniform teeth in T. quadrilobata View in CoL , but only one in T. bilobata View in CoL . Three sharp spines of the antennal basal segment are shown in the present paper (fig. 7B), and also seen in the line drawing given by Apel and Spiridonov (1998: fig. 77a–c).

Distribution. Widely distributed in the Indian Ocean, and also known from Indonesia, the Philippines, the Palau Islands, Australia, and French Polynesia in the Pacific, 5–25 m in depth.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Portunidae

Genus

Thalamita

Loc

Thalamita quadrilobata Miers, 1884

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

Thalamita borradailei

Wee, D. P. C. & P. K. L. Ng 1995: 62
1995
Loc

Thalamita Admete var. intermedia

Man, J. G. De 1926: 203
1926
Loc

Thalamita admeta var. intermedia

Borradaile, L. A. 1903: 203
1903
Loc

Thalamita quadrilobata

Stephenson, W. 1972: 151
Stephenson, W. & J. J. Hudson 1957: 349
Miers, E. J. 1884: 539
1884
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