Sakai, 1969

The carapace is subcircular in outline, a little longer than broad. There are ten prominent tubercles around the margin of the carapace, similar to the common Japanese species Arcania undecimspinosa de Haan. The dorsal surface is thickly studded with granules and provided with fifteen tubercles, of which three are in the median line, the last one being on the intestinal region near the posterior border and the others disposed symmetrically on the hepatic and branchial regions.
The front projects strikingly anteriorly and is bilobed. Each lobe ends in a process divided by a deep V-shaped median sinus. The outer orbital tooth is moderately strong. On the subhepatic region, there is a high tubercle, which can be seen from above just below the first marginal tubercle.
The chelipeds are slender; the merus is covered with longitudinal rows of granules; the fingers are a little longer than the propodus and are finely denticulated along the prehensile edge.
The terminal segment of the male abdomen is extremely long and narrow.
Measurements: Length of carapace in the median line 10 mm, width 8.5 mm. (T. Sakai, 1969)

Type locality: Manazuru Peninsula, Japan.
Range: Japan - Manazuru Peninsula (Sakai, 1969, 1976); China - Hainan Island (Dai & Yang, 1991); Western Samoa, Fiji (Galil, 2001a); intertidal to 9m.

Kingdom Animalia
Phylum Arthropoda
Class Crustacea
Order Decapoda
Suborder Pleocyemata
Infraorder Heterotremata
Superfamily Leucosioidea
Family Leucosiidae
Subfamily Philyrinae
Genus Arcania
Species Arcania sagamiensis

Status in World Register of Marine Species

Not included in WoRMS database

Scientific synonyms and common names

Arcania sagamiensis Sakai, 1969: 247, fig. 1a-a'. -- Sakai, 1976a: 93, fig. 50a-b, pl. 28, fig. 4. -- Dai & Yang, 1991: 75, fig. 35, pl. 8(4). -- Muraoka, 1998: 18. -- Galil, 2001a: 191-193, figs 3A, 7A.

Sagami-toge-kobushi [Japanese]
toge-kobushi, Sagami- [Japanese]

Dai, A. & S. Yang, 1991. Crabs of the China Seas, i-iv, 1-608, figs 1-295, pls 1-74. China Ocean Press, Beijing and Springer-Verlag, Berlin Heidelberg New York Tokyo, English edition. (Translation from Chinese original 1986.)

Galil, B.S., 2001a. A revision of the genus Arcania Leach, 1817 (Crustacea: Decapoda: Leucosioidea). Zoologische Mededelingen, Leiden, 75(11): 169-205, figs 1-7.

Muraoka, K., 1998. Catalogue of the Brachyuran and Anomuran Crabs donated by Prof. Dr. Tune Sakai to the Kanagawa Prefectural Museum. Catalogue of the Collection in the Kanagawa Prefectural Museum of Natural History, 11: 5-67, pls 1-16.

Sakai, T., 1969. Two new genera and twenty-two new species of crabs from Japan. Proceedings of the biological Society of Washington, 82: 243-280, figs 1-20, pls 1-2.

Sakai, T., 1976a. Crabs of Japan and the Adjacent Seas. (In 3 volumes: (1) English text: i-xxix, 1-773, figs 1-379, (2) Plates volume: 1-16, pls 1-251, (3) Japanese text: 1-461, figs 1-2, 3 maps.) Kodansha Ltd, Tokyo.

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