Stimpson, 1858

Carapace subrounded quadrangular, flattened, smooth and glossy. Postfrontal lobes produced, cardiac and intestinal regions surrounded by fine grooves. Front broad, anterior margin concave medially, forming 2 rounded lobes. Dorsal orbital border without suture. Outerorbital angle triangular, slightly directed out- and forwards, posteriorly followed by 2 emarginations which divide the antero-lateral margin into 3 lobes. The two lateral margins of the carapace almost parallel. Posterior margin sensibly concave. Ventral orbital crest serrated, inner ventral orbital angle triangular. Antenna excluded from the orbit. Merus of the third maxillipeds with the antero-external angle produced, exopodite very broad.
Chelipeds short. Merus smooth, its basal half with tomentum on the dorsal border. Carpus smooth, its inner-distal angle bluntly triangular. Inner surface of the palm smooth; in the male its outer surface densely covered with long hairs at the base of two fingers, which are not gaping. Ambulatory legs slender, dorsal border of the merus with long hairs at its base, carpus smooth; propodus of the first 3 ambulatory legs with tomentum on the distal half of the posterior border. Propodus of the last legs broadened distally. Each dactylus with tomentum on its posterior border, claw-shaped at the tip.
First pleopod of the male almost straight, with a distal chitinous process directed dorsally outwards, and a subdistal rounded lobe on the dorsal surface. Abdomen of the male triangular; telson elongate-elliptical. Abdomen of the female rounded and large; telson triangular, bluntly produced at the distal margin. Carapace length of the male 10.6 mm, breadth 11.7 mm; of the female, length 8.7 mm, breadth 9 mm. (Dai & Yang, 1991)

Type locality: Kikaishima, Okinawa, Japan.
Range: Madagascar - Fort-Dauphin (Crosnier, 1965); Mauritius (Michel, 1964); Maldives (Borradaile, 1903a); Sumatra - Banda Aceh; Japan - Kikaishima (Stimpson, 1858b, 1907), Hachijo-jima and Ishigaki-jima (Sakai, 1976a); Taiwan; China - Paracel Islands (Chen, 1980, Dai & Yang, 1991); Indonesia - Noordwachter Island (de Man, 1888d), Tanahjampea and Geser Island (Tesch, 1918a); New Caledonia; Fiji (Miers, 1886); Line Islands - Palmyra and Tabuaeran (Edmondson, 1923).

Kingdom Animalia
Phylum Arthropoda
Class Crustacea
Order Decapoda
Suborder Pleocyemata
Infraorder Thoracotremata
Superfamily Grapsidoidea
Family Grapsidae
Subfamily Varuninae
Genus Pseudograpsus
Species Pseudograpsus albus

Status in World Register of Marine Species

Accepted name: Pseudograpsus albus Stimpson, 1858

Scientific synonyms and common names

Pseudograpsus albus Stimpson, 1858b: 104. -- Milne Edwards A., 1873a: 314, pl. 18, figs 2, 2a. -- Miers, 1886: 262. -- de Man, 1888d: 382. -- de Man, 1889: 440. -- de Man, 1895b: 111. -- Rathbun, 1907: 32. -- Stimpson, 1907: 127. -- Tesch, 1918a: 99. -- Edmondson, 1923: 11. -- Balss, 1938a: 79. -- Sakai, 1939: 666. -- Guinot, 1962b: 241, figs 15a-b. -- Michel, 1964: 14. -- Crosnier, 1965: 42, figs 48, 52-57. -- Sakai, 1976a: 645, fig. 353b. -- Chen H., 1980b: 141, fig. 24, pl. 4, fig. 7. -- Suzuki H., 1985. -- Dai & Yang, 1991: 520, fig. 266(1-3), pl. 66(7).
Pachystomum philippinense Nauck, 1880: 67.
Litocheira inermis Borradaile, 1903a: 430, fig. 111.

Kikaishima-íwagani [Japanese]
iwagani, Kikaishima- [Japanese]

Balss, H., 1938a. Die Dekapoda Brachyura von Dr. Sixten Bock's Pazifik Expedition 1917-1918. Göteborges Kungliga Vetenskaps- och Vitterhets-Samhälles Handlingar, Ser. B, 5(7): 1-85, figs 1-18, pls 1-2.

Borradaile, L.A., 1903a. Marine Crustaceans. IV. Some remarks on the classification of the crabs. V. The Crabs of the Catometope families. VI. The sand Crabs (Oxystomata). VII. The Barnacles. In: J.S. Gardiner (ed.), The Fauna and Geography of the Maldive and Laccadive Archipelagoes, being the Account of the Work Carried on and of the Collections Made by an Expedition During the Years 1899 and 1900, 1(4): 424-443, pls 22. (1(4): 424-429, fig. 110; 1(4): 429-433, figs 111-114; 1(4): 434-439, figs 115-117, pl. 22.) [1903/I]

Chen, H., 1980b. Studies on the crabs of the Xisha Islands, Guangdong Province, China. II. Studia marina sinica, 17: 117-147, figs 1-25, pls 1-4. (In Chinese with English summary).

Crosnier, A., 1965. Crustacés Décapodes. Grapsidae et Ocypodidae. Faune de Madagascar, 18: 1-143, figs 1-260, pls 1-11.

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.)

de Man, J.G., 1888d. Bericht über die von Herrn. Dr. J. Brock im indischen Archipel gesammelten Decapoden und Stomatopoden. Archiv für Naturgeschichte, Berlin, 53(pt. 1): 289-600, pls 11-22a.

de Man, J.G., 1889. Über einige neue oder seltene indo-pacifische Brachyuren. Zoologische Jahrbücher, Iena, Abteilung für Systematik, 4: 409-452, pls 9-10.

de Man, J.G., 1895b. Bericht über die von Herrn Schiffscapitän Storm zu Atjeh, an den westlichen Küsten von Malakka, Borneo und Celebes sowie in der Java-See gesammelten Decapoden und Stomatopoden. (In 6 parts). Zoologische Jahrbücher, Abteilung für Systematik, Geographie und Biologie der Thiere. Vol. 9(Teil 2): 75-218, figs 16-39. [1895/XII]

Edmondson, C.H., 1923. Crustacea from Palmyra and Fanning Islands. Bulletin of the Bernice P. Bishop Museum, Honolulu, 5: 1-43, figs 1-3, pls 1-2.

Guinot, D., 1962b. Sur une collection de Crustacés Décapodes Brachyoures des îles Maldives et de la Mer Rouge (Expédition Xarifa 1957-1958). Kieler Meeresforsch., 18(2): 231-244, figs 1-17, pls 1-5.

Michel, C., 1964. Checklist of the Crustacea Brachyura (Crabs) recorded from Mauritius. Mauritius Institute Bulletin, 6(1): 1-48.

Miers, E.J., 1886. Report on the Brachyura collected by H.M.S. Challenger during the years 1873-1876. In: C.W. Thompson & J. Murray, Report on the Scientific Results of the exploring Voyage of H.M.S. Challenger during the years 1873-1876, under the command of Captain George S. Nares, R.N., F.R.S. and the Late Captain Frank Tourle Thomson, R.N., Zoology, 17(2): i-xli, 1-362, pls 1-29.

Milne Edwards, A., 1873a. Recherches sur la faune carcinologique de la Nouvelle-Calédonie. Part II. Groupe des Cyclométopes Portuniens. Nouvelles archives du Muséum national d'Histoire naturelle, Paris, 9: 155-332, pls 4-18.

Nauck, E., 1880. Das Kaugerüst der Brachyuren (mit Beschreibung neuer Gattungen und Arten, z. T. von C. Semper). Zeitschrift für wissenschaftliche Zoologie, Leipzig, 34(1): 1-69, 2 figs, pl. 1.

Rathbun, M.J., 1907. Reports on the Scientific Results of the Expedition to the Tropical Pacific, in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer Albatross, from August, 1899 to March, 1900, Commander Jefferson F. Moser, U.S.N., commanding - IX. Reports on the scientific results of the expedition to the eastern tropical Pacific, in charge of Alexander Agassiz, by the U.S. Commission Steamer Albatross from October, 1904 to March, 1905, lieut.-commander L.M. Garrett, U.S.N., commanding - X. The Brachyura. Memoirs of the Museum of Comparative Zoology at Harvard College, 35(2): 23-74, pls 1-9.

Sakai, T., 1939. Studies on the crabs of Japan. IV. Brachygnatha, Brachyrhyncha, pp. 365-741, figs 1-129, pls 42-111, table 1. Yokendo Co., Tokyo.

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.

Stimpson, W., 1858b. Prodromus descriptionis animalium evertebratorum, quae in Expeditione ad Oceanum Pacificum Septentrionalem, a Republica Federata missa, Cadwaladaro Ringgold et Johanne Rodgers Ducibus, observavit et descripsit. Pars V. Crustacea Ocypodoidea. Proceedings of the Academy of Natural Sciences of Philadelphia, 10: 93-110 (39-56).

Stimpson, W., 1907. Report on the Crustacea (Brachyura and Anomura) collected by the North Pacific Exploring Expedition, 1853-1856. Smithsonian Miscellaneous Collections, Washington, 49(1717): 1-240, pls 1-26.

Suzuki, H., 1985. A list of the macro-crustaceans collected from Formosa. Reports of the Marine Environment of the Southern Seas of the Ryukyus, 2: 49-59. (In Japanese with English abstract)

Tesch, J.J., 1918a. The Decapoda Brachyura of the Siboga-Expedition. I. Hymenosomidae, Retroplumidae, Ocypodidae, Grapsidae and Gecarcinidae. Siboga Expeditie Monografie, 39C1(82): 1-148, pls 1-6.

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