Cancellus ornatus Benedict, 1901

Nucci, Paulo Ricardo & Melo, Gustavo Augusto Schmidt De, 2015, Hermit crabs from Brazil: Family Diogenidae (Crustacea: Decapoda: Paguroidea), except Paguristes, Zootaxa 3947 (3), pp. 327-346 : 329-330

publication ID	https://doi.org/10.11646/zootaxa.3947.3.2
publication LSID	lsid:zoobank.org:pub:4BEA9B2D-E883-43B5-AE74-1EBBD0D4D684
DOI	https://doi.org/10.5281/zenodo.6096674
persistent identifier	https://treatment.plazi.org/id/03A787D9-FFD9-DF3E-FF73-F9687EE0B48D
treatment provided by	Plazi (2016-04-19 04:44:06, last updated 2024-11-26 05:04:13)
scientific name	Cancellus ornatus Benedict, 1901
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Cancellus ornatus Benedict, 1901 View in CoL

( Figs 1 View FIGURE 1 C, 5C)

Cancellus ornatus Benedict, 1901b: 772 View in CoL , figs 1, 2.— Alcock, 1905: 167 [list].— Gordan, 1956: 306 [list].— Russell, 1962: 19.— Mayo, 1973: 18, figs 5–8.— Williams, 1984: 193, fig. 134.— Coelho & Ramos-Porto, 1986: 49.— Rieger, 1998: 421.— Melo, 1999: 44, fig. 4.—McLaughlin et al., 2010: 19.

Cancellus calypso Forest & Saint Laurent, 1968: 96 , figs 54–59.

Material examined. Brazil: Pernambuco—Tamandaré, 1 spec. (DOUFPE—3681). Rio de Janeiro—Proj. Monitoramento, st. 3, 1 spec. (MZUSP-13880).

Diagnosis. Shield slightly broader than long, with lateral margins strongly convex. Ocular peduncles approximately 2/3 length of shield, slightly turned outer. Antennal flagella short, slightly longer than ocular peduncles. Anterodorsal region of dactyl, propodus and merus of first ambulatory legs and chelipeds forming an operculum; irregular transverse rows of tubercles on opercular face. First ambulatory legs with opercular face slightly concave on carpus and propodus, dactylus planar. Second ambulatory legs with lateral face of merus and propodus longer than twice the width of these segments. Sixth abdominal tergite broadly hexagonal, length 2/3 width. Anterior lobe larger than posterior. Telson broader than long; two anterolateral depressions on either side in front of raised central area.

Distribution. Western Atlantic—North Carolina, Florida, Bahamas, Gulf of Mexico, Antilles, north of South America and Brazil (from Pernambuco to Rio de Janeiro).

Remarks. Found at depths of 30– 350 m. In Brazil, the genus Cancellus is represented only by C. ornatus whose nearest relative is C. viridis from Caribbean Sea. The use of limestone, calcareous algae, sponges and coral as shelter, hinders the recognition of possible new species, because field collectors, expecting to find hermit crabs in gastropod shells, may unknowingly discard Cancellus specimens.

References

Alcock, A. (1905) Catalogue of the Indian decapod Crustacea in the collection of the Indian Museum. Part II. Anomura. Fascicle I, Pagurides. Calcutta, 197 pp.

Benedict, J. E. (1901 b) The Anomuran Collections made by the Fish Hawk Expedition to Porto Rico. Bulletin of the United States Fish Commission, 20 (2), 129 - 148.

Coelho, P. A. & Ramos Porto, M. (1986) Sinopse dos crustaceos decapodos brasileiros (familias Callianassidae, Callianideidae, Upogebiidae, Parapaguridae, Paguridae, Diogenidae). Trabalhos Oceanograficos da Universidade Federal de Pernambuco, 19, 27 - 53. [Dated 1985, published 1986]

Forest, J. & Saint Laurent, M. (1968) Campagne de la Calypso au large des cotes atlantiques de L'amerique du Sud (1961 - 1962). 6. Crustaces decapodes: pagurides. Annales de l'Institut Oceanographique de Monaco, 45 (2), 47 - 169.

Gordan, J. (1956) A bibliography of pagurid crabs, exclusive of Alcock, 1905. Bulletin of the American Museum of Natural History, 108 (3), 253 - 352.

Mayo, B. S. (1973) A review of the genus Cancellus (Crustacea: Diogenidae) with the description of a new species from the Caribbean sea. Smithsonian Contributions to Zoology, 150, 1 - 63. http: // dx. doi. org / 10.5479 / si. 00810282.150

Melo, G. A. S. (1999) Manual de Identificacao dos Crustacea Decapoda do Litoral Brasileiro. Editora Pleiade. Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, 551 pp.

Rieger, P. J. (1998) Malacostraca-Eucarida. Paguroidea. In: Young, P. S. (Ed.), Catalogue of Crustacea of Brazil. Museu Nacional, Rio de Janeiro, pp. 413 - 429.

Russell, E. S. (1962) The diversity of animals, an evolutionary study. Acta Biotheoretica, supplement 1, 1 - 151.

Williams, A. B. (1984) Shrimps, lobsters and crabs of the Atlantic coast of the eastern United States, Maine to Florida. Smithsonian Institution Press, Washington, D. C. 550 pp.