Farzana YOUSUF

Cerceis insolita n. sp., a new species of sphaeromatid isopod crustacean from the coastal waters of Pakistan

Cerceis insolita n. sp. (Isopoda, Sphaeromatidae), from the rocky intertidal region of Manora Island, Karachi coast, Pakistan, is described. The species can be identified on the basis of the following characters: antenna 1, pleon, pleotelson, coxal plates, pleopods 4 and 5, and notably by the unusual female pereopod 1 merus being short, transversely expanded, with the distolateral angle laterally produced into circular structure; carpus short, transversely expanded, propodus stout, curved laterally, with convex medial and concave lateral margins, dactylus subtriangular, well-developed unguis and accessory unguis. Right pereopod 7 long, slender, merus distomedial angle produced into medially directed lobe. Left pereopod 7 merus distomedial angle produced posteriorly. The species is described and illustrated.

Anahtar Kelimeler:

Key words: Isopoda, Sphaeromatidae, intertidal rocky habitat, Indian Ocean, Pakistani coast, new species

Cerceis insolita n. sp., a new species of sphaeromatid isopod crustacean from the coastal waters of Pakistan

Keywords:

Key words: Isopoda, Sphaeromatidae, intertidal rocky habitat, Indian Ocean, Pakistani coast, new species,

PDF

___

Barnard, K.H. 1914. Contribution to the crustacean fauna of South Africa, 3. Additions to the marine Isopoda with notes on some previously incompletely known species. Annals of South African Museum 10: 325-442, pls. 27-39.
Barnard, K.H. 1920. Contribution to the crustacean fauna of South Africa, 6. Further additions to the list of marine Isopoda. Annals of South African Museum 17: 319-438.
Barnard, K.H. 1936. Isopods collected by the R.I.MS. “Investigator.” Records of the Indian Museum 38(2): 147-191.
Barnard, K.H. 1955. Additions to the fauna-list of South African Crustacea and Pycnogonida. Annals of South African Museum 43: 1-107.
Bruce, N.L. 1992. A new genus of hemibranchiate sphaeromatid isopod crustacean from tropical Western Australia. Journal of Natural History 26: 1263-1272.
Bruce, N.L. 1995. Th e taxonomy and phylogeny of tube-tailed sphaeromatid isopods, Crustacea, with descriptions of new species and a new genus from southern Australia. Ophelia 43(2): 127-180.
Dana, J.D. 1853. Crustacea. Part II. In: Th e Geographical Distribution of Animals and Plants (ed. C. Wilkes), Trubner and Company, Philadelphia, pp. 696-805.
Glynn, P.W. 1970. A systematic study of the Sphaeromatidae (Crustacea: Isopoda) of Isla Margarita, Venezuela, with descriptions of three new species. Memoria de la Sociedad de Ciencias Naturales La Salle 30: 1-48.
Harrison, K. and Ellis, J.P. 1991. Th e genera of the Sphaeromatidae (Crustacea: Isopoda): a key and distribution list. Invertebrate Taxonomy 5: 915-952.
Harrison, K. and Holdich, D.M. 1982. New eubranchiate sphaeromatid isopods from Queensland waters. Memoirs of the Queensland Museum 20(3): 421-446.
Harrison, K. and Holdich, D.M. 1984. Hemibranchiate sphaeromatids (Crustacea: Isopoda) from Queensland, Australia, with a worldwide review of the genera discussed. Zoological Journal of Linnean Society, London 81: 275-387.
Javed, W. and Yousuf, F. 1996. A new species of Cerceis (Isopoda, Sphaeromatidae) from the Arabian Sea. Crustaceana 69(2): 155-161.
Leach, W.E. 1814. Crustaceology. In: Brewster’s Edinburgh Encyclopedia, Vol. 7, Edinburgh, pp. 383-437.
Latreille, P.A. 1825. Familles Naturelles du Règne Animal, Exposés Succinctement et dans un Ordre Analytique avec L’Indication de leurs genres. Paris: 570.
Milne Edwards, H. 1840. Histoire Naturelle des Crustacés 3: 1-638.
Müller, H.G. 1991. Two new species of Cerceis and Dynoides from a sabellid reef at Sri Lanka (Crustacea: Isopoda: Sphaeromatidae). Zoologischer Anzeiger 226(5/6): 307-318.
Nierstrasz, H.F. 1931. Die Isopoden de Siboga - Expeditie. III. Isopoda Genuina. II. Flabellifera. Siboga Expeditie. Monographs 32c: ITil’i’i, pls 2.
Pillai, N.K. 1954. A preliminary note on the Tanaidacea and Isopoda of Travancore. Bulletin of the Central Research Institute, University of Travancore, Trivandrum, Natural Sciences 3(1): 1-27.
Woodward, H. 1877. Crustacea. Encyclopaedia Britannica, 9th ed., Vol. 6, pp. 632-666.