Abstract
A new nicothoid (Choniomyzon libiniae Santos and Bj rnberg, new species) was found on the eggs of the decapod crustacean Libinia spinosa collected at Anchovas Beach (S o Sebasti o Island, SP, Brazil). The material obtained was fixed in formalin, cleared in lactic acid and glycerin, and the different forms of the parasite were drawn with the aid of a microscope and a camera lucida. The parasite eggs were attached to the host's eggs. Nauplii, three forms of copepodids, and adult females and males were found. The 12-segmented first antennae, the segmented urosome, the long and branched caudal setae, the oval form of the female, the lecithotrophic nauplius, a copepodid similar to the one described for Choniomyzon permitted the inclusion in this genus. It differs from the species described (C. panuliri Pillai) by the ornaments of the antenna and of the female legs, also by the presence of three types of copepodids.References
Bowman, T. & Kornicker, L.S. (1967) Two new crustaceans: the parasitic copepod Shaeronellopsis monothrix (Choniostomatidae) and its myodocopid ostracod host Parasterope pollex (Cylindroleberididae) from the southern New England coast. Proceedings of the United States National Museum, 123, 1–28, 1 pl.
Bowman, T. & Kornicker, L.S. (1968) Sphaeronellopsis hebe (Copepoda, Choniostomatidae), a parasite of the ostracod, Pseudophilomedes ferulanus. Crustaceana, 15, 113–116.
Boxshall, G.A. (1984) Phylogeny of Mormonilloida and Siphonostomatoida. Syllogeus, 58, 173– 176.
Boxshall, G.A. & Defaye, D. (1995) Copépodes nouveaux (Siphonostomatoida, Nicothoidae) parasites de cumacés et de décapodes profonds. Bulletin du Museum National d’Histoire Naturelle de Paris, 4ª sér., 17, section A, nº 3–4, 283–296.
Bradford, J.M. (1975) New parasitic Choniostomatidae (Copepoda) mainly from Antarctic and Subantarctic Ostracoda. New Zealand Oceanographic Institute Memoir, 67, 36 pp.
Bradford, J.M. (1980) First record of a copepod parasitizing the ostracod family Rutidermatidae (Myodocopina: Cypridinacea): Sphaeronella spinosa n. sp. (Copepoda: Choniostomatidae). Proceedings of the Biological Society of Washington, 93, 141–144.
Connolly, C.J. (1929) A new copepod parasite Choniosphaera cancrorum gen. et sp. n. representing a new genus, and its larval development. Proceedings of the Zoological Society of London, 3, 415–427.
Gnanamuthu, C. P. (1954) Choniosphaera indica, a copepod parasitic on the crab Neptunus sp. Parasitology, 44, 371–378.
Hansen, H.J. (1897) The Choniostomatidae: a family of Copepoda, parasites on crustacea malacostraca. Høst and Son, Copenhagen, 205 pp., 13 pls.
Johnson, M.W. (1957) The copepod Choniosphaera cancrorum parasitizing a new host, the green crab Carcinus maenas. Parasitology, 43, 470–473.
Kornicker, L.S. & Bowman, T. (1969) Sphaeronellopsis dikrothrix, a new choniostomatid Copepoda from the ostracod Metavargula ampla. Crustaceana, 17, 282–284.
Mason, J. (1959) The biology of Nicothoe astaci Audouin and Milne Edwards. Journal of the Marine Biological Association of the United Kingdom, 38, 3–16.
Pillai, N.K. (1962) Choniomyzon gen. nov. (Copepoda: Choniostomatidae) associated with Panulirus. Journal of the Marine Biological Association of India, 4, 95–99.
Ritchie, L. (1975) A new genus and two new species of Choniostomatidae (Copepoda) parasitic on two deep sea isopods. Zoological Journal of the Linnean Society, 57, 155–178.
Stock, J.H. (1958) On Choniostoma and Heptalobus (Copepoda, Choniostomatidae). Beaufortia, 80, 11–14.