Abstract
The ontogeny of the cytheroidean species Loxoconcha japonica is documented from the earliest instar to the adult. The first instar (instar A-8) of L. japonica is different from that of cypridoidean species in that it has an additional appendage, the furca, present. From instar A-7 onwards, the appearance of the appendages is similar to that of cypridoidean and bairdioidean species. The furca is well developed in instars A-8 to A-5, and is probably an important appendage in these early instars, despite its reduced form in the adults. Some appendages of L. japonica (e.g. the antennae) gain very few setae and claws through ontogeny, compared with species from other superfamilies. This possibly reflects paedomorphic evolution of this species.
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References
Dahms, H., 2000. Phylogenetic implications of the Crustacean nauplius. Hydrobiologia 417: 91–99.
Fox, H. M., 1964. On the larval stages of Cyprids and on Siphlocandona (Crustacea, Ostracoda). Proc. zool Soc. Lond., 142: 165–176.
Hart, C.W., Jr., N. B. Nair & D. G. Hart, 1967. A new ostracod (Ostracoda: Entocytheridae) commensal on a wood-boring marine ostracod from India. Natulae Naturae Acad. Nat. Sci. Phil. 409: 11 pp.
Hart, C.W. Jr., L. C. Hayek, J. Clark & W. H. Clark, 1985. The Life History and Ecology of the entocytherid ostracodUncinocythere occidentalis (Kozloff andWhitmann) in Idaho. Smith. Cont. Zoo. 419: 1–22.
Horne, D. J., A. Cohen & K. Martens, 2002. Taxonomy, morphology and biology of Quaternary and living Ostracoda. In Holmes, J. A. & A. Chivas (eds), Applications of the Ostracoda in Quaternary Research. AGU Geophysical Monograph series: 5–36.
Ishizaki, T., 2001. Intra-superfamily phylogenetic relationships of Cypridacean ostracodes on the basis of mode of increase of pore-systems with special reference to the comparison of characteristics of pore-systems between ostracode superfamilies. Unpublished master of science thesis, Department of Earth Sciences, Kanazawa University, Japan: 91 pp.
Kamiya, T., 1988a. Morphological and ethological adaptations of Ostracoda to microhabitats in Zostera beds. In Hanai, T. et al. (eds), Evolutionary Biology of Ostracoda. Kodansha Scientific, Tokyo: 303–318.
Kamiya, T., 1988b. Contrasting population ecology of two species of Loxoconcha (Ostracoda, Crustacea) in Recent Zostera (eelgrass) beds: adaptive differences between phytal and bottomdwelling species. Micropaleontology 34: 316–331.
Kamiya, T. & J. E. Hazel, 1992. Shared versus derived characters in pore-system of Loxoconcha (Ostracoda, Crustacea). J. Micropalaeontol. 11: 159–166.
Kesling, R. V., 1951. The morphology of ostracod molt stages. Illinois Biological Monographs 21: 324 pp.
Marshall, W. S., 1903. Entocythere cambaria n. g. n. sp., a parasitic ostracod. Trans.Wiscon. Acad. Sci., Art. Let. 14: 117–144, 4 pls, 30 figs.
Paris, P., 1920. Ostracods (premiere serie). Biospeologica: Archives de Zoologica Experimentale et Générale 58: 475–487, 50 figs.
Rioja, E., 1940. Estudios carcinologicos. V. Morfologia de un ostracodo epizoario observado sobre Cambarus (Cambarellus) montezumae Sauss. de Mexico, Entocythere heterodonta n. sp. y descripcion de algunos de sus estados lavarios. Anal. Inst. Bio., Mex. 11: 593–609, 6 figs.
Roelofs, H. M. A., 1968. Etude du development de l'ostracode marin Sphaeromicola dudichi Klie, 1938. Bull. Zoo. Mus. Uni. Ams. 1: 39–51.
Roessler, E. W., 1983. Estudios taxonomicos, ontogeneticos, ecologicos y etologicos sobre los ostracodos de agua dulce en Colombia. IV. Desarrollo postembrionario de Heterocyrpis bogotensis Roessler (Ostracoda, Podocopa, Cyprididae). Caldasia 13: 755–776.
Scheerer-Ostermeyer, E., 1940. Beitrag zur Entwicklungsgeschichte der Süßwasserostrakoden. Zoologische Jahrbücher, Abt. für Anat. und Ont. der Tiere 66: pp 349–370.
Smith, R. J.& T. Kamiya, In press. The ontogeny of the entocytherid ostracod Uncinocythere occidentalis (Crustacea). Hydrobiologia.
Smith, R. J. & T. Kamiya, 2002. The ontogeny of Neonesidea oligodentata (Bairdioidea, Ostracoda, Crustacea). Hydrobiologia 489: 247–277.
Smith, R. & K. Martens, 2000. The ontogeny of the Eucypris virens (Jurine, 1820) (Crustacea, Ostracoda). Hydrobiologia 419: 31–63.
Tsukagoshi, A., 1990. Ontogenetic change of distribution pattern of pore systems in Cythere species and its phylogenetic significance. Lethaia 23: 225–241.
Weygoldt, P., 1960. Embryologische Untersuchungen an Ostrakoden: Die Entwicklung von Cyprideis litoralis (G.S. Brady) (Ostracoda, Podocopa, Cytheridae). Zoologische Jahrbücher, Abt. für Anat. und Ont. der Tiere 78: 367–426.
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Smith, R.J., Kamiya, T. The ontogeny of Loxoconcha japonica Ishizaki, 1968 (Cytheroidea, Ostracoda, Crustacea). Hydrobiologia 490, 31–52 (2003). https://doi.org/10.1023/A:1023464320403
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DOI: https://doi.org/10.1023/A:1023464320403