SEM Study of the Early Development of the Mandible of Artemia Urmiana and A. Parthenogenetica (Branchiopoda, Anostraca)

The development of the molar surface in post-embryonic stages of Artemia urmiana and A. parthenogenetica was studied using scanning electron microscopy (SEM). Cysts of both species have been collected from Urmia Lake, Iran, and its adjacent lagoons and were hatched and raised under laboratory condit...

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Bibliographic Details
Published in:Crustaceana 2009-01, Vol.82 (3), p.257-266
Main Authors: Davoodi, P., Rahimian, H., Agh, N.
Format: Article
Language:English
Subjects:
Anostraca
Artemia
Artemia urmiana
Branchiopoda
Brines
Fringe
Lagoons
Larvae
Larval development
Mandible
Marine
Platelets
Research universities
Teeth
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Summary:The development of the molar surface in post-embryonic stages of Artemia urmiana and A. parthenogenetica was studied using scanning electron microscopy (SEM). Cysts of both species have been collected from Urmia Lake, Iran, and its adjacent lagoons and were hatched and raised under laboratory conditions. The cuticular teeth on the molar surface appeared in stage L9 in A. urmiana but at L3 in A. parthenogenetica. While the appearance and development of the molar surface of those species were different during metanaupliar and post-metanaupliar stages, the morphology was similar in post-larval stages. Thus, these species can be distinguished based on the morphology of the molar surface and by the appearance of adult characteristics, all readily apparent in early phases of their respective life cycles. /// Le développement de la surface molaire chez les stades post-embryonnaires d'Artemia urmiana et d'A. parthenogenetica a été étudié en microscopie électronique à balayage (SEM). Les oeufs de durée des deux espèces ont été collectés dans le lac Urmia en Iran et ses lagunes adjacentes, et ont été mis à éclore puis les jeunes élevés en laboratoire. Les dents cuticulaires de la surface molaire sont apparues au stade L9 chez A. urmiana, mais au stade L3 chez A. parthenogenetica. Alors que l'apparition et le développement de la surface molaire de ces espèces étaient différents au cours des stades métanaupliens et post-métanaupliens, la morphologie était identique chez les stades post-larvaires. Ainsi, ces espèces peuvent être distinguées par la morphologie de la surface molaire et par l'apparition des caractéristiques adultes, toutes facilement à observer dans les premières phases de leurs cycles de vie respectifs.
ISSN:0011-216X
1568-5403
DOI:10.1163/156854008X390335