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Carcinization in the Anomura – fact or fiction? II. Evidence from larval, megalopal and early juvenile morphology Naturalis
McLaughlin, Patsy A.; Lemaitre, Rafael; Tudge, Christopher C..
In this second of a two-part series, carcinization in the Anomura has been reviewed from early juvenile, megalopal, and larval perspectives. Data from megalopal and early juvenile development in ten genera of the Lithodidae have provided unequivocal evidence that earlier hypotheses regarding evolution of the king crab pleon were erroneous. A pattern of sundering, and decalcification has been traced from the megalopal stage through several early crabs stages in species of Lithodes and Paralomis, with supplemental evidence from species in eight other genera. Of major significance has been the attention directed to the marginal plates of the second pleomere, which when separated in lithodids are not homologous with the adult so-called “marginal plates” of the...
Tipo: Article / Letter to the editor Palavras-chave: Carcinization; Anomura; Paguroidea; Lithodidae; Paguridae; Lomisidae; Porcellanidae; Larval; Megalopal and early juvenile morphology; Pleonal tergites.
Ano: 2004 URL: http://www.repository.naturalis.nl/record/534278
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Phylogeny of the Anomura (Decapoda, Crustacea): Spermatozoa and spermatophore morphological evidence Naturalis
Tudge, Christopher C..
A phylogenetic analysis of selected anomuran, thalassinidean, and other decapod crustacean taxa, based on spermatozoal ultrastructural characters and spermatophore morphological characters, was performed and the following relationships of the taxa are elucidated from the trees produced. The Anomura are not a monophyletic assemblage, with the lomoid Lomis being exclusive of the remainder of the anomuran taxa, and the thalassinid Thalassina included in the anomuran clade. The synapomorphy joining the majority of the conventional anomuran taxa ( Lomis excluded) is the cytoplasmic origin of the microtubular arms. When the palinurid and thalassinoid representatives are separately designated as outgroups, the Astacidea and Brachyura jointly formed a sister group...
Tipo: Article / Letter to the editor Palavras-chave: Anomura; Phylogeny; Spermatozoa; Spermatophore; Ultrastructure; Hermit crabs.
Ano: 1997 URL: http://www.repository.naturalis.nl/record/534344
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