Meloriastacus ctenidis gen. et sp. nov: A primitive interstitial copepod (Harpacticoida, Leptastacidae) from Tuscany
Huys, R.; Todaro, M.A. (1997). Meloriastacus ctenidis gen. et sp. nov: A primitive interstitial copepod (Harpacticoida, Leptastacidae) from Tuscany. Ital. J. Zoolog. 64(2): 181-196
In: Italian Journal of Zoology. Taylor & Francis/Mucchi Editore: Modena. ISSN 1125-0003; e-ISSN 1748-5851
A new interstitial copepod, Meloriastacus ctenidis gen. et sp. nov. (Harpacticoida, Leptastacidae), is described from the shallow Meloria Shoals, Tuscany (Italy). It represents the most primitive leptastacid known to date, displaying several unique plesiomorphic character stares previously unknown in the family. A sistergroup relationship with Archileptastacus Huys is suggested on the basis of the derailed structure of the caudal ramus, the fifth legs, the distal endopodal armature of P2-P4 and the presence of spinule rows on either side of the anal opening. The ancestral leptastacid condition for the P5 setation is re-assessed and the homology of the caudal ramus setae discussed. The structure of the mouthparts in Meloriastacus suggests that mucus-trap feeding was adopted only secondarily in the evolution of the family.
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