On the South American species of the genus Meridiosignum (Crustacea: Isopoda: Asellota: Paramunnidae)

Meridiosignum undulatum n. sp. and M. disparitergum n. sp. are described from off the Río de la Plata estuary. These two new species are easily distinguished from other members of the genus Meridiosignum in having the lateral margins of pereonites 2 and 3 bilobed (the concavity is much more pronounc...

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Bibliographic Details
Main Authors: Doti, Brenda Lía, Roccatagliata, Daniel Carlos
Language:unknown
Published: 2009
Subjects:
Isopoda
Meridiosignum
New species
South Atlantic Ocean
Taxonomy
isopod
male
shallow water
Southern Hemisphere
Argentina
Beagle Channel
Puerto Deseado
Rio de la Plata
Santa Cruz [Argentina]
South America
Asellota
Crustacea
Paramunnidae
Online Access:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00222933_v43_n17-18_p1115_Doti
https://hdl.handle.net/20.500.12110/paper_00222933_v43_n17-18_p1115_Doti
Description
Summary:Meridiosignum undulatum n. sp. and M. disparitergum n. sp. are described from off the Río de la Plata estuary. These two new species are easily distinguished from other members of the genus Meridiosignum in having the lateral margins of pereonites 2 and 3 bilobed (the concavity is much more pronounced in M. disparitergum), and those of pereonite 4 produced into a single process. The terminal male instar of Meridiosignum menziesi (Winkler, 1994) is described, and this species is herein reported from the Beagle Channel and Puerto Deseado. All the species currently placed in Meridiosignum were found in shallow waters in the southern hemisphere, M. undulatum n. sp. and M. disparitergum n. sp. being the species recorded at the greatest depth (129 m). © 2009 Taylor & Francis. Fil:Doti, B.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Roccatagliata, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.

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