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

• 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

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.