RESUMO
The type specimens of the subclass Elasmobranchii deposited in the Museu de Zoologia da Universidade de São Paulo are compiled in an annotated list, including updated measurements, verified collection data and recent photographs of holotypes and selected paratypes. Relevant information on the preservation condition of the specimens and their current taxonomic status are also provided. The collection holds a total of 135 lots of type specimens of elasmobranchs, three holotypes and seven paratypes in the division Selachii plus 16 holotypes, one neotype, and 108 paratypes in the division Batoidea (total specimen count: 137). Four paratypes were not located and one was donated to another institution, and publication mistakes in catalog numbers and locality assignments are corrected. The vast majority of specimens belong to the neotropical freshwater stingrays (subfamily Potamotrygoninae). The present catalogue intends to facilitate taxonomic research by providing access to updated information on type specimens of mostly large-sized taxa, which are notoriously difficult or impossible to examine outside of their home institution.
Assuntos
Elasmobrânquios , Animais , BrasilRESUMO
A new species of Moenkhausia is described from the rio Brao Norte, a tributary of Rio Teles Pires draining the Serra do Cachimbo, rio Tapajs basin, Par, Brazil. The new species is diagnosed from all congeners, except M. moisae and M. pirauba, by having a high number of scales in the longitudinal series (4346 vs. 2341 in other Moenkhausia species). It can also be distinguished from the aforementioned species based on the combination of the following characters: a single humeral blotch, 2125 branched anal-fin rays, and a round and symmetrical caudal blotch not continuous anteriorly with the dark midlateral stripe. The new tetra herein described represents an additional, possibly endemic, taxon from the headwaters draining from Serra do Cachimbo, in the Brazilian Shield.
