Neues aus der Xenurolebias Gruppe

Termine, Berichte, Ankündigungen
Antworten
Oldman50

DKG-Mitglied
Beiträge: 848
Registriert: 08 Sep 2011 21:31
Wohnort: 69502 Hemsbach/Bergstr.
Kontaktdaten:

Neues aus der Xenurolebias Gruppe

Beitrag von Oldman50 »

Live males of species of the genus Xenurolebias

Integrative taxonomy and conservation of seasonal killifishes, Xenurolebias (Teleostei: Rivulidae), and the Brazilian Atlantic Forest

Wilson J.E.M. Costa and Pedro F. Amorim




Systematics and Biodiversity
Published online: 27 May 2014

This study is focused on a poorly known genus of small killifishes, Xenurolebias, comprising species uniquely living in temporary pools of the Atlantic Forest in the coastal plains of eastern Brazil (a region undergoing intense deforestation). Xenurolebias comprises two nominal, morphologically similar species, but some variability among populations suggests it represents a species complex. In order to delineate species limits, a taxonomic revision was conducted combining two different approaches: (i) a character-based approach using morphological variation (colour patterns, fin morphology, meristic and morphometric data) and (ii) a tree-based approach using mt-DNA (tRNA-Met, tRNA-Gln and ND2). The results strongly supported four species: X. myersi (Carvalho) from the Itaúnas river basin and adjacent smaller drainages; X. izecksohni (Cruz) from the Barra Seca river basin; X. cricarensis Costa, sp. nov., from the São Mateus river basin; and X. pataxo Costa, sp. nov., from the Mucuri, Itanhem and Jucuruçu river basins. Recognition of four distinct species in Xenurolebias should change views about the conservation of the species, one of which (X. pataxo) is seriously endangered and should be considered a priority for conservation.

WS
Abstract:
http://www.tandfonline.com/doi/abs/10.1 ... ode=tsab20
arten.JPG
arten.JPG (69.82 KiB) 1546 mal betrachtet
Antworten