22 (!) новых вида рыб-ножей рода Sternarchorhynchus (Apteronotidae)

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22 (!) новых вида рыб-ножей рода Sternarchorhynchus (Apteronotidae)

Сообщение Yan » Пт апр 30, 2010 6:09 pm

Sternarchorhynchus axelrodi
Sternarchorhynchus chaoi
Sternarchorhynchus cramptoni
Sternarchorhynchus freemani
Sternarchorhynchus galibi
Sternarchorhynchus goeldii
Sternarchorhynchus hagedornae
Sternarchorhynchus higuchii
Sternarchorhynchus inpai
Sternarchorhynchus jaimei
Sternarchorhynchus kokraimoro
Sternarchorhynchus mareikeae
Sternarchorhynchus marreroi
Sternarchorhynchus mendesi
Sternarchorhynchus montanus
Sternarchorhynchus retzeri
Sternarchorhynchus schwassmanni
Sternarchorhynchus starksi
Sternarchorhynchus stewarti
Sternarchorhynchus taphorni
Sternarchorhynchus villasboasi
Sternarchorhynchus yepezi

de Santana & Vari, 2010
Abstract:

Analysis of 88 characters of external and internal body systems yielded a phylogenetic reconstruction of the Neotropical electric knifefish genus Sternarchorhynchus (Apteronotidae; Gymnotiformes). The results support a hypothesis of Sternarchorhynchus as the sister group to Platyurosternarchus. A series of synapomorphies, many involving major innovations of the neurocranium, jaws, suspensorium, and associated systems that permit an unusual mode of grasp-suction feeding, support the monophyly of both genera. Synapomorphies largely resolve relationships within Sternarchorhynchus with basal nodes strongly supported by characters pertinent to prey capture and initial processing of food items. These possible key innovations may provide Sternarchorhynchus with a competitive advantage over other clades of the Apteronotidae and account for the species diversity of the genus in Neotropical rivers. Adaptive radiation in Sternarchorhynchus was analysed. Habitat preference transitions repeatedly occurred in the genus between deep-river channel dwelling species and rheophilic species with preferences for higher energy setting including rapids and swift-flowing fluviatile settings. Twenty-two species of Sternarchorhynchus are described as new based on samples that originated in the smaller rivers draining into the Golfo de Paria, the Marowijne and Essequibo River basins, the Río Orinoco and in particular the Amazon River basin. The 32 species in Sternarchorhynchus make it the most speciose genus in the Apteronotidae.
Electric fishes of the genus Sternarchorhynchus (Teleostei, Ostariophysi, Gymnotiformes); phylogenetic and revisionary studies.
de Santana, C.D. & Vari, R.P.
Zoological Journal of the Linnean Society, 159 (1): 223-371.
Ян

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Сообщение Efim » Пт май 07, 2010 3:45 pm

Ого!
Можно коллекцию собирать)

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