New species of Cambeva from the Parapanema river drainage

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bekateen
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New species of Cambeva from the Parapanema river drainage

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Katz, A.M., & W.J. Costa. (2020). A new species of the catfish genus Cambeva from the Parapanema river drainage, southeastern Brazil (Siluriformes: Trichomycteridae). Tropical Zoology, 33(1). https://doi.org/10.4081/tz.2020.63

https://www.pagepress.org/biology/index ... le/view/63
ABSTRACT
The recently described catfish trichomycterid genus Cambeva comprises about 25 valid species, occurring mostly in river basins of south-eastern and southern Brazil. Fifteen species are endemic to the Paraná river basin, of which three are endemic to the Paranapanema river drainage. Herein we describe a fourth new species, Cambeva guareiensis n. sp., known only from the Guareí river. Cambeva guareiensis is similar to C. brachykechenos, C. cubataonis, C. diabola, C. davisi, C. diatropoporos, C. pascuali, C. poikilos and C. stawiarski by having a colour pattern consisting of dark brown spots scattered on the flank and can be differentiated by an exclusive combination of characters, including: the shape of the autopalatine; number of branchiostegal, anal-fin, dorsal-fin, dorsal and ventral caudal procurrent, and pectoral-fin rays; number of interopercular and opercular odontodes; number of vertebrae; and, insertion of anal fin, pelvic fin and urogenital papillae. This study indicates the potential for discovering a greater still unknown trichomycterid species diversity in the Paraná river basin.
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bekateen
Posts: 5730
Joined: Tue Sep 09, 2014 5:50 pm
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Re: New species of Cambeva from the Parapanema river drainage

Post by bekateen »

Key to Paranapanema river drainage species of Cambeva:
  • 1. Presence of pelvic fin girdle .... 2
  • 2. Flank with scattered blots .... 3
  • 3. Caudal-fin hyaline or with blots scattered .... 4
  • 4. Relative position of the urogenital papillae that is situated in the vertical through the
    centrum of 23th–24th vertebrae and 9-11 branchiostegal rays .... Cambeva davisi
    • Relative position of the urogenital papillae that is situated in the vertical through the
      centrum of 21st–22th vertebrae and 8 branchiostegal rays .... Cambeva guareiensis
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