Lớp phụ Cá sụn (cá mập và cá đuối) (sharks and rays) >
Myliobatiformes (Stingrays) >
Potamotrygonidae (River stingrays) > Potamotrygoninae
Etymology: gomesi: This new species honors Ulisses L. Gomes, a pioneer in the study of elasmobranch morphology and systematics in Brazil, and an esteemed colleague and collaborator of the first author.
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt Sống nổi và đáy. Tropical; 5°N - 4°N, 70°W - 71°W
South America: Brazil in the upper Rio Amazonas basin according to the material studied, but suspected to enter the lower reaches of most major tributaries and the lower Rio Amazonas basin as well.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 13.5 cm WD con đực/không giới tính; (Ref. 86515)
Short description
Khóa để định loại | Hình thái học | Sinh trắc học
Can be diagnosed by its unique dorsal color pattern, composed of a uniform gray to light tan or brown color, without strong vermiculations, rosettes or other conspicuous patterns dorsally. This species is tentatively further separated from H. rosai by presenting a slightly more slender tail width at base (holotype tail width 4.5% DW vs. 5.6% DW in holotype of H. rosai), slightly greater preorbital snout length (holotype preorbital snout length 33.2% DW vs. 31.0% DW in holotype of H. rosai), and proportionally smaller pelvic inner length (2.1% DW in holotype of H. gomesi, and ranging from 1.0 to 3.3% DW in all specimens, with a mean of 1.9% DW vs. 4.6% DW in holotype of H. rosai, ranging from 1.3 to 4.9% DW in all specimens, with a mean of 3.7% DW) (Ref. 86515).
Life cycle and mating behavior
Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
de Carvalho, M.R. and N.R. Lovejoy, 2011. Morphology and phylogenetic relationships of a remarkable new genus and two new species of Neotropical freshwater stingrays from the Amazon basin (Chondrichthyes: Potamotrygonidae). Zootaxa 2776:13-48. (Ref. 86515)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): High vulnerability (58 of 100).
