分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鳃亚纲 (鲨鱼与 鱼) (sharks and rays) >
Myliobatiformes (Stingrays) >
Potamotrygonidae (River stingrays) > Potamotrygoninae
Etymology: Paratrygon: Greek, para in the side of + Greek, trygon = a sting ray (Ref. 45335); parvaspina: Name from Latin 'parvus' meaning small, and 'spina' for spine; referring to the diagnostic reduced caudal sting of this new species; an adjective.
feminine. An adjective..
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 居于水底的.
South America: endemic to the Orinoco basin (n middle portion of the Orinoco River and its main affluents, the Bita and Tomo rivers).
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 54.3 cm WD 雄鱼/尚未辨别雌雄; (Ref. 125391)
简单描述
检索表 | 型态特徵 | 形态测量图
This species is distinguished by the following set of characters: spiracular process extremely short and reduced, slightly more developed in adults, and with few dermal denticles (vs. with large and knob shaped spiracular processes that almost cover the spiracle aperture in aiereba, and with short and straight spiracular process with developed dermal denticles in orinocensis); caudal sting very reduced, with mean of its length 6.2% DW [5.6-7.1% DW] (vs. longer caudal stings in aiereba and orinocensis with means and ranges, respectively, 11.3% DW [3-17.9% DW], and 11.9% DW [6.7-15.3% DW]); tail short, with means of the pre-caudal sting region and the distance between cloaca and tail tip, respectively, 21.1% and 50.4% DW (vs. longer tails in aiereba and orinocensis, with means of the pre-caudal sting region and the distance between cloaca and tail tip, respectively, 23.5% and 87.8% DW in aiereba, and 25.2% and 115.4% DW in orinocensis); anterior disc margin broadly rounded (vs. with well developed and visible concave anterior disc margins, especially the latter in aiereba and orinocensis; spiracles small and quadrangular, with mean length 5.2% DW [4.9-5.8% DW] (vs. larger spiracles with mean length 6% DW [4.4-11.6% DW] in aiereba, and with triangular and slightly smaller spiracles, with mean spiracle length 5.6% DW [4.5-7.9% DW] in orinocensis); rostral projection relatively large (vs. small or minute in aiereba and orinocensis, respectively); preorbital processes more laterally projected, externally exceeding level of nasal capsules (vs. preorbital processes less laterally projected, not exceeding level of nasal capsules in aiereba and orinocensis); lateral stay of synarcual cartilage long, exceeding the lateral level of anterior ventral condyle (vs. short and not exceeding the lateral level of anterior ventral condyle in aiereba and orinocensis); dorsolateral crest of scapular process not pronounced and not exceeding laterally the level of mesocondyle (vs. pronounced dorsolateral crests that laterally exceed the level of mesocondyle in aiereba and orinocensis); propterygium robust (vs. more slender in aiereba and orinocensis); concavity of the internal face of mesopterygium not so pronounced and curved (vs. very pronounced and curved in aiereba and orinocensis); metapterygium robust and highly curved (vs. metapterygium slender and more straight in aiereba and orinocensis) (Ref. 125391).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
Loboda, T.S., C.A. Lasso, R. de Souza Rosa and M.R. de Carvalho, 2021. Two new species of freshwater stingrays of the genus Paratrygon (Chondrichthyes: Potamotrygonidae) from the Orinoco basin, with comments on the taxonomy of Paratrygon aiereba. Neotrop. Ichthyol. 19(2). (Ref. 125391)
人类利用
工具
特别资料
下载 XML
网络资源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [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).
营养阶层 (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (43 of 100).
