分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
板鰓亜鋼(サメとエイ類) (sharks and rays) >
Myliobatiformes (Stingrays) >
Potamotrygonidae (River stingrays) > Potamotrygoninae
Etymology: Potamotrygon: Greek, potamos = river + Greek, trygon = a sting ray (Ref. 45335); limai: Named for Dr. José Lima de Figueiredo, kindly known as Zé Lima, a highly esteemed Brazilian ichthyologist who has contributed immensely to the development of ichthyology in South America..
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性. Tropical
South America: Brazil (Jamari River, upper Madeira River basin).
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 64.8 cm WD オス/雌雄の選別がない; (Ref. 94972)
簡単な記述
検索表 | 形態学 | 形態計測学
脊つい: 117 - 130. This species can be diagnosed from other congeners by having the following combination of features: dorsal disc with a dark brownish background, covered with beige to whitish, closely packed small spots roughly arranged in small concentric patterns, these wider toward disc margins, without ocelli; whitish spots may be closely set forming vermicular patterns; lower back portion of disc with a characteristic roughly polygonal pattern, interspersed with small light spots; rostral dermal denticles fairly simple, composed of a single central crown and star-shaped base, with central and posterior disc denticles presenting star-shaped crown ridges, mostly with anterior and lateral dichotomies; two to three irregular rows of hook-shaped spines on dorsal tail midline. This differs from other amazonian Potamotrygon species (P. motoro (Müller & Henle, 1841), P. boesemani Rosa, Carvalho & Wanderley, 2008, P. signata Garman, 1913, P. leopoldi Castex & Castello, 1970, P. henlei (Castelnau, 1855), and the doubtful Potamotrygon ocellata (Engelhardt, 1912) by lacking any form of discrete dorsal ocelli or circular or irregular spots larger than eye-diameter. This is distinguished from P. schroederi Fernandez-Yépez, 1958 and P. tigrina Carvalho, Sabaj Pérez & Lovejoy, 2011 by presenting small dorsal beige to white spots arranged in concentric patterns, slightly greater than eye-diameter, and without banded pattern of alternating yellow and dark brown bands on tail (vs. much larger spots in vivid yellow with black pigmentation pattern and evidently banded tail); from P. orbignyi (Castelnau, 1855) and P. humerosa Garman, 1913 by its characteristic dorsal color pattern composed of small spots forming whitish polygonal patterns, especially on lower back region (vs. a broad, dark reticulate pattern spread over most of disc, usually without accessory spots) and a relatively smaller head region, longer tail, and also by the lack of disc tubercles (sometimes present in latter species); from P. falkneri Castex & Maciel, 1963 and P. tatianae Silva & Carvalho, 2011 by a darker brown dorsal backgroung color, its characteristic polygonal vermicular pattern on posterior disc, and shorter tail (means of 86.3% DW vs. 93.5% DW in P. falkneri and 109% DW in P. tatianae). It differs further from P. scobina Garman, 1913 by the absence of dorsal ocelli, by a much shorter tail (means of 86.3% DW vs. 121.5% DW), by a broader tail base (means of 14.8% DW vs. 13.4% DW), and by presenting 2?3 rows of midtail spines (vs. 1?2 rows in P. scobina). In addition, apart from P. scobina, P. limai is the only species of Potamotrygon which possesses three angular cartilages (vs. one or two in all other species) (Ref. 94972).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生
Fontenelle, J.P., J.P.C. Da Silva and M.R. De Carvalho, 2014. Potamotrygon limai, sp. nov., a new species of freshwater stingray from the upper Madeira River system, Amazon basin (Chondrichthyes: Potamotrygonidae). Zootaxa 3765(3):249-268. (Ref. 94972)
Human uses
用具
特記事項
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [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).
栄養段階 (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): High vulnerability (58 of 100).
