分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes) >
Trichomycteridae (Pencil or parasitic catfishes) > Trichomycterinae
Etymology: bortayro: Named for Gonzalo Padilla Bortayro, who first collected material of this species and brought it to the attention of the authors.
Eponymy: Dr Silvina Adela Menu-Marque is an Argentinean zoologist at the Department of Biological Sciences, University of Buenos Aires, where her doctorate was awarded (2002). [...] Gonzalo Padilla Bortayro is an Argentine biologist who is responsible for biodiversity monitoring of the activities of Minera Alumbera, a mining group for which he works, in the Catamarca region. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 居于水底的. 热带
South America: artificial wells in western Argentina.
南美洲: 人造的在阿根廷西部涌出。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 2.8 cm SL 雄鱼/尚未辨别雌雄; (Ref. 55738)
简单描述
检索表 | 型态特徵 | 形态测量图
背的软条 (总数) : 9; 臀鳍软条: 8 - 10. Differs from other species of the subfamily Trichomycterinae by the extreme elongation of the opercle and narrow odontode-bearing distal plate. Further differs by having elongated and curved coronoid process of the lower jaw. The lack of pelvic fin and girdle further differs this species from all other Trichomycterinae except Eremophilus mutisii, E. candidus and Trichomycterus catamarcensis, species that are readily distinguished from Silvinichthys bortayro by their coloration pattern. The pale integumentary pigmentation and reduction of the eyes are troglomorphic characters that are paralleled only in cave-dwelling species Trichomycterus itacarambiensis and T. chaberti among presently known trichomycterines. Can be easily distinguished from those two species by its proportionally much shorter body and fewer pectoral-fin rays (6 vs 7 and 10, respectively). Further differs except Silvinichthys mendozensis by the absece of a latero-sensory canal branch in the frontal and sphenotic; and also differs from S. mendozensis in having 6 versus 7 or 8 pectoral-fin rays and the absence versus presence of the pelvic fin and girdle (Ref. 55738).
有别于其他亚科 Trichomycterinae 的种鳃盖的藉由极端伸长与狭窄的齿-生长着末梢部的碟。 进一步不同之处为有细长的而且弯曲下面颌的下颚齿骨冠突。 缺乏腹鳍与肢带骨进一步不同除了 马氏沙毛鼻鲶〔Eremophilus mutisii〕 , E. candidus 与 Trichomycterus catamarcensis 以外的来自所有的其他 Trichomycterinae 的这种,种轻易地那是与他们的颜色图案的 Silvinichthys bortayro 區分。 灰白的 integumentary 顏色與眼的減少是穴居形的特徵那是平行的只在目前知道的 trichomycterines 之中的穴居種 厚唇毛鼻鯰〔Trichomycterus itacarambiensis〕 與 T. chaberti 中。 用它的比例非常短的身體與較少的胸鰭鰭條可能是與容易地區分的那些二個種。 (6 相對 7 與 10, 分別地) 進一步在額骨與蝶骨中除了 Silvinichthys mendozensis 以外不同藉由 latero- 知覺管分支的 absece; 以及有別於 S. mendozensis 對 7 或者 8個胸鰭鰭條與缺乏有 6 對有腹鰭而且以腰帶束縛.(參考文獻 55738)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 人造的在阿根廷西部涌出。
Fernández, L. and M.C.C. de Pinna, 2005. Phreatic catfish of the genus Silvinichthys from southern South America (Teleostei, Siluriformes, Trichomycteridae). Copeia 2005(1):100-108. (Ref. 55738)
世界自然保护联盟红皮书 (Ref. 130435: Version 2024-2)
濒危 (EN) (B1ab(iii)); Date assessed: 01 November 2020
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00279 - 0.01564), b=2.99 (2.79 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
