分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes)
鯰形目 (Catfishes) >
Sisoridae (Sisorid catfishes)
吸口鯰科 (Sisorid catfishes) > Glyptosterninae
Etymology: Pseudexostoma: Greek, pseudes = false + Greek, exo = outside + Greek, stoma = mouth (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的. 溫帶
Asia: known only from the middle and lower Nujiang (= Salween) basin, China.
亞洲: 已知只來自中下游的怒江 (= 薩爾溫江) 流域，中國了。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 15.3 cm SL 雄魚/尚未辨別雌雄; (Ref. 57980)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 5; 臀鰭軟條: 3 - 4. This species is distinguished from Pseudexostoma yunnanensis by the following characters: posterior margin of lower lip with 3 notches, depth of middle one shallower than lateral ones (vs. same depth), length of 2 smaller median lobes of lower lip longer than lateral lobes (vs. the same length); pelvic fin i, 3-4 (vs. i, 5); base of adipose fin longer, 36.1-46.0% SL (vs. 28.8-39.8); caudal peduncle more slender, depth 4.2-6.9% SL, 20-33.7% in length of caudal peduncle (vs. 6.4-8.3 and 32.6-42.7); premaxillary tooth band with 16-18 teeth (vs. 18-22), it is divided into 2 and are isolated (vs. connected partially). The species differs from P. longipterus in having a shorter pectoral fin 24.9-29.8% SL (vs. 30.1-31.3), pelvic fin 16.1-22.9% SL (23.1-24.3), and caudal fin 13.6-17.9% SL (vs. 18-19.6); smaller eyes and a narrower interorbital width, eye diameter 5.8-7.8% HL (vs. 8.2-10), interorbital width 19.7-24.7% HL (vs. 25.5-30.8) (Ref. 57980).
這種在特徵之後被與 Pseudexostoma yunnanensis 區分藉由: 下唇的後緣有三個凹槽，中央的深度一個淺於側面的一些 (vs. 相同的深度), 下唇長度超過側葉的 2個比較小的中央葉的長度;(vs. 相同的長度) 腹鰭 i, 3-4;(vs. i, 5) 脂鰭的基底更長的, 36.1-46.0% SL;(vs.28.8-39.8) 尾柄更細長的, 深度 4.2-6.9% SL, 尾柄的 20-33.7% 長;(vs.6.4-8.3 與 32.6-42.7) 具有 16-18個齒 (vs.18-22) 的上頜骨前的齒箍, 它被分開成 2 而且被隔離.(vs. 連接部份地) 此魚種在有一個方面有別於 P. longipterus 較短的胸鰭 24.9-29.8% SL(vs.30.1-31.3) ，腹鰭 16.1-22.9% SL(23.1-24.3) 與尾鰭 13.6-17.9% SL;(vs.18-19.6) 較小的眼與較狹窄的眼間骨寬度，眼直徑 5.8-7.8% HL(vs.8.2-10) ，眼間骨寬度 19.7-24.7% HL(vs.25.5-30.8).(參考文獻 57980)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
亞洲: 已知只來自中下游的怒江 (= 薩爾溫江) 流域，中國了。
Zhou, W., Y. Yang, X. Li and M.-H. Li, 2007. Review of the catfish genus Pseudexostoma (Siluriformes: Sisoridae) with description of a new species from the Upper Salween (Nujiang) Basin of China. Raffles Bull. Zool. 55 (1):147-155. (Ref. 57980)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00589 (0.00264 - 0.01315), b=3.08 (2.88 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
