分类 / Names
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Teleostei >
Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypostominae
Etymology: Pseudancistrus: Greek, pseudes = false + Greek, agkistron = hook (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 居于水底的. 热带
South America: Venezuela.
南美洲: 委内瑞拉。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 17.6 cm SL 雄鱼/尚未辨别雌雄; (Ref. 53269)
简单描述
型态特徵 | 形态测量图
Pseudancistrus sidereus is diagnosed by a unique modification of the ventral plates on the caudal peduncle. In loricariids, the plates of the ventral row on the caudal peduncle are typically bent at an approximately 90° angle to follow the contour of the body. The bend is often the site of a slight keel formed from one or more rows of slightly longer odontodes. In P. sidereus, the keel is accentuated by having the dorsal laminae of the plates strongly concave. Although some loricariids may have the dorsal laminae slightly concave, it is much more pronounced in P. sidereus. Pseudancistrus sidereus can be separated from all other species of the Ancistrini by the presence of the keel mentioned above and by the presence of a single large white to yellow spot located at the center of the posterior lateral plates. The only species with a similar coloration are some Hypancistrus and some Panaque, both of which have far fewer than 25 teeth per jaw ramus (vs. much more than 25 teeth), some other species of Pseudancistrus which have hypertrophied odontodes along the snout in males and females (vs. no hypertrophied snout odontodes), and have the dorsal fin reaching at least the preadipose
plate when depressed (vs. about two plates anterior to preadipose plate); and some Hemiancistrus and Peckoltia which generally have the spots much more diffuse (vs. borders of spots distinct) and have the dorsal fin reaching at least the preadipose plate when
depressed (vs. about two plates anterior to preadipose plate) (Ref 53964).
Pseudancistrus sidereus 在尾梗上被腹碟的一个独特变异鉴定。 在甲鲶科中，在尾梗上的腹列的碟典型地被弯曲在一大约 90个 ° 角跟随身体的轮廓。 弯曲轻微龙骨脊的位置从一个或多个列的些微比较长的齿形成时常。 在 P. sidereus 中，龙骨脊被强调借着具有碟的背部叶片强烈凹的。 虽然一些甲鲶科可能有背部叶片些微地凹曲, P. sidereus 中更加明显. Pseudancistrus sidereus 能被分开全部其他種 Ancistrini 藉由有在上面被提到的龍骨脊而且藉由有位於後面的側骨板的中心的一個大的白色到黃色的斑點。 唯一的種具有一個相似的顏色是一些 Hypancistrus 與一些 Panaque, 那裡有遙遠少於每頜分支 (vs. 多超過 25個齒)25個齒都有, 一些其他種的 Pseudancistrus 那裡有肥大齒沿著在雄性與雌性 (vs. 沒有肥大的吻齒) 中的吻, 而且有達到至少 preadipose 的背鰭
碟當扁平的;(vs. 大約二個碟位於 preadipose 碟前) 而且一些 Hemiancistrus 與通常有斑點更多擴散 (vs. 斑點的邊緣明顯的) 而且有達到至少 preadipose 碟的背鰭的 Peckoltia 當
扁平的 (vs. 大約二個碟位於 preadipose 碟前)(參考文獻 53964) 。
Facultative air-breathing in the genus (Ref. 126274)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 委内瑞拉。
Armbruster, J.W., 2004. Pseudancistrus sidereus, a new species from southern Venezuela (Siluriformes: Loricariidae) with a redescription of Pseudancistrus. Zootaxa 628:1-15. (Ref. 53269)
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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=0.01514 (0.00712 - 0.03216), b=2.97 (2.80 - 3.14), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
回复力 (Ref.
120179): 高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (11 of 100).
