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Teleostei >
Siluriformes (Catfishes) >
Cetopsidae (Whale catfishes) > Cetopsinae
Etymology: Cetopsidium: From Cetopsis, the first genus proposed in subfamily Cetopsinae, and 'idium' meaning diminutive, referring to the relatively small body sizes of the members of the genus; soniae: The species name, soniae, is in honor of Dr. Sonia Fisch-Muller of the Muséum d’histoire naturelle, Geneva, who brought the species to our attention, has been of invaluable assistance to both authors with a number of projects over the years, and ha.
Eponymy: Dr Sonia Fisch-Muller is a professor at the Department of Herpetology and Ichthyology, Muséum d’histoire naturelle, Geneva. She co-wrote: Three new species of Ancistrus (2005). She brought Cetopsidium soniae to the authors’ attention. (See also Muller, S) (Ref. 128868), visit book page.
More on authors: Vari & Ferraris.
Environment: milieu / climate zone / 深度上下限 / distribution range
生态学
; 淡水 底中水层性.
分布
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South America: Guyana. Cetopsidium soniae is known from the type locality in the Manari River, a tributary of the Takutu River in the western portions of the rio Branco system of the Amazon basin (Ref. 82380).
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 3.1 cm SL 雄鱼/尚未辨别雌雄; (Ref. 82380); 3.6 cm SL (female)
简单描述
检索表 | 型态特徵 | 形态测量图
Cetopsidium soniae differs from its congeners in the posterior extent of the pelvic fin (falling distinctly short of the vent versus extending beyond the vent and reaching to the origin of the anal fin in C. minutum (Eigenmann, 1912), and reaching to or slightly beyond the anterior limit of the vent in C. ferreirai Vari, Ferraris & de Pinna, 2005, C. morenoi (Fernández-Yépez, 1972), C. orientale (Vari, Ferraris & Keith, 2003), and C. pemon Vari, Ferraris & de Pinna, 2005, the position of the vent (proximate to the base of the anterior most anal-fin ray versus distinctly anterior to that location in C. roae Vari, Ferraris & de Pinna, 2005), the form of the first rays of the dorsal and pectoral fins (with distal filaments present in males versus without such sexually-dimorphic filaments in C. ferreirai), the orientation of the dorsal and ventral profiles of the postdorsal portion of the body (converging posteriorly versus running in parallel in C. orientale), the distribution of dark pigmentation on the body (with pigmentation distributed across dorsal and lateral surfaces of body versus limited to middorsal region in C. ferreirai), the degree of dark pigmentation on the ventral surface of the lower jaw (with
limited or no pigmentation versus with broad band of pigmentation in C. orientale), the form of the pigmentation on the head and body (chromatophores large and stellate versus small and round in C. minutum and C. pemon), the extent of the pigmentation on the dorsal fin (without any pigmentation or at most several small dark basal spots versus with distinct semicircular dark spot basally in C. morenoi, C. orientale, and
C. pemon), the body depth (0.17-0.18 versus 0.14-0.15 of SL in C. roae), and the form of the head in lateral view (triangular overall but relatively deep posteriorly versus more acutely triangular in C. minutum [see Vari et al., 2005).
Body shape (shape guide): elongated.
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
Vari, R.P. and C.J. Ferraris Jr., 2009. New species of Cetopsidium (Siluriformes: Cetopsidae: Cetopsinae)from the upper rio Branco system in Guyana. Neotrop. Ichthyol. 7(3):289-293. (Ref. 82380)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-1)
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Estimates based on models
Phylogenetic diversity index (参考文献
82804): PD
50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00207 - 0.01214), b=3.14 (2.93 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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