Classification / Names
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Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypoptopomatinae
Etymology: Rhinotocinclus: Greek, 'Pnivqc' (Rhinos) = beak, snout + Greek, 'Otocinclus' = a genus of Hypoptopomatinae; in reference to the conspicuous and elegant snout of most of its species (Ref. 128924); variola: Named from the Latin variola, meaning smallpox, spotted, in allusion to the dark dots
that cover all dorsal and ventral body surfaces. A noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
นิเวศวิทยา
; น้ำจืด สัตว์น้ำหน้าดิน. Tropical
South America: Quebrada Tacana, a tributary to the Amazon River in Colombia.
ขนาด / น้ำหนัก / Age
Maturity: Lm ? range ? - ? cm
Max length : 2.9 cm SL เพศผู้/กระเทย; (Ref. 100824)
Short description
เครื่องมือที่ใช้ในการแยกชนิดสัตว์,สิ่งมีชีวิตออกจากกัน | สัณฐานวิทยา | ความยาวต่างๆ
เงี่ยงครีบหลัง (รวม) : 1; ก้านครีบอ่อนที่หาง (รวม) : 7; ก้านครีบอ่อนที่ก้น: 6. Parotocinclus variola can be distinguished from all other congeners from northeastern to southeastern Brazilian rivers in having the cheek canal plate elongated posteriorly on the ventral surface of head and contacting the cleithrum. It differs from P. collinsae (Essequibo River basin, Guiana) and P. halbothi (rio Trombetas basin, Brazil and Marowijne River, Suriname), by the presence of a triangular patch of dark pigmentation on the anterior portion of the
dorsal-fin membrane, by the absence of unicuspid accessory teeth on both the premaxilla and dentary, and by having a Y-shaped light mark on the snout . It can be separated from all other species of Parotocinclus from Amazon, Orinoco and the Guianas by possessing a pigmentation pattern consisting of conspicuous dark dots smaller than a pupil diameter, broadly distributed dorsally and ventrally. It further differs from P. eppleyi (Orinoco basin), P. longirostris, P. amazonensis (Amazon basin) and P. britskii (Orinoco and coastal drainages of the Guianas) by having the central abdominal plates arranged in a single series between the lateral abdominal plates, from the coracoid to the preanal plate and with a wide naked area at the pelvic-fin base (vs. arranged in two or more series between the lateral abdominal plates and without wide naked area at the pelvic-fin base). It can be further diagnosed from P. eppleyi, P. longirostris, and P. polyochrus by having a Y-shaped, light mark on the snout only (vs. Y-shaped, light mark present on both the snout and head). It can be further distinguished from its congeners in having more oral teeth: 38-46 premaxillary and 39- 46 dentary teeth (Ref. 100824).
Facultative air-breathing in the genus (Ref. 126274); Occurs in Quebrada Tacana, a blackwater creek with sandy bottom. Average rainfall
in the sampling area is 3,400 mm/year and average temperature is 25.5° C (Ref. 100824).
Life cycle and mating behavior
วัยเจริญพันธุ์ | การสืบพันธุ์ | การวางไข่ | เซลสืบพันธ์ของเพศเมีย(ไข่) | ความดกของไข่ | ตัวอ่อน
Lehmann, A.P., L.J. Schvambach and R.E. Reis, 2015. A new species of the armored catfish Parotocinclus (Loricariidae: Hypoptopomatinae), from the Amazon basin in Colombia. Neotrop. Ichthyol. 13(1):47-52. (Ref. 100824)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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Special reports
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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=0.00851 (0.00374 - 0.01935), b=3.09 (2.90 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
ระดับชั้นอาหาร (Ref.
69278): 2.5 ±0.1 se; based on size and trophs of closest relatives
ความสามารถในการกลับคืนสู่ปกติ (Ref.
120179): ความสูง, เวลาต่ำสุดที่จะทำให้ประชากรเพิ่มขึ้นเป็น 2 เท่าใช้เวลาน้อยกว่า 15 เดือน (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
