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Aphanotorulus horridus (Kner, 1854)

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Relevant Information:

Given the L-numbers of Squaliforma sp. L290 and L291 (being the juvenile form) in the German Datz publication of March 2001. Was originally described as Hypostomus horridus by Rudolf Kner in 1854, although it was transferred to the genus Squaliforma (now considered invalid) after the genus' designation by I. J. H. Isbrücker, I. Seidel, J. Michels, E. Schraml, and A. Werner in 2001. In 2004, Jonathan W. Armbruster classified the species within Hypostomus instead of Squaliforma. In 2016, following a review of Isorineloricaria and Aphanotorulus by C. Keith Ray and Armbruster (both of Auburn University), the species was reclassified as a member of Aphanotorulus, although FishBase still lists the species as Squaliforma horrida. This 2016 review also found three other former Squaliforma species (S. biseriata, S. scopularia, and S. virescens) to be synonymous with A. horridus. Description: Mouth with papillae and upper lips have protrusions. Sexual Differences: Similar to the Hypostomus genera but with the males having bristles on the odontodes mainly on the posterier of the body during spawning time. Aquarium Care: Relatively easy to keep with higher temperatures and a fine sand substrate. Diet: Not fussy and will eat most prepared aquarium foods such as tablet, frozen and live foods. Etymology: The specific name horridus: Latin for bristly or rough, referring to slightly keeled lateral scutes on body, each keel terminating in several small hooks.

Common Name:

L290, L291, Long Head Pleco

Synonyms:

Hypostomus horridus, Squaliforma horrida

Family:

Loricariidae

Distribution:

South America: Amazon River basin (Bolivia, Brazil, Colombia and Peru). Type locality: Forte do Principe, Rio Guaporé, Brazil.

Size:

35.0cm. (14ins)

Temp:

25-29°c (77-85°f.)

p.H.

6.5-7.5.

IUCN Red List

Aphanotorolus horridus occurs in Peru, Ecuador, Bolivia, and in Brazil it is widely distributed in the Amazon basin in a region that includes large portions of well-preserved areas and Conservation Units. There are no known threats that indicate a risk of extinction in the near future. Therefore, A. horridus has been categorised as Least Concern (LC), (IUCN 2023).

Reference:

All L-Numbers Datz Special.
Instituto Chico Mendes de Conservação da Biodiversidade (ICMBio). 2023. Aphanotorulus horridus. The IUCN Red List of Threatened Species 2023.
Isbrucker, I., Seidel, I., Michels, J., Schraml, E., & Werner, A. (2001). Diagnose vierzehn neuer Gattungen der Familie Loricariidae Rafinesque, 1815 (Teleostei, Ostariophysi).
Ray, C. K., & Armbruster, J. W. (2016). The genera Isorineloricaria and Aphanotorulus (Siluriformes: Loricariidae) with description of a new species. Zootaxa, 4072(5), 501–539.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.

Family: Loricariidae Back to Ident-A-Cat Click on Thumbnails

Aphanotorulus horridus

Aphanotorulus horridus
Dorsal view

Aphanotorulus horridus
Ventral view

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