Cat-eLog Right Arrow Trichomycteridae Right Arrow Sarcoglanidinae Right Arrow Ammoglanis

Down arrow Cat-eLog Data Sheet
Scientific Name Ammoglanis multidentatus  Costa, Mattos & Santos, 2019
Common Name
Type Locality Rio Caldeirão, Rio Paraguaçu basin, Município de Lençóis, Estado da Bahia, Brazil, 12°39'33"S, 41°22'13"W, elevation about 340 meters.
Etymology Latin multidentatus, meaning “with many teeth”, an allusion to the numerous opercular odontodes (15-16), unique among sarcoglanidines.
Down arrow Species Information
Size 20mm or 0.8" SL. Find near, nearer or same sized spp.
Identification Ammoglanis is a genus of diminutive slender trichomycterids. Its original description identified three unique traits for the genus: 1) slender quadrate, its maximum depth about 30% of length of its main axis; 2) expanded anterior tip of interopercle; and 3) premaxilla located posterior to mesethmoid cornu.

Ammoglanis multidentatus is distinguished from all other sarcoglanidines by the presence of a ventral process on the sesamoid supraorbital, in contact with the latero-posterior process of the autopalatine (vs. process absent), a prominent dorso-lateral process on the premaxilla (vs. process absent), more opercular odontodes (opercular odontodes 15 - 16, vs. 7 - 11), and a long anteroventral process of the opercle, its length about equal the length of the opercle main axis excluding the odontode patch (vs. about one third to half length). A. multidentatus is also distinguished from all congeners in having a long sesamoid supraorbital, its length about thrice the antorbital length (vs. sesamoid supraorbital only slightly longer than the antorbital in A. amapaensis and A. diaphanus, and sesamoid supraorbital rudimentary in A. pulex), a robust opercle, its depth excluding dorsal and anteroventral processes slightly larger than the width of the dorsal extremity of the hyomandibula (vs. narrower), and more pelvic-fin rays (total of 6, vs. 4 or 5).
Down arrow Habitat Information
Distribution Found in a single locality, the Rio Caldeirão, a tributary of the Rio São José, which is among the main tributaries of the upper Rio Paraguaçu River, Brazilian semiarid Caatinga.
Bahia State Rivers, Paraguaçu, São José (Bahia) (click on these areas to find other species found there)

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IUCN Red List Category Not Evaluated
Down arrow Husbandry Information
Feeding Diet consists of molluscs, crustaceans, other aquatic creatures and plant detritus.
Furniture In nature, found in a blackwater river, the bottom covered with sand and rocks, and scarce submerged riparian vegetation.
Compatibility In nature, found with Aspidoras psammatides and Geophagus diamantinensis, both psammophilic species.
Breeding Unreported.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Vertebrate Zoology v. 70 (no. 1), pp 62, Figs. 1-2.
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Last Update 2020 Jul 25 11:42 (species record created: 2004 Oct 29 00:00)