Isbrueckerichthys Derjist 1996


Isbrueckerichthys duseni, photo by K.S. Cummings

Isbrueckerichthys is a small genus of Neoplecostominae with plates on the abdomen. The following is an excerpt from Armbruster (1997)


Species of Isbrueckerichthys are small- to medium-sized loricariids that appear very similar to Pareiorhaphis.  Color pattern is usually mottled dark brown with the abdomen white.  Some small, deeply embedded plates are on the abdomen.  Caudal fin straight, angled posteroventrally, to slightly emarginate.  Four or more predorsal plates.  Five to eight rows of plates on the caudal peduncle.  Eyes typically small.  Dorsal fin short, never reaching the adipose fin.


Isbrueckerichthys differs from nearly all other loricariids by lacking a dorsal fin spinelet.  Isbrueckerichthys is most similar in appearance to Pareiorhaphis and Neoplecostomus, but has five or more rows of plates on the caudal peduncle (vs. at least one column of three rows).  Isbrueckerichthys further differs from Pareiorhaphis by lacking a large, ventrally deflected canal plate, lacking a well-developed posterior process of the cleithrum, and having some small, embedded plates on the abdomen.  Isbrueckerichthys further differs from Neoplecostomus by having elongated odontodes on the heads of breeding males and by having a less developed abdominal shield of plates.  Also similar to Pareiorhina from which it differs by having abdominal plates and an adipose fin and lacking the posterior process of the cleithrum.

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