Corymbophanes, EIGENMANN, 1909

Armbruster, Jonathan W., 2004, Phylogenetic relationships of the suckermouth armoured catfishes (Loricariidae) with emphasis on the Hypostominae and the Ancistrinae, Zoological Journal of the Linnean Society 141 (1), pp. 1-80 : 59-60

GENUS CORYMBOPHANES EIGENMANN, 1909

Type species: Corymbophanes andersoni Eigenmann, 1909

Includes:

Corymbophanes andersoni Eigenmann, 1909 Corymbophanes kaiei Armbruster & Sabaj, 2000 (in Armbruster et al., 2000)

Diagnosis: Corymbophanes is not diagnosed by any unique characteristics. Those considered synapomorphic are: mesial surface of first epibranchial forming a blade (15: 1), anterior-facing process on the fourth epibranchial very long (16: 1; Fig. 12B ), upper pharyngeal tooth plate round, teeth uniformly distributed (30: 0), hyomandibula deflected beyond posterior margin (46: 1), anterior process of metapterygoid spoonshaped (58: 1), exit of preopercular latero-sensory canal anterior to posteroventral edge of quadrate (62: 1), preopercular latero-sensory canal extended posteriorly (63: 1), contact of canal plate with suspensorium present (85: 1), three or more preadipose plates (138: 0), and a postdorsal ridge of median unpaired plates (192: 1). See description and diagnosis of Corymbophanes in Armbruster et al. (2000).

Comparisons: Corymbophanes can be distinguished from all loricariids except some Chaetostoma , Leptoancistrus , and Hemipsilichthys nudulus by the presence of a postdorsal ridge made up of several median, unpaired plates and a lack of an adipose-fin membrane. Corymbophanes can be distinguished from Chaetostoma and H. nudulus by the presence of plates on the snout, from Chaetostoma and Leptoancistrus by the lack of evertible plates on the cheek and three (vs. five) rows of plates on the caudal peduncle, and from H. nudulus by having the sides and back completely plated (vs. partially unplated).

Figures

Figure 12. Fourth epibranchial, right side, dorsal view (slightly twisted anteriorly). A, Pterygoplichthys multiradiatus, INHS 29787. B, Hemipsilichthys cameroni, USNM 279585. Scale bars = 0.5 mm. Shaded area is cartilage. Arrows indicate anterior processes.