CORYMBOPHANINI, Armbruster, 2004

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 : 50-51

CORYMBOPHANINI

In this analysis, Corymbophanes is sister to all the other Hypostominae ( Fig. 37 ) and a monogeneric tribe, Corymbophanini , is described below. Corymbophanes is described in detail in Armbruster et al. (2000). Corymbophanes is known only from the Potaro River above Kaieteur Falls in western Guyana, and Armbruster et al. (2000) contend that it is a relict. Corymbophanes would likely be in direct competition with morphologically similar species of the Ancistrini , although no species of the latter are known from above Kaieteur Falls. Based on its range and phylogenetic position, it would be logical to speculate that Corymbophanes once had a larger range that has become restricted to the Upper Potaro, and that it persists there because there are no sympatric species of the Ancistrini .

Corymbophanes bahianus Gosline from Bahia, Brazil is actually Hemipsilichthys (see above). Schultz (1944) describes C. venezuelae from the Lago Maracaibo basin of Venezuela, although it is a species of Chaetostoma ( Isbrücker, 1980; Armbruster et al., 2000). Schaefer (1986) includes what he calls Corymbophanes in his analysis and he determines that it is amongst a polytomy with Hypostomus , Isorineloricaria , and the Ancistrini . I have examined the specimens he used and have found that they belong to Hypostomus . Schaefer (1987) also refers to these specimens of Hypostomus as Corymbophanes .

Figures

Figure 37. Relationships of the hypostomine tribes and taxa within the Corymbophanini, the Rhinelepini, the Hypostomini, and the Pterygoplichthini based on the ordered analysis. This is part of the strict consensus of 5098 most parsimonious trees of trees of 1328 steps, CI = 0.203, remainder of the strict consensus tree is in Figs 36 and 38. Numbers above the branches are clade numbers, numbers below are decay indices. 1Aphanotorulus, Cochliodon, and Isorineloricaria are placed in Hypostomus. 2The Hemiancistrus annectens group represents an undescribed genus, Hypostomus panamensis is now placed in Hemiancistrus. 3Glyptoperichthys and Liposarcus are placed in Pterygoplichthys.