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Data CROSSOCHEILUS ELEGANS, A NEW SPECIES OF FISH FROM NORTHERN B...
Article Crossocheilus elegans, a new species of fish from Northern B...
Kottelat and Tan say:
The rostral lobe is an elongate conical structure, with a conspicuous conical tubercle at its tip and a series of conical and starry tubercles along its lower edge. It is encased in a widened sublachrymal groove (which borders the rostral fold) and surrounds the rostral barbel. The lobe is movable, and can rotate upwards along a more or less longitudinal axis to reach a position above the sublachrymal groove.
In the photograph of USNM 090302, the holotype of Epalzeorhynchos siamensis , or siamense, ῥύγχος is neuter, similar rostral lobe is distinct, and a member of the staff of USNM wrote to me that it is movable. The literature in contrary claims that this taxon belongs to the genus Crossocheilus, in which the rostral lobe is immovable. I wonder who tested that the rostral lobe is immovable in this specimen.
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