Profundal Whitefish

description

Description. General appearance is shown in Figure 9. Morphological and meristic characters of both sexes can be found in Table 8 and Suppl. material 1: Table S 6 and first- and second-best ratios for both sexes combined can be found in Table 10. The description is valid for both sexes. Shape: Body elongate. Slender bodied with greatest body depth anterior of the dorsal fin. Dorsal and ventral profile similar and slightly arched. Dorsal and ventral profile from tip of snout to interorbital area mostly straight and then slightly convex to dorsal and pelvic fin origin respectively. Head long. Snout often 60 ° angle to the body axis anterior of the eye, such that the profile from the tip of the snout to the vertical projection where the anterior part of the eye crosses the dorsal profile is straight and afterwards slightly convex. Mouth is wide (i. e., width of upper and lower jaw), rather short and mostly strongly sub-terminal and only rarely terminal. Snout is weakly pronounced, since the tip of the snout is often fleshy and roundish. Eye rather large with a large eye cavity and a thick and triangular eye-socket (i. e., sickle-shaped). Pectoral fin long and moderately tapered. Dorsa

A taxonomic revision of the whitefish of lakes Brienz and Thun, Switzerland, with descriptions of four new species (Teleostei, Coregonidae)

diagnosis

Diagnosis. Coregonus profundus is a small whitefish species with moderate pigmentation of all fins and the body; brown-orange colouration on the flanks above the lateral line; elongate slender body; long head; large eye with a thick and triangular shaped eye socket; tip of snout is fleshy and roundish; few (15 - 27) and short gill rakers.

A taxonomic revision of the whitefish of lakes Brienz and Thun, Switzerland, with descriptions of four new species (Teleostei, Coregonidae)

etymology

Etymology. The adjective profundus means deep in Latin and is used for C. profundus to describe the species unique ecology of living and breeding in great depths in Lake Thun.

A taxonomic revision of the whitefish of lakes Brienz and Thun, Switzerland, with descriptions of four new species (Teleostei, Coregonidae)

materials_examined

Material examined. Holotype. NMBE- 1077208, Switzerland, Lake Thun (46 ° 40 ' N, 7 ° 46 ' E), 194 mm SL, male. Paratypes. NMBE- 1077161 - 1077179, NMBE- 1077203 - 1077207, NMBE- 1077209 - 1077211, Switzerland, Lake Thun (46 ° 40 ' N, 7 ° 46 ' E), N = 27, 188 - 316 mm SL.

A taxonomic revision of the whitefish of lakes Brienz and Thun, Switzerland, with descriptions of four new species (Teleostei, Coregonidae)