Plesioheros chauliodus, Perez & Malabarba & Papa, 2010

Perez, Patricia Alano, Malabarba, Maria Claudia & Papa, Cecilia del, 2010, A new genus and species of Heroini (Perciformes: Cichlidae) from the early Eocene of southern South America, Neotropical Ichthyology 8 (3), pp. 631-642 : 633

† Plesioheros chauliodus , new species

Figs. 2-6

Holotype. CNS-V10026, an articulated individual preserved as an impression in lateral view, with the posteroventral region of the body missing ( Fig. 2 ).

Locality. Alemanía, northwestern Argentina, level Faja Verde II, Lumbrera Formation, Lower Eoceno (~ 48 Ma).

Diagnosis. As for the genus.

Etymology. From the Greek word chauliodous (χαυλιοδουσ), meaning having large teeth, referring to the enlarged dentary teeth of the specimen. Treated as noun in apposition.

Figures

Fig. 2. †Plesioheros chauliodus, CNS-V10026, holotype. (A) photograph of, (B) cast in latex of the holotype (reversed) sprinkled with ammonium chloride, (C) outline of the fossil with fins and scales.

Fig. 3 (next column). †Plesioheros chauliodus, CNS-V10026. Skull in lateral view: (A) original fossil impression, (B) cast in

Fig. 4. †Plesioheros chauliodus, CNS-V10026. Photograph (A) and drawing (B) of oral jaws; (C) detail of anterior dentary teeth.

Fig. 5. †Plesioheros chauliodus, CNS-V10026. Precaudal region showing the dorsal border of caudal peduncle with procurrent rays. Abbreviations: cp, dorsal margin of caudal peduncle; dr, dorsal-fin rays; llc, lateral line canal; ns, neural spine; pr, procurrent rays; sl, scale.

Fig. 6. †Plesioheros chauliodus, CNS-V10026. Predorsal region showing supraneural bones and squamation. Abbreviations: dp, dorsal pterygiophore; fs, dorsal-fin spine; ns, neural spine; sc, supraoccipital crest; sl, scale; sn, supraneural.