A New Species of Parmaturus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from Brazil, Southwestern Atlantic
A new Southwestern Atlantic species of Parmaturus, P. angelae, new species, is described from two specimens captured off Brazil. It is distinguished from congeners by the following characters: origin of the first dorsal fin anterior to pelvic-fin origin, presence of well-developed upper and lower caudal crests of denticles, dorsal fins subequal, lateral denticles teardrop-shaped and lacking lateral cusplets, denticles evenly spaced, proportional dimensions, and vertebral counts. Parmaturus angelae, new species, is the second species of the genus reported from the Atlantic Ocean and only the third species outside of the Indo-West Pacific region. Parmaturus remains rather poorly defined as only two species have been studied anatomically in any detail.
Collection locations of the types of Parmaturus angelae, new species. Black star represents the holotype locality and black circle, the paratype locality.
Parmaturus angelae, new species, holotype, MZUSP 124000, female, 398 mm TL. (A) Dorsal view, (B) lateral view. Scale bar = 25 mm.
Parmaturus angelae, new species, paratype, MZUSP 124001, female, 425 mm TL. (A) Dorsal view, (B) lateral view. Scale bar = 25 mm. Parmaturus campechiensis, holotype, USNM 206184, female, 158.7 mm. (C) Dorsal view, (D) lateral view. Scale bar = 10 mm. Red lines indicate the origin of first dorsal fin and dark blue lines, origin of pelvic fins.
Parmaturus angelae, new species, MZUSP 124000, female, 398 mm TL. (A) Dorsal view of the head, (B) ventral view of the head. Scale bar = 20 mm.
Parmaturus angelae, new species, MZUSP 124001, female, 425 mm TL; teeth. a, anterior teeth; c, commissural; l, lateral. Scale bar = 100 μm.
Parmaturus angelae, new species, MZUSP 124001, female, 425 mm TL; lateral trunk denticles. (A, D) Region above pectoral fin; (B, E) region below first dorsal fin; (C, F) region below second dorsal fin. (A–C) Scale bar = 500 μm; (D–F) scale bar = 100 μm.
Parmaturus angelae, new species, MZUSP 124000, female, 398 mm TL; caudal crest of dermal denticles. Scale bar = 5 mm.
Egg capsules of Parmaturus angelae, new species, MZUSP 124001, female, 425 mm TL. Scale bar = 10 mm.
Contributor Notes
Associate Editor: M. P. Davis.