Phocoena dioptrica Lahille 1912

• Main Authors: Russell A. Mittermeier, Don E. Wilson
• Format: Other/Unknown Material
• Language: unknown
• Published: Lynx Edicions 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Mammalia; Cetacea; Phocoenidae; Phocoena; Phocoena dioptrica; Antarc*; Antarctic; Phocoena phocoena; Spectacled porpoise; Tierra del Fuego
• Online Access: https://doi.org/10.5281/zenodo.6607569; http://treatment.plazi.org/id/03B887D96B2FFFB8FF137123F8358C69

3. Spectacled Porpoise Phocoena dioptrica French: Marsouin a lunettes / German: Brillenschweinswal / Spanish: Marsopa de anteojos Other common names: Spectacled Dolphin Taxonomy. Phocaena dioptrica Lahille, 1912, Argentina, Buenos Aires, “capturado en Punta Colares, cerca de Quilmes.” This species is monotypic. Distribution. Southern Hemisphere (E South America from S Brazil to Tierra del Fuego, Falkland Is (= Malvinas), South Georgia Is, Kerguelen Is, Heard I, Macquarie I, Auckland Is, and Tasmania). Although previously thought to be exclusively coastal, like other members of the genus, recent sightings in oceanic waters of the Antarctic and subantarctic zones suggest that the species actually has a circumpolar distribution and may be largely oceanic. Descriptive notes. Total length 150-224 cm; weight 50-115 kg. Spectacled Porpoises are relatively large members of the genus, reaching total body lengths of 224 cm for males and 204 cm for females. Males are larger than females and also have much larger dorsal fins, which become oval-shaped and proportionately very large. Leading and trailing edges of dorsalfins are both convex. Females and young have dorsal fins more typical in size and shape for the genus. There is only a slight or no beak, and flippers are small, with rounded tips. Color patternis striking, two-tone black and white. Dorsal surface and upper sides are black, and belly and lowersides are white. Boundary between the two is very distinct and runs along flanks. A white “spectacle” surrounds each eye. There are black lip and eye patches, and several dark stripes from the gape that run toward the flipper. A faint gray post-dorsal fin saddle may be visible in good lighting. Newborns have a much paler dorsal surface than adults. Tooth counts generally are 17-23 in each half of each jaw. Habitat. Variable habitats, including very deep, oceanic waters, but also in some rivers and turbid channels near shore. Spectacled Porpoises appear to prefer cold waters, with temperatures of 1-10°C, but in fact,little ...