Sagmatias

Sagmatias is a genus that has been proposed for certain dolphin species that are currently placed in the genus Lagenorhynchus. Mitochondrial DNA studies have indicated that certain dolphin species within Lagenorhynchus are actually more closely related to dolphins within the genus Cephalorhynchus. In order to resolve this situation it has been proposed that the affected dolphin species be placed within the genus Sagmatias.[1] A recent cladistic analysis of oceanic dolphins provides morphological support for generic separation of Sagmatias from Lagenorhynchus.[2] Affected species are:

Sagmatias
Pacific white-sided dolphins (Lagenorhynchus obliquidens)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Family: Delphinidae
Subfamily: Lissodelphininae
Genus: Sagmatias

In addition, there is evidence that the hourglass dolphin (Lagenorhynchus cruciger) should also be placed within the new genus, although the evidence for this species is less conclusive.[7]

Under this categorization, Sagmatias, Cephalorhynchus and Lissodelphis form the subfamily Lissodelphininae within the dolphin family, Delphinidae.[1]

References
  1. Leduc, R.; Perrin, W. & Dizon, E. (August 18, 1998). "Phylogenetic Relationships among the Delphinid Cetaceans Based on Full Cytochrome B Sequences". Marine Mammal Science. 15 (3): 619–648. doi:10.1111/j.1748-7692.1999.tb00833.x. Archived from the original on June 4, 2012. Retrieved 2008-10-05.
  2. Mizuki Murakami, Chieko Shimada, Yoshinori Hikida, Yuhji Soeda and Hiromichi Hirano (2014). "Eodelphis kabatensis, a new name for the oldest true dolphin Stenella kabatensis Horikawa, 1977 (Cetacea, Odontoceti, Delphinidae), from the upper Miocene of Japan, and the phylogeny and paleobiogeography of Delphinoidea". Journal of Vertebrate Paleontology 34 (3): 491–511. doi:10.1080/02724634.2013.816720.
  3. Shirihai, H. & Jarrett, B. (2006). Whales, Dolphins and Other Marine Mammals of the World. Princeton Field Guides. pp. 202–205. ISBN 0-691-12757-3. OCLC 73174536.
  4. "The Vertebrates of British Columbia" (PDF). 2005. Archived from the original (PDF) on July 25, 2008. Retrieved 2008-10-05.
  5. Shirihai, H. & Jarrett, B. (2006). Whales, Dolphins and Other Marine Mammals of the World. Princeton Field Guides. pp. 205–207. ISBN 0-691-12757-3. OCLC 73174536.
  6. Shirihai, H. & Jarrett, B. (2006). Whales, Dolphins and Other Marine Mammals of the World. Princeton Field Guides. pp. 209–211. ISBN 0-691-12757-3. OCLC 73174536.
  7. Shirihai, H. & Jarrett, B. (2006). Whales, Dolphins and Other Marine Mammals of the World. Princeton Field Guides. pp. 207–208. ISBN 0-691-12757-3. OCLC 73174536.

COPE, E. D. 1866. Third contribution to the history of the Balaenidae and Delphinidae. Proceedings of the Academy of Natural Sciences of Philadelphia, 1866:293-300.

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