Talk:Oceanic dolphin

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The genus Pepinocephalia and Peponocephalia AND Peponocephala are propably all the same. However only one is correct. Google suggest cetacea, which is taken from Rice (1998) which is the standard in the field. That only mentions Peponocephala. Pete/Pcb21 (talk) 12:45, 5 Jan 2004 (UTC)

As does Lyall Watson's 1981 Sea Guide to Whales of the World (ISBN 0-09146-60-08). Other terms are likely mistakes rather than alternatives. Anjouli 12:56, 5 Jan 2004 (UTC)

Taxonomy: tribal relations

According to the article, the taxonomy of Delphinids is likely to change in the near future. Pending the results of future studies, how is the current consensus on the taxonomy of oceanic dolphins? In other words, how are the Delphinidae subdivided into tribes? Or are the interfamily relations in fact too uncertain to provide realistic tribal affinities of the respective genera? DaMatriX (talk) 01:12, 30 December 2009 (UTC)

I found the following two tables in LeDuc 2002, p. 311 and I was about to replace the list in the article but I got confused. Any opinions? --Fama Clamosa (talk) 08:02, 20 January 2013 (UTC)

Cunha et al. 2011, p. 1 agree with Delphininae (Tursiops+Stenella+Delphinus+Sousa) and Stenoninae (Sotalia+Steno). --Fama Clamosa (talk) 10:00, 20 January 2013 (UTC)

According to Cunha et al. 2011, p. 4, "it is not yet possible to ascertain the evolutionary relationships of all Delphinidae subfamilies, nor the monophyly of Lissodelphininae, which has been questioned[10,37]." Ref 37 is Harlin-Cognato & Honeycutt 2006 and according to them: "Overall, our study provides strong support for the monophyly of the subfamily Lissodelphininae and the polyphyly of the genus Lagenorhynchus." I'm confused. --Fama Clamosa (talk) 10:38, 20 January 2013 (UTC)

• LeDuc, Rick (2002). "Delphinids, Overview". In Perrin, William R; Wiirsig, Bernd; Thewissen, J G M (eds.). Encyclopedia of Marine Mammals. Academic Press. pp. 310–4. ISBN 0-12-551340-2. {{cite book}}: Invalid |ref=harv (help)
• Cunha, Haydée A; Moraes, Lucas C; Medeiros, Bruna V.; Lailson-Brito, Jr, José (2011). "Phylogenetic Status and Timescale for the Diversification of Steno and Sotalia Dolphins". PLoS One. 6 (12): e28297. doi:10.1371/journal.pone.0028297. {{cite journal}}: Invalid |ref=harv (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)CS1 maint: unflagged free DOI (link)
• Harlin-Cognato, April D; Honeycutt, Rodney L (2006). "Multi-locus phylogeny of dolphins in the subfamily Lissodelphininae: character synergy improves phylogenetic resolution". BMC Evol Biol. 6 (87). doi:10.1186/1471-2148-6-87. PMC 1635737. {{cite journal}}: Invalid |ref=harv (help)CS1 maint: unflagged free DOI (link)

A classification of the family Delphinidae from Perrin (1989) reflecting a traditional view of species interrelationships.

Revised classification of the family Delphinidae based on molecular systematic analysis; adapted from LeDuc et al. (1999).

Family Delphinidae Subfamily Steninae Steno bredanensis Sousa chinensis S. teuszii Sotalia fluviatilis Subfamily Delphininae Lagenorhynchus albirostris L. acutus L. obscurus L. obliquidens L. cruciger L. australis Grampus griseus Tursiops truncatus Stenella frontalis S. attenuata S. longirostris S. clymene S. coeruleoalba Delphinus delphis Lagenodelphis hosei Subfamily Lissodelphinae Lissodelphis borealis L. peronii Subfamily Cephalorhynchinae Cephalorhynchus commersonii C. eutropia C. heavisidii C. hectori Subfamily Globicephalinae Peponocephala electra Feresa attenuata Pseudorca crassidens Orcinus orca Globicephala melas G. macrorhynchus Subfamily Orcaellinae Orcaella brevirostris

Family Delphinidae Subfamily Stenoninae Steno bredanensis Sotalia fluviatilis Subfamily Delphininae Sousa chinensis Stenella clymene S. coeruleoalba S. frontalis S. attenuata S. longirostris Delphinus delphis D. capensis Tursiops truncatus T. aduncus Lagenodelphis hosei Subfamily Lissodelphininae Lissodelphis borealis L. peronii Cephalorhynchus heavisidii C. hectori C. eutropia C. commersonii Sagmatias obscurus S. obliquidens S. cruciger S. australis Subfamily Globicephalinae Feresa attenuata Peponocephala electra Globicephala melas G. macrorhynchus Pseudorca crassidens Grampus griseus Subfamily Orcininae Orcinus orca Orcaella brevirostris Incertae sedis Lagenorhynchus albirostris Leucopleurus acutus

Yeah, the current state of delphinid phylogeny is a bit of a mess. It's one of those instances where the radiation of the group occurred so quickly that it's very difficult to put any kind of pattern on it. I do know that at least some of LeDuc's 1999 work has been challenged since (see here, for example), but I'm not sure how big of a change it makes to the above - a lot of it seems to be in the finer detail. Anaxial (talk) 09:02, 20 January 2013 (UTC)

Oops, I missed your comment. And yes, I completely agree this is messy. Would you agree that the two lists above are better than the present list? --Fama Clamosa (talk) 10:55, 20 January 2013 (UTC)

Yes, it looks so. While I suspect there is more upheaval to come, it may not be at the subfamily level, and, anyway, we can hardly include it if it hasn't happened yet! It would appear, from what I can tell, that people are still using LeDuc's paper as a starting point, even if they don't agree with it in every respect. Just remember not to italicise the subfamilies :) Anaxial (talk) 18:07, 20 January 2013 (UTC)

Another good paper to look at would be

• McGowen, M. R. (2011). "Toward the resolution of an explosive radiation—A multilocus phylogeny of oceanic dolphins (Delphinidae)". Molecular Phylogenetics and Evolution. 60 (3): 345–357. doi:10.1016/j.ympev.2011.05.003. PMID 21600295.

His phylogeny seems to agree with the classification in LeDuc et al. (1999), except that Orcininae and Stenoninae are not monophyletic in the nuclear data. It seems that the remaining three subfamilies are well supported, but the relationships within these clades are still quite unclear. Ucucha (talk) 12:47, 20 January 2013 (UTC)

Thanks for the feedback. IRL is keeping me busy, but I feel LeDuc 1999 will do, with some additions and restrictions. I'll return to this... ---Fama Clamosa (talk) 23:58, 20 January 2013 (UTC)

Check that out: http://www.biomedcentral.com/1471-2148/11/65/ — Preceding unsigned comment added by Draco ignoramus sophomoricus (talk • contribs) 01:39, 30 March 2013 (UTC)

Thanks. But I had an overdose of genetics already. Figure 4 in Spaulding, Michelle; O'Leary, Maureen A.; Gatesy, John. "Relationships of Cetacea (Artiodactyla) Among Mammals: Increased Taxon Sampling Alters Interpretations of Key Fossils and Character Evolution". PLOS ONE (9): e7062. {{cite journal}}: Text "volume 4" ignored (help) is black magic in my world. I will start all over with a copy of "Genetics for Dummies". --Fama Clamosa (talk) 06:46, 30 March 2013 (UTC)

So, to sum it up; Delphininae (with a core of Delphinus, Stenella, Tursiops, Lagenodelphis and Sousa) and Globicephalinae (with a core of Globicephala, Peponocephala, Feresa, Pseudorca and Grampus) are valid taxons and sister clades while Cephalorynchus, Lagenorynchus and Lissodelphis form a polytomy at the base of the family, right? Also Steno is contested between Globicephalinae and Delphininae, Orcinus is either sister taxon to both of them or basal within Globicephalinae and Sotalia and Orcaella are readily placed within Delphininae and Globicephalinae respectively.--Draco ignoramus sophomoricus (talk) 22:37, 14 April 2013 (UTC)

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Sexual dimorphism contradiction?

Both quotes are present in the article.. (?)

"Several species exhibit sexual dimorphism; the males are larger than females."

"Several species exhibit sexual dimorphism, with the females being larger than the males." Romantical (talk) 12:36, 14 May 2023 (UTC)

@Romantical: Probably just an error born of fast typing when the article was expanded back in 2015 by Dunkleosteus77. Since the source states that Cephalorhynchus along with some other individual species exhibit sexual dimorphism; with males are larger than females, I'll adjust the text accordingly, thanks for noting this. 74.73.224.126 (talk) 13:19, 14 May 2023 (UTC)

Extinct taxon

Would it be useful to add extinct taxon to the article? There are some genera that have wikipedia articles (Australodelphis, for example), so it makes sense to mention them under taxonomy. Kitch (talk) 01:39, 25 March 2024 (UTC)