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Delphinus bairdii
Taxonomy
Delphinus bairdii was named by Dall (1873) [type specimens now lost according to Heyning & Perrin 1994]. It is extant.
It was synonymized subjectively with Delphinus delphis by Trouessart (1898), Jefferson (2021); it was recombined as Delphinus delphis bairdii by Hershkovitz (1966); it was synonymized subjectively with Delphinus capensis by Heyning and Perrin (1994), Mead and Brownell (2005).
It was synonymized subjectively with Delphinus delphis by Trouessart (1898), Jefferson (2021); it was recombined as Delphinus delphis bairdii by Hershkovitz (1966); it was synonymized subjectively with Delphinus capensis by Heyning and Perrin (1994), Mead and Brownell (2005).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1873 | Delphinus bairdii Dall p. 12 |
| 1966 | Delphinus delphis bairdii Hershkovitz p. 47 |
| 2024 | Delphinus bairdii Jefferson et al. p. 24 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Delphinus bairdii Dall 1873
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. A. Jefferson et al. 2024 | The eastern Pacific endemic Delphinus bairdii can be distinguished from the parapatric D. delphis by the following external characters: longer beak, greater body length, more slender body, and relatively smaller flippers and dorsal fin (Heyning & Perrin, 1994). Beak length can reach up to 175mm (Heyning & Perrin, 1994). Body length of adults ranges from 193-265cm (Heyning & Perrin, 1994; Gallo-Reynoso et al., 2014; Leander et al., 2021; Vidal & Gallo- Reynoso, 2012; this study). D. bairdii also has a longer and relatively narrower skull. Condylobasal length of adults ranges from 415-514mm (Heyning & Perrin, 1994; this study). Rostral length/zygomatic width ratios range from 1.50 to 1.83, and eastern Pacific specimens and ratios >1.476 can be considered to be D. bairdii (this study). Tooth counts are 47–62 per tooth row (this study). Color pattern components that are diagnostic include a more muted pattern overall, with a slightly darker thoracic patch. There is a wide stripe from the gape to the anus, which merges and blends with the flipper stripe. This creates a darkened face (especially in older animals), in which the eye and lip patches show less contrast with the rest of the face (Heyning & Perrin, 1994; this study). Light patches may occur on the flippers and dorsal fin, but generally only in larger animals (T.A.J., personal observation). Because there were shared control region and cytochrome b haplotypes between D. bairdii and D. delphis in this study, there were no fixed differences or fully diagnostic mtDNA sites. However, the Random Forest model based on the concatenated control region and cytochrome b sequences in this study can correctly classify over 99% of the D. bairdii specimens (249 out of 251). Fifteen sites were identified as being important to this classification, two of which were nearly fixed. |
Measurements
No measurements are available
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| Source: f = family, subo = suborder, o = order | |||||
| References: Uhen 2004, Nowak 1991 | |||||
Collections
No collection or age range data are available