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Lagenorhynchus albirostris (white-beaked dolphin)
Taxonomy
Delphinus albirostris was named by Gray (1846) [The type locality of Delphinus albirostris = Delphinus tursio Fabricius is 86894.]. It is extant. Its type specimen is BMNH 916a-48.7.12.12, a skeleton. It is the type species of Lagenorhynchus.
It was recombined as Lagenorhynchus albirostris by Gray (1846), Gray (1846), Gray (1850), Gray (1864), Gray (1866), Gray (1868), Gray (1871), Scott (1873), Trouessart (1904), Turner (1912), Fraser and Purves (1960), Scheffer and Rice (1963), Hershkovitz (1966), Rice (1998), Mead and Brownell (2005), Uhen et al. (2008), Perrin et al. (2013), Vollmer et al. (2019), Jefferson (2021).
It was recombined as Lagenorhynchus albirostris by Gray (1846), Gray (1846), Gray (1850), Gray (1864), Gray (1866), Gray (1868), Gray (1871), Scott (1873), Trouessart (1904), Turner (1912), Fraser and Purves (1960), Scheffer and Rice (1963), Hershkovitz (1966), Rice (1998), Mead and Brownell (2005), Uhen et al. (2008), Perrin et al. (2013), Vollmer et al. (2019), Jefferson (2021).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1846 | Delphinus tursio Brightwell p. 21 figs. Plate 1 |
| 1846 | Delphinus ibseni Eschricht |
| 1846 | Lagenorhynchus albirostris Gray p. 30 |
| 1846 | Delphinus pseudotursio Reichenbach |
| 1847 | Delphinus ibsenii Nilsson p. 600 |
| 1850 | Lagenorhynchus albirostris Gray p. 99 |
| 1864 | Lagenorhynchus albirostris Gray p. 238 |
| 1866 | Lagenorhynchus albirostris Gray p. 272 |
| 1868 | Lagenorhynchus albirostris Gray p. 8 |
| 1871 | Lagenorhynchus albirostris Gray p. 79 |
| 1873 | Lagenorhynchus albirostris Scott p. 83 |
| 1904 | Lagenorhynchus albirostris Trouessart p. 767 |
| 1912 | Lagenorhynchus albirostris Turner p. 125 |
| 1960 | Lagenorhynchus albirostris Fraser and Purves p. 112 figs. Figure 26 |
| 1963 | Lagenorhynchus albirostris Scheffer and Rice p. 6 |
| 1966 | Lagenorhynchus albirostris Hershkovitz p. 62 |
| 1998 | Lagenorhynchus albirostris Rice p. 113 |
| 2005 | Lagenorhynchus albirostris Mead and Brownell p. 729 |
| 2008 | Lagenorhynchus albirostris Uhen et al. p. 593 |
| 2013 | Lagenorhynchus albirostris Perrin et al. p. 571 figs. Table 1 |
| 2019 | Lagenorhynchus albirostris Vollmer et al. |
| 2021 | Lagenorhynchus albirostris Jefferson p. 45 |
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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.
Lagenorhynchus albirostris Gray 1846 [white-beaked dolphin]
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Invalid names: Delphinus ibsenii Eschricht 1846 [synonym], Delphinus pseudotursio Reichenbach 1846 [synonym], Delphinus tursio Brightwell 1846 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N. L. Vollmer et al. 2019 | Occurring across the North Atlantic, L. albirostris largely overlaps in distribution with L. acutus but can be differentiated based on its light gray or white beak, the presence of a grayish-white saddle behind the dorsal fin, the lack of a yellow/tan blaze along the flank, and a gradually tapering tail stock. Compared to L. acutus, L. albirostris has a shorter (<240 mm) and wider at the base rostrum (>125 mm) and fewer, but larger, teeth (see Meristics and osteology below for tooth count; Reeves et al. 1999a, Galatius and Kinze 2016). Additionally, L. albirostris can be distinguished from all Sagmatias and Leucopleurus species based on cranial characteristics, including having the largest condylobasal length, width of external nares, braincase length, and preorbital width, and by having a greater vertebral count (Miyazaki and Shikano 1997b).
Numerous molecular phylogenies, using nuclear and/or mitochon- drial markers, have shown that L. albirostris is differentiated from Leucopleurus acutus and all Sagmatias, Cephalorhynchus, and Lisso- delphis species with high statistical support based on phylogenetic bootstrap and Bayesian posterior probability (PP) values (Fig. 2, 3; Table 4). These studies reveal that L. albirostris has no close genetic affinity to any other species in these genera, supporting the monotypic status of this genus. |
Measurements
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| Source: f = family, subo = suborder, o = order | |||||
| References: Uhen 2004, Nowak 1991 | |||||
Age range: Holocene or 0.01170 to 0.00000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Holocene | United Kingdom (England) | Delphinus tursio (86894) | |
| Holocene | Greenland | Lagenorhynchus albirostris (168123) | |
| Holocene | Svalbard and Jan Mayen | Lagenorhynchus albirostris (168125) | |
| Holocene | Iceland | Lagenorhynchus albirostris (168124) | |
| Holocene | Denmark | Lagenorhynchus albirostris (159727 186598) |