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Lagenorhynchus acutus
Taxonomy
Delphinus (Grampus) acutus was named by Gray (1828) [Type locality unknown (Hershkovitz, 1866).]. It is extant. Its type specimen is Leiden Zoological Musuem?, a skull.
It was recombined as Electra acutua by Gray (1871); it was recombined as Leucopleurus acutus by LeDuc et al. (1999), Geisler et al. (2011), Perrin et al. (2013), Vollmer et al. (2019); it was recombined as Lagenorhynchus acutus by Gray (1846), Gray (1850), Gray (1864), Gray (1866), Gray (1866), Scott (1873), Trouessart (1904), Turner (1912), Fraser and Purves (1960), Scheffer and Rice (1963), Hershkovitz (1966), Rice (1998), Mead and Brownell (2005), Jefferson (2021).
It was recombined as Electra acutua by Gray (1871); it was recombined as Leucopleurus acutus by LeDuc et al. (1999), Geisler et al. (2011), Perrin et al. (2013), Vollmer et al. (2019); it was recombined as Lagenorhynchus acutus by Gray (1846), Gray (1850), Gray (1864), Gray (1866), Gray (1866), Scott (1873), Trouessart (1904), Turner (1912), Fraser and Purves (1960), Scheffer and Rice (1963), Hershkovitz (1966), Rice (1998), Mead and Brownell (2005), Jefferson (2021).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1828 | Delphinus (Grampus) acutus Gray |
| 1841 | Delphinus eschrichtii Schlegel |
| 1843 | Delphinus leucopleurus Rasch |
| 1846 | Lagenorhynchus leucopleurus Gray p. 34 |
| 1846 | Lagenorhynchus acutus Gray p. 36 |
| 1847 | Delphinus leucopleurus Nilsson p. 598 |
| 1850 | Lagenorhynchus leucopleurus Gray p. 97 |
| 1850 | Lagenorhynchus acutus Gray p. 101 |
| 1864 | Lagenorhynchus leucopleurus Gray p. 238 |
| 1864 | Lagenorhynchus acutus Gray p. 239 |
| 1866 | Lagenorhynchus acutus Gray p. 216 |
| 1866 | Lagenorhynchus leucopleurus Gray p. 216 |
| 1866 | Lagenorhynchus acutus Gray p. 270 |
| 1866 | Lagenorhynchus leucopleurus Gray p. 273 |
| 1868 | Leucopleurus arcticus Gray p. 7 |
| 1871 | Electra acutua Gray p. 76 |
| 1871 | Leucopleurus arcticus Gray p. 78 |
| 1873 | Lagenorhynchus acutus Scott p. 84 |
| 1873 | Lagenorhynchus leucopleurus Scott p. 85 |
| 1876 | Lagenorhynchus gubernator Cope |
| 1876 | Lagenorhynchus perspicillatus Cope |
| 1904 | Lagenorhynchus acutus Trouessart p. 767 |
| 1912 | Lagenorhynchus acutus Turner p. 128 |
| 1960 | Lagenorhynchus acutus Fraser and Purves p. 112 figs. Figure 26 |
| 1963 | Lagenorhynchus acutus Scheffer and Rice p. 6 |
| 1966 | Lagenorhynchus acutus Hershkovitz p. 60 |
| 1998 | Lagenorhynchus acutus Rice p. 113 |
| 1999 | Leucopleurus acutus LeDuc et al. p. 639 figs. Figure 2 |
| 2005 | Lagenorhynchus acutus Mead and Brownell p. 729 |
| 2011 | Leucopleurus acutus Geisler et al. p. 6 figs. Table 1 |
| 2013 | Leucopleurus acutus Perrin et al. p. 571 figs. Table 1 |
| 2019 | Leucopleurus acutus Vollmer et al. |
| 2021 | Lagenorhynchus acutus 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 acutus Gray 1828
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Invalid names: Delphinus eschrichtii Schlegel 1841 [synonym], Delphinus leucopleurus Rasch 1843 [synonym], Lagenorhynchus gubernator Cope 1876 [synonym], Lagenorhynchus perspicillatus Cope 1876 [synonym], Leucopleurus arcticus Gray 1868 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N. L. Vollmer et al. 2019 | Leucopleurus acutus partially overlaps in distribution with L. albirostris across the North Atlantic and can be differentiated based on the presence of a sharply defined color pattern, in part consisting of a dark gray to black upper jaw and entire dorsal surface, a white lateral patch starting below the dorsal fin and extending posteriorly, a white belly and lower jaw, black flippers, and a yellow or tan blaze along the flank. From a lat- eral view, the tail stock abruptly tapers prior to the flukes. Compared to L. albirostris, L. acutus has a longer and narrower skull (Reeves et al. 1999b). Additionally, L. acutus can be distinguished from all Sagmatias species based on having the largest lachrymal length and greatest preorbi- tal width (Miyazaki and Shikano 1997b).
Molecular evidence based on both nuclear and mitochondrial DNA data supports that L. acutus is differentiated from Lagenorhynchus albirostris and all species of Sagmatias, Cephalorhynchus, and Lissodel- phis with high statistical support based on phylogenetic bootstrap and PP values (Fig. 2, 3; Table 4). These studies reveal that L. acutus has no close genetic affinity to any other species, supporting the monotypic sta- tus of this genus. |
Measurements
No measurements are available
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| Source: f = family, subo = suborder, o = order | |||||
| References: Nowak 1991, Uhen 2004 | |||||