Lagenorhynchus albirostris
Lagenorhynchus acutus
Lagenorhynchus obliquidens
Lagenorhynchus obscurus
Lagenorhynchus australis
Lagenorhynchus cruciger Lagenorhynchus is a genus in the order cetacea containing six closely related species. These are

• the White-beaked Dolphin, Lagenorhynchus albirostris
• the Atlantic White-sided Dolphin, Lagenorhynchus acutus
• the Pacific White-sided Dolphin, Lagenorhynchus obliquidens
• the Dusky Dolphin, Lagenorhynchus obscurus
• the Black-chinned Dolphin, Lagenorhynchus australis
• the Hourglass Dolphin, Lagenorhynchus cruciger

The name Lagenorhynchus derives from the Greek lagenos meaning bottle and rhynchus meaning beak. Indeed the "bottle-nose" is a characteristic of this genus. However the dolphins that have attained the common name Bottlenose Dolphin belong in the genus Tursiops.

See the individual species articles for further details.