Best Keyhole
The Mozu Tombs are a cluster of ancient burial mounds located in Sakai, Osaka Prefecture, Japan, dating back to the Kofun period. This necropolis contains numerous keyhole-shaped tombs, including the Daisen Kofun, which is one of the largest burial mounds in the world by surface area. These massive...
NGC 1999 is a bright reflection nebula located in the southern part of the Orion constellation, illuminated by the variable star V380 Orionis. It is situated roughly 1,500 light-years away from Earth and lies close to the Orion Nebula. Historically, the nebula was noted for a puzzling, dark, T-shape...
Mellita quinquiesperforata, commonly known as the five-hole sand dollar, is a flat irregular sea urchin belonging to the family Mellitidae. It is distinguished by the five characteristic, keyhole-like lunules that pierce its rigid skeleton, or test. This species is found along the sandy coastal wate...
Furuichi Tombs are a cluster of ancient Japanese burial mounds, known as kofun, located across the cities of Habikino and Fujiidera in Osaka Prefecture. Dating from the late 4th to the 6th century AD, the site features massive keyhole-shaped tumuli constructed for the ruling elite of the period. Tog...
Encope emarginata is a species of sea urchin belonging to the family Mellitidae, recognized by its distinctive notched edges and flattened, disk-like test.
Mellita longifissa is a species of sand dollar in the family Mellitidae, notable for its extremely long posterior lunule and Eastern Pacific coastal range.
Encope grandis is a species of sand dollar in the family Mellitidae commonly found inhabiting the shallow marine environments along the Eastern Pacific coast.
Caribbean keyhole limpet recognized by its strongly nodular shell surface and an elongated apical aperture resembling a keyhole, found on shallow reefs.
Predatory keyhole limpet of the Pacific coast from Alaska to Baja California; the apical hole in its shell vents exhalant water from the mantle cavity.
