Nectocaris is a genus of squid-like animal of controversial affinities known from the Cambrian period. The initial fossils were described from the Burgess Shale of Canada. Other similar remains possibly referrable to the genus are known from the Emu Bay Shale of Australia and Chengjiang Biota of China.
Nectocaris
Nectocaris pteryx from the Burgess Shale; funnel is visible folded to left of specimen. Image from Smith (2013).
Life restoration
Original (and obsolete) reconstruction based on a single, incompletely preserved, lateral specimen. The author of this reconstruction, based on the material then available, considered Nectocaris to bear arthropod and chordate-like features.
The Emu Bay Shale is a geological formation in Emu Bay, South Australia, containing a major Konservat-Lagerstätte. It is one of two in the world containing Redlichiidan trilobites. The Emu Bay Shale is dated as Cambrian Series 2, Stage 4, correlated with the upper Botomian Stage of the Lower Cambrian.
North Coast of Kangaroo Island, Emu Bay
Kangacaris (left) and Emucaris (right)
Image: Tuzoia life restoration
Image: Emuella Polymera