Nectocotis

Nectocotis rusmithi is a genus of Ordovician animal with uncertain affinity, found in the Whetstone Gulf Formation, New York State. It was originally described as a nectocaridid, differing from Nectocaris in the possession of an internal skeletal element, and this character was taken as evidence that this group is a stem group cephalopod.^[2] However, study in 2025, which considered nectocaridids as a stem chaetognath, did not include this taxon to nectocarididae due to lack of diagnostic features.^[3]

Nectocotis Temporal range: Katian PreꞒ Ꞓ O S D C P T J K Pg N
Type specimen (from Smith, 2019[1])
Scientific classification
Kingdom:	Animalia
Family:	†Nectocarididae (?)
Genus:	†Nectocotis Smith, 2020
Species:	†N. rusmithi
Binomial name
†Nectocotis rusmithi Smith, 2020