''Rhinconichthys'' is an extinct genus of

bony fish Osteichthyes ( ; ), also known as osteichthyans or commonly referred to as the bony fish, is a Biodiversity, diverse clade of vertebrate animals that have endoskeletons primarily composed of bone tissue. They can be contrasted with the Chondricht ...

which existed during the

Cenomanian The Cenomanian is, in the International Commission on Stratigraphy's (ICS) geological timescale, the oldest or earliest age (geology), age of the Late Cretaceous epoch (geology), Epoch or the lowest stage (stratigraphy), stage of the Upper Cretace ...

stage of the

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''cre ...

. Along with its close cousins the great-white-shark-sized or larger '' Bonnerichthys'' and the immense ''

Leedsichthys ''Leedsichthys'' is an extinct genus of pachycormid fish that lived in the oceans of the Middle to Late Jurassic.Liston, JJ (2004). An overview of the pachycormiform ''Leedsichthys''. In: Arratia G and Tintori A (eds) Mesozoic Fishes 3 - Systema ...

'', ''Rhinconichthys'' forms a line of giant filter-feeding bony

pachycormid Pachycormiformes is an extinct order of marine Actinopterygii, ray-finned fish known from the Early Jurassic to the end of the Cretaceous. It only includes a single family, Pachycormidae. They were characterized by having serrated pectoral fins ( ...

fish that swam the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya. ...

and Cretaceous seas for over 100 million years.

Description

''Rhinconichthys'' was a medium-sized fish. ''R. uyenoi'' grew to around long, while ''R. purgatoirensis'' was much smaller, around long.

References

Pachycormiformes Fossil taxa described in 2010 Cretaceous fish of Europe Cretaceous fish of Asia {{Cretaceous-fish-stub