Istieus

Istieus Temporal range:

Specimen of I. grandis, Museum Koenig Bonn
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Division:	Teleostei
Order:	Albuliformes
Family:	Albulidae
Subfamily:	Pterothrissinae
Genus:	†Istieus Agassiz, 1844
Species
See text

Istieus is an extinct genus of prehistoric marine bonefish which lived during the Late Cretaceous from the Santonian to the Campanian.^[1]^[2]

The following species are known:^[3]^[4]^[5]

I. grandis Agassiz, 1844 (type species) - Campanian of Germany (Ahlen Formation)
I. lebanonensis Davis, 1887 - Santonian of Lebanon (Sahel Alma)
I. macrocephalus Agassiz, 1844 - Campanian of Germany (Ahlen Formation)

Illustration of I. grandis specimen

It is a member of the subfamily Pterothrissinae, making it related to the modern long-fin bonefish and Japanese gissu.^[2]

See also

References

1 2 Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on 2011-07-23. Retrieved 2009-02-27.
1 2 L-Recinos, Marleni; Cantalice, Kleyton M.; Caballero-Viñas, Carmen; Alvarado-Ortega, Jesús (2023-01-01). "A new Mesozoic teleost of the subfamily Albulinae (Albuliformes: Albulidae) highlights the proto-Gulf of Mexico in the early diversification of extant bonefishes". Journal of Systematic Palaeontology. 21 (1) 2223797. Bibcode:2023JSPal..2123797L. doi:10.1080/14772019.2023.2223797. ISSN 1477-2019.
↑ Geology, British Museum (Natural History) Department of; Woodward, Arthur Smith (1901). Catalogue of the Fossil Fishes in the British Museum (Natural History): Actinopterygian Teleostomi of the suborders Isospondyli (in part), Ostariophysi, Apodes, Percesoces, Hemibranchii, Acanthopterygii, and Anacanthini. order of the Trustees.
↑ "PBDB Taxon". paleobiodb.org. Retrieved 2026-08-10.
↑ Forey, Peter L (1973-12-21). "A revision of the Elopiform Fishes, fossil and recent". Bulletin of the British Museum (Natural History). Geology. Supplement. 10: 1–222. doi:10.5962/p.310418. ISSN 0524-644X. Archived from the original on 2025-10-07.

Elopomorph genera

Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Subclass: Neopterygii
Infraclass: Teleostei

- see Actinopterygii

- see Neopterygii

see Teleostei
Elopomorpha	see below↓

Elopomorpha

†Anaethalion †Aulothrissus †Daitingichthys †Davichthys †Echinelops †Eichstaettia †Elopsomolos †Eoprotelops †Epaelops †Flindersichthys †Ichthyemidion †Leptoelops †Naiathaelon †Protelops
†Phyllodontidae?	Egertonia Eodiaphyodus Paralbula Phyllodus Pseudoegertonia
Elopidae	†Ctenodentelops Elops †Kipalelops †Lyrolepis †Protoelops
Megalopidae	†Arratiaelops †Brouweria †Elopoides †Ikawaihere Megalops †Paratarpon †Promegalops †Protarpon †Sedenhorstia

†Baugeichthys †Brannerion †Bullichthys †Euroka †Farinichthys †Holcolepis †Lebonichthys †Marathonichthys †Osmeroides †Palealbula †Paraelops †Protalbula †Stewartichthys
Albulidae	Albula †Casierius †Deltaichthys †Elopothrissus †Hajulia †Istieus †Italoalbula Nemoossis †Nunaneichthys †Phosphonatator †Pteralbula Pterothrissus

Notacanthiformes

Notacanthidae	Lipogenys Notacanthus Polyacanthonotus
Halosauridae	Aldrovandia †Echidnocephalus Halosauropsis Halosaurus †Laytonia

- see Eels

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