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Extinct family of ray-finned fishes
Dapediidae is an extinct family of
neopterygian
ray-finned fish that lived from the
Middle Triassic to
Late Jurassic (
Ladinian to
Tithonian ).
[1] It is the only family of the order Dapediiformes . Its members were historically placed within the
ginglymodian family
Semionotidae , but were moved to their own family in 1966.
[2]
Description
Dapediids had deep, laterally flattened circular bodies covered in thick
ganoid scales , which gave them a resemblance to the
pycnodontiforms , a group they may or may not be related to.
[3] Their teeth were adapted towards a
durophagous diet; some dapediids fed on hard-shelled invertebrates,
[4] while at least one genus (
Hemicalypterus ) may have been herbivorous.
[5]
Classification
Dapediids are usually considered to be either basal ginglymodians
[2]
[5] or
stem group representatives of the wider clade
Holostei ,
[3]
[6] but some studies have found them to be early-diverging stem-
teleosts instead.
[3]
References
^ Cawley, John J.; Marramà, Giuseppe; Carnevale, Giorgio; Villafaña, Jaime A.; López‐Romero, Faviel A.; Kriwet, Jürgen (February 2021).
"Rise and fall of †Pycnodontiformes: Diversity, competition and extinction of a successful fish clade" . Ecology and Evolution . 11 (4): 1769–1796.
doi :
10.1002/ece3.7168 .
ISSN
2045-7758 .
PMC
7882952 .
PMID
33614003 .
^
a
b Thies, D.; Waschkewitz, J. (2016).
"Redescription of Dapedium pholidotum (Agassiz, 1832) (Actinopterygii, Neopterygii) from the Lower Jurassic Posidonia Shale, with comments on the phylogenetic position of Dapedium Leach, 1822" . Journal of Systematic Palaeontology . 14 (4): 339–364.
doi :
10.1080/14772019.2015.1043361 .
S2CID
130282395 .
^
a
b
c Latimer, A. E.; Giles, S. (2018).
"A giant dapediid from the Late Triassic of Switzerland and insights into neopterygian phylogeny" . Royal Society Open Science . 5 (8): 180497.
Bibcode :
2018RSOS....580497L .
doi :
10.1098/rsos.180497 .
PMC
6124034 .
PMID
30225040 .
^ Smithwick, F. M. (2015).
"Feeding ecology of the deep-bodied fish Dapedium (Actinopterygii, Neopterygii) from the Sinemurian of Dorset, England" . Palaeontology . 58 (2): 293–311.
Bibcode :
2015Palgy..58..293S .
doi :
10.1111/pala.12145 .
S2CID
86168055 .
^
a
b Gibson, S. Z. (2016).
"Redescription and Phylogenetic Placement of †Hemicalypterus weiri Schaeffer, 1967 (Actinopterygii, Neopterygii) from the Triassic Chinle Formation, Southwestern United States: New Insights into Morphology, Ecological Niche, and Phylogeny" . PLOS ONE . 11 (9): e0163657.
Bibcode :
2016PLoSO..1163657G .
doi :
10.1371/journal.pone.0163657 .
PMC
5033578 .
PMID
27657923 .
^ López-Arbarello, A.; Sferco, E. (2018).
"Neopterygian phylogeny: the merger assay" . Royal Society Open Science . 5 (3): 172337.
Bibcode :
2018RSOS....572337L .
doi :
10.1098/rsos.172337 .
PMC
5882744 .
PMID
29657820 .