Sclerorhynchoidei
| Sclerorhynchoidei Temporal range: Barremian-Maastrichtian
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| Comparison between a longnose sawshark (top and left), Sclerorhynchus (middle), and a largetooth sawfish (bottom and right) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Superorder: | Batoidea |
| Order: | Rajiformes |
| Suborder: | †Sclerorhynchoidei Cappetta, 1980[1] |
| Families | |
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| Synonyms | |
Sclerorhynchoidei is an extinct suborder of rajiform rays that had long rostra with large denticles similar to sawfishes and sawsharks. This feature was convergently evolved and their closest living relatives are actually skates.[7][8][9] While they are often called "sawfishes", sawskates is a more accurate common name for sclerorhynchoids. The suborder contains five named families: Ganopristidae, Ischyrhizidae, Onchopristidae, Ptychotrygonidae, and Schizorhizidae.[10] Several genera (see below) are not currently placed in any of these families. Sclerorhynchoids first appeared in the Barremian and went extinct during the Cretaceous–Paleogene extinction event, with former Paleocene occurrences being misidentifications or reworked specimens.[11][12] One female specimen of Libanopristis with nine embryos preserved in situ represents one of the first fossil evidence of batoid ovoviviparity.[13]
Phylogeny
Below is a cladogram of Sclerorhynchoidei, with the topology based on Villalobos-Segura et al. (2021b) and the family taxonomy based on Greenfield (2021).[9][10]
| Rajiformes |
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Other genera
- †Agaleorhynchus
- †Ankistrorhynchus
- †Atlanticopristis
- †Australopristis
- †Baharipristis
- †Biropristis
- †Borodinopristis
- †Celtipristis
- †Columbusia
- †Ctenopristis
- †Dalpiazia
- †Iberotrygon
- †Kiestus
- †Marckgrafia
- †Onchosaurus
- †Plicatopristis
- †Pucapristis
- †Renpetia
- †Sao Khua sclerorhynchoid
References
- ^ Cappetta, H. (1980). "Les Sélaciens du Crétacé supérieur du Liban. II. Batoïdes". Palaeontographica, Abteilung A. 168 (5–6): 149–229.
- ^ Case, G.R. (1978). "A new selachian fauna from the Judith River Formation (Campanian) of Montana". Palaeontographica, Abteilung A. 160 (1–6): 176–205.
- ISBN 3-89937-053-8.
- ^ Herman, J.; Van Waes, H. (2012a). "Observations diverses et déductions concernant l'evolution et la systématique de quelques Euselachii, Neoselachii et Batoidei (Pisces - Elasmobranchii), actuels et fossiles" (PDF). Géominpal Belgica. 2 (1): 1–89. Archived from the original (PDF) on 2015-02-17.
- ^ Herman, J.; Van Waes, H. (2012b). "Observations diverses et déductions concernant l'evolution et la systématique de quelques Euselachii, Neoselachii et Batoidei (Pisces - Elasmobranchii), actuels et fossiles. Données complémentaires" (PDF). Géominpal Belgica. 2 (2): 1–12. Archived from the original (PDF) on 2015-02-17.
- ^ Herman, J.; Van Waes, H. (2014). "Observations concerning the evolution and the parasystematics of all the living and fossil Chlamydoselachiformes, Squatiniformes, Orectolobiformes, and Pristiophoriformes, based on both biological and odontological data. Suggestion of a possible origin of the order Pristiophoriformes, of the order Ganopristiformes and a global synthesis of the previous systematics proposals" (PDF). Géominpal Belgica. 6 (1): 1–347. Archived from the original (PDF) on 2015-02-17.
- S2CID 145940997.
- S2CID 210302939.
- ^ ISSN 0024-4082.
- ^ S2CID 239067365.
- ^ Kriwet, J.; Kussius, K. (2001). "Paleobiology and paleobiogeography of sclerorhynchid sawfishes (Chondrichthyes, Batomorphii)". Revista Española de Paleontología. 16 (3): 35–46.
- ISBN 978-3-89937-148-2.
- ISSN 0365-1576.