Acrodus

Acrodus (from Greek: άκρος ákros, 'high' and Greek: ὀδούς odoús 'tooth')^[2] is an extinct genus of hybodont spanning from the Early Triassic^[3] to the Late Jurassic.^[4] (The Early Cretaceous species "Acrodus" nitidus affinity to the genus is questionable.^[5]) It was durophagous, with blunt, broad teeth designed for crushing and grinding.^[6] Some Middle Triassic species have been suggested to have grown to lengths of 1.8–2.5 metres (5.9–8.2 ft).^[7] Species are known from both marine and freshwater environments, with all Middle and Late Jurassic species only known from freshwater.^[4]

Acrodus Temporal range: Early Triassic–Late Jurassic PreꞒ Ꞓ O S D C P T J K Pg N
Partial articulated dentition
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	†Hybodontiformes
Family:	†Acrodontidae
Genus:	†Acrodus Agassiz in Alberti, 1834[1]

Species

• Acrodus acuminatus
• Acrodus acutus
• Acrodus alexandrae
• Acrodus alpinus
• Acrodus anningiae
• Acrodus angustus
• Acrodus braunii
• Acrodus (Acronemus) bicarenatus
• Acrodus cuneocostatus
• Acrodus dolloi
• Acrodus falsus
• Acrodus flemingianus
• Acrodus gaillardoti
• Acrodus illingworthi
• Acrodus immarginatus
• Acrodus jaeckeli
• Acrodus kalasinensis
• Acrodus keuperinus
• Acrodus laevigatus
• Acrodus (Acrodonchus) lateralis
• Acrodus levis
• Acrodus microdus
• Acrodus (Acrodonchus) minimus
• Acrodus nitidus
• Acrodus nobilis
• Acrodus olsoni
• Acrodus oppenheimeri
• Acrodus orbicularis
• Acrodus oreodontus
• Acrodus pulvinatus
• Acrodus rugosus
• Acrodus salomoni
• Acrodus scaber
• Acrodus simplex
• Acrodus spitzbergensis
• Acrodus striatus
• Acrodus substriatus
• Acrodus sweetlacruzensis
• Acrodus undulatus
• Acrodus vermicularis
• Acrodus vermiformis
• Acrodus virgatus
• Acrodus wempliae

References

1. Friedrich von Alberti (1834): Beitrag zu einer Monographie des Bunten Sandsteins, Muschelkalks und Keupers und die Verbindung dieser Gebilde zu einer Formation. Cotta, Stuttgart and Tübingen 1834, p. 90
2. Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 2. Retrieved 29 December 2021.
3. Romano, Carlo; Argyriou, Thodoris; Krumenacker, L.J. (June 2019). "Chondrichthyan teeth from the Early Triassic Paris Biota (Bear Lake County, Idaho, USA)". Geobios. 54: 63–70. doi:10.1016/j.geobios.2019.04.001.
4. Cuny, Gilles; Liard, Romain; Deesri, Uthumporn; Liard, Tida; Khamha, Suchada; Suteethorn, Varavudh (September 2014). "Shark faunas from the Late Jurassic—Early Cretaceous of northeastern Thailand". Paläontologische Zeitschrift. 88 (3): 309–328. doi:10.1007/s12542-013-0206-0. ISSN 0031-0220.
5. Cupello, Camila D.; Bermúdez-Rochas, David D.; Martill, David M.; Brito, Paulo M. (January 2012). "The Hybodontiformes (Chondrichthyes: Elasmobranchii) from the Missão Velha Formation (?Lower Cretaceous) of the Araripe Basin, North-East Brazil". Comptes Rendus Palevol. 11 (1): 41–47. doi:10.1016/j.crpv.2011.09.005.
6. Lukeneder, Alexander; Lukeneder, Petra (2021-08-17). "The Upper Triassic Polzberg palaeobiota from a marine Konservat-Lagerstätte deposited during the Carnian Pluvial Episode in Austria". Scientific Reports. 11 (1): 16644. Bibcode:2021NatSR..1116644L. doi:10.1038/s41598-021-96052-w. ISSN 2045-2322. PMC 8370992. PMID 34404880.
7. Niedźwiedzki, Robert; Surmik, Dawid; Chećko, Agnieszka; Salamon, Mariusz A (2021-04-28). "A regurgitalite of the Middle Triassic (Muschelkalk) from Upper Silesia (Poland)". Geology, Geophysics and Environment. 47 (1): 33–40. doi:10.7494/geol.2021.47.1.33. ISSN 2353-0790.