Protacrodontidae, Cappetta, Duffin and Zidek, 1993

Roelofs, Brett, Barham, Milo, Mory, Arthur J. & Trinajstic, Kate, 2016, Late Devonian and Early Carboniferous chondrichthyans from the Fairfield Group, Canning Basin, Western Australia, Palaeontologia Electronica (Barking, Essex: 1987) 262, pp. 1-28 : 17-18

publication ID

https://doi.org/ 10.26879/583

persistent identifier

https://treatment.plazi.org/id/ED189025-607C-FF93-FC4F-FA916DEF9635

treatment provided by

Felipe

scientific name

Protacrodontidae
status

 

Protacrodontidae gen. et sp. indet.

Figure 7.1-2 View FIGURE 7

Material. A partial tooth from sample OH-4, Gumhole Formation, Oscar Hill, Famennian.

Description. The preserved part of the crown comprises a large triangular cusp and four smaller lateral cusps ( Figure 7.1-2 View FIGURE 7 ) all ornamented with strong linear cristae. The first and second lateral cusps are almost equal in size with the third and fourth cusps diminishing in size distally. On the lingual side of the crown a row of four small rounded cusplets occur between the central and second lateral cusp ( Figure 7.1 View FIGURE 7 ). There is a row of larger, more irregularly shaped cusplets on the entire preserved labial side of the crown ( Figure 7.2 View FIGURE 7 ). A distinct crown-base interface is lacking on the labial side of the tooth. The base is mesio-distally shorter than the crown but extends lingually and is perforated by small pores.

Order HYBODONTIFORMES Cappetta, Duffin and Zidek, 1993

Superfamily HYBODONTOIDEA Owen, 1846

Family LONCHIDIIDAE Herman, 1977

Genus LISSODUS Brough, 1935

Type Species. Lissodus africanus Broom, 1909

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