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Synechodus rhaeticus

Chondrichthyes - Synechodontiformes - Paleospinacidae

Taxonomy
Palaeospinax rhaeticus was named by Duffin (1982). Its type specimen is OS 2'1978, a dermal scale (fin spine), and it is a 3D body fossil. Its type locality is Aust Cliff bone bed (Leicester Museum), which is in a Rhaetian coastal conglomerate in the Westbury Formation of the United Kingdom.

It was recombined as Synechodus rhaeticus by Duffin (1998), Cuny et al. (2000) and Cuny and Risnes (2005).

Synonymy list
YearName and author
1982Palaeospinax rhaeticus Duffin pp. 2-3 figs. 1-2
1998Synechodus rhaeticus Duffin p. 250 figs. 3a-h
2000Synechodus rhaeticus Cuny et al. p. 173 figs. 5D-E, 6D-G
2005Synechodus rhaeticus Cuny and Risnes p. 13 figs. 2e-f

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
classChondrichthyes
RankNameAuthor
subclassElasmobranchiiBonaparte 1838
infraclassEuselachii()
NeoselachiiCompagno 1977
superorderSqualomorphii(Compagno 1973)
orderSynechodontiformes
familyPaleospinacidae(Regan 1906)
genusSynechodusWoodward 1888
speciesrhaeticus()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
C. J. Duffin 1982A palaeospinacid shark known only by large (over 70mm long) dorsal fin spines. The anterior and lateral faces of the spine are enamelled. The enamel shows growth rings. The enamel coat has a long (over 5mm) proximal extension anteriorly and sweeps back quickly and smoothly to the posterior spine margin. Enamel tubercles may be present in a double row proximal to the lower border of the enamel.