Sweet (1988) named both Protopanderodontida and Panderodontida as new conodont orders, identifying the former as ancestral to the latter. The main difference between the two orders is that the elements of panderodontids have deep furrows on their sides, while those of protopanderodontids bear shallow striations. Panderodontida could be reconsidered a suborder or superfamily within Protopanderodontida, though others note that this would not solve the issue of paraphyly, since Protopanderodontida is probably also ancestral to Prioniodontida. •
Clavohamulidae Lindström, 1970 •
Drepanoistodontidae Fåhraeus & Nowlan, 1978 [Distacodontidae Bassler, 1925] •
Protopanderodontidae Lindström, 1970 [Scolopodontidae Bergström, 1981; Oneotodontidae Miller, 1980; Teridontidae Miller, 1981] •
Serratognathidae Zhen et al., 2009 •
Strachanognathidae? Bergström, 1981 [Cornuodontidae Stouge, 1984] •
Incertae sedis •
Besselodus? Aldridge, 1982 •
Dapsilodus? Cooper, 1976 == References ==