Palea steindachneri (Siebenrock 1906:579)

Holotype: NMW 20373 (Tiedemann & Häupl 1980:8; Tiedemann et al. 1994:12; illustrated in the original description, p. 579); paratypes (2), NMW 23480:1–2 (Tiedemann & Häupl 1980:8; Tiedemann et al. 1994:13).

Aspidonectes californiana Rivers 1889: 233

Holotype: UCMZ according to the original description, but now apparently lost (Webb 1975b:771; Webb 1978:47–48; Rodríguez-Robles et al. 2003:66).