Original Diagnosis of the genus Pterocera (Phyllocheilus) by Gabb, 1868, p. 140:
- "General form as in Pterocera; outer lip with no digitations, or small ones only; inner lip expanded as a thin plate over the front of the body whorl, and sometimes projecting beyond it laterally; both outer and inner lip deeply notched anteriorly near the canal."
Types: "Pter. speciosa, d'Orb., P. Dupiniana, d'Orb., P. marginata, d'Orb."
Phyllocheilus species are:
- Phyllocheilus bentleyi (Morris & Lycett, 1851)
- Phyllocheilus dupinianus (d'Orbigny, 1843)
- Phyllocheilus haueri (Zekeli, 1852)
- Phyllocheilus pictaviensis (d'Orbigny, 1850)
- Phyllocheilus polypoda (Buvignier, 1852)
- Phyllocheilus polycerus (d'Orbigny, 1843)
- Phyllocheilus ponti (Brongniart, 1821)
- Phyllocheilus rupellensis (d'Orbigny, 1850)
- Phyllocheilus schlumbergeri Cossmann, 1904
- Phyllocheilus speciosus (d'Orbigny, 1843)
- Phyllocheilus stella (d'Orbigny, 1850)
- Phyllocheilus verneuili Cossmann
- Phyllocheilus vespertilio (Eudes-Deslongchamps, 1843)
- The species listed here under Phyllocheilus do not fit into Gabb's diagnosis. This needs further investigation!
History and Synonymy
Malaptera Piette, 1876
Description of Malaptera by Hudleston, 1888, p. 101
- "Shell thin, fusiform or ovoid, wing very large, multidigitate, palmate, investing, bent back, extended on the columellar side, and sometimes on the posterior portion of the spire; anterior canal placed upon an expansion which forms part of the wing, and consisting of a wide furrow bent backwards as in Aporrhais. — Fischer."
Comment by Hudleston, 1888, p. 101
- "Such a genus as this possesses more resemblance to the existing Aporrhais than the average Jurassic Alaria does. Indeed, Cossmann ('Étage Bathonien,' p. 71) regards Malaptera as merely a subgenus of Aporrhais. Most of these shells were formerly referred to Pterocera, Lamarck."