Pterothecidae

Belongs within: Bellerophontoidea.

The Pterothecidae are an Ordovician to Devonian group of bellerophontoids with a rapidly expanding shell bearing a more or less developed plate at the aperture, and a selenizone on a dorsal crest (Knight et al. 1960).

PterothecidaeBR05
    |--Pedasiola Spriesterbach 1919 [Pedasiolinae]BR05
    |    `--*P. rhenana Spriestersbach 1919KC60
    |--PterothecinaeBR05
    |    |--Cyclotheca Teichert 1935 non Theiss. 1914 (ICBN)KC60
    |    |    `--*C. bohemica (Barrande 1867) [=Pterotheca bohemica]KC60
    |    |--Aspidotheca Teichert 1935KC60
    |    |    `--*A. schrieli Teichert 1935KC60
    |    `--Pterotheca Salter 1852BR05 [incl. Aulacomerella von Huene 1900F62, Clioderma Hall 1861F62]
    |         |  i. s.: *P. transversa (Portlock 1843) [=Atrypa transversa]F62
    |         |         ‘*Clioderma’ saffordi Hall 1861F62
    |         |--P. simplexW01
    |         `--+--P. consobrinaW01
    |            `--P. expansaW01
    `--Carinaropsinae [Carinaropsidae]BR05
         |--Phragmosphaera Knight 1945KC60
         |    `--*P. miranda Knight 1945KC60
         |--Gyrospira Boucot 1956KC60
         |    `--*G. tourteloti Boucot 1956KC60
         `--Sphenosphaera Knight 1945KC60
              |--S. burginensisW01
              `--+--S. troostiW01
                 `--+--+--*S. clausa (Ulrich in Ulrich & Scofield 1897)KC60, W01, KC60 [=Bellerophon claususKC60]
                    |  `--+--S. mohriW01
                    |     `--S. subangularisW01
                    `--Carinaropsis Hall 1847BR05 [=Carinariopsis Fischer 1885KC60; incl. Phragmostoma Hall 1861KC60]
                         |  i. s.: C. subcarinata (d’Orbigny 1850) (see below for synonymy)KC60
                         |--C. acutaW01
                         `--+--C. cunulaeW01
                            `--C. cymbulaW01

Carinaropsis subcarinata (d’Orbigny 1850) [=Cyrtolites subcarinatus, *Carinaropsis carinata Hall 1847, *Carinariopsis carinata, Cyrtolites carinatus non Sowerby 1839]^KC60

*Type species of generic name indicated

References

[BR05] Bouchet, P., & J.-P. Rocroi. 2005. Classification and nomenclator of gastropod families. Malacologia 47 (1–2): 1–397.

[F62] Fisher, D. W. 1962. Small conoidal shells of uncertain affinities. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt W. Miscellanea: Conodonts, Conoidal Shells of Uncertain Affinities, Worms, Trace Fossils and Problematica pp. W98–W143. Geological Society of America, and University of Kansas Press.

[KC60] Knight, J. B., L. R. Cox, A. M. Keen, R. L. Batten, E. L. Yochelson & R. Robertson. 1960. Gastropoda: systematic descriptions. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt I. Mollusca 1: Mollusca—General Features, Scaphopoda, Amphineura, Monoplacophora, Gastropoda—General Features, Archaeogastropoda and some (mainly Paleozoic) Caenogastropoda and Opisthobranchia pp. I169–I331. Geological Society of America, and University of Kansas Press.

[W01] Wagner, P. J. 2001. Gastropod phylogenetics: progress, problems and implications. Journal of Paleontology 75 (6): 1128–1140.