Surites

Surites stenomphalus, from GB3D Type Fossils.

Belongs within: Polyptychitidae.

Surites is a genus of ammonites known from the Ryazanian of the Lower Cretaceous in northern Eurasia and North America (Wright et al. 1996).

Characters (from Wright et al. 1996): Compressed to inflated, evolute to involute, but all forms slowly uncoiling, with many whorls exposed in umbilicus; inner and middle whorls with strong, sharp ribbing; primary ribs bifurcating at or above midside into sharp, strong secondary ribs; secondary ribs moderately to strongly projected on venter. Macroconchs variocostate, some retaining only traces of circumumbilical, bullate primary ribs or faint secondary ribs on flattened venter.

<==Surites Sazonov 1951WCH96
    |--S. (Surites) (see below for synonymy)WCH96
    |    |--*S. (S.) pechorensis Sazonov 1951WCH96
    |    |--*Subpolyptychites’ distinctus Sazonova 1971WCH96
    |    |--*Chandomirovia’ ilekensis Sazonov 1951WCH96
    |    |--*Stchirowskiceras’ principale Sazonova 1971WCH96
    |    |--S. (S.) pseudostenomphalus (Sazonova 1971) (see below for synonymy)WCH96
    |    |--S. (S.) simplexWCH96
    |    |--S. (S.) spasskensisK79
    |    `--‘Stchirowskiceras (*Suridiscus)’ subprincipale Sazonova 1977WCH96
    |--S. (Bojarkia Shul’gina 1969)WCH96
    |    |--S. (*B.) mesezhnikowi (Shul’gina 1969) [=*Bojarkia mesezhnikowi]WCH96
    |    `--S. (B.) stenomphalusWCH96
    |--S. (Caseyiceras Sazonova 1971)WCH96
    |    |--S. (*C.) caseyi (Sazonova 1971) [=*Caseyiceras caseyi]WCH96
    |    `--S. (C.) analogusR81
    |--S. (Externiceras Sazonova 1971)WCH96
    |    `--S. (*E.) solowaticus (Bogolovskii 1897) [=Perisphinctes solowaticus]WCH96
    |--S. (Lynnia Casey 1973)WCH96
    |    `--S. (*L.) icenii Casey 1973WCH96
    `--S. (Praesurites Mesezhnikov & Alekseev in Mesezhnikov et al. 1983)WCH96
         `--S. (*P.) elegans Mesezhnikov & Alekseev in Mesezhnikov et al. 1983WCH96

Surites (Surites) pseudostenomphalus (Sazonova 1971) [=Bogolovskia pseudostenomphala; incl. Olcostephanus stenomphalus Sazonova 1965 non Pavlow 1890, *B. stenomphala]WCH96

Surites Sazonov 1951 (Surites) [incl. Bogoslovskia Sazonova 1965, Chandomirovia Sazonov 1951, Stchirowskiceras Sazonova 1971, Subpolyptychites Sazonova 1971, Suridiscus Sazonova 1977]WCH96

*Type species of generic name indicated

References

[K79] Kauffman, E. G. 1979. Cretaceous. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A418–A487. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[R81] Rawson, P. F. 1981. Early Cretaceous ammonite biostratigraphy and biogeography. In: House, M. R., & J. R. Senior (eds) The Ammonoidea: The evolution, classification, mode of life and geological usefulness of a major fossil group pp. 499–529. Academic Press.

[WCH96] Wright, C. W., J. H. Calloman & M. K. Howarth. 1996. Treatise on Invertebrate Paleontology pt L. Mollusca 4, revised vol. 4. Cretaceous Ammonoidea. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

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