Lechritrochoceratidae

Lechritrochoceratidae is a family of derived tarphycerids from the middle and upper Silurian, once included in the now largely abandoned Barrandeocerida.

Lechritrochoceratidae
Temporal range: Mid-Late Silurian
Peismoceras optatum from Czech Republic, at the National Museum (Prague)
Scientific classification
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Lechritrochoceratidae

Flower, 1950
Genera

see text

Description

Lechritrochoceratidae comprise dextrally torticonic genera with costate shells and ventrally displaced siphuncles. Offset coiling in low spired. Rate of expansion and coarseness of costae vary, genus to genus. Costae are generally narrow and sharp with wide areas between and slant dorso-ventrally toward the apex.

Genera

Six genera have been described:

Lechritrochoceras
Catyrephoceras
Leurotrochoceras
Peismoceras
Systrophoceras
Trochodicyoceras

References

  • Sweet, Walter C. 1964. Nautiloidea -Barrandeocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc. of America and Univ of Kansas press.
  • Lechritrochoceratidae -Paleodb
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