Bucaniidae is an extinct family of Paleozoic molluscs of uncertain position possibly being either gastropods or monoplacophorans in the superfamily Bellerophontoidea. The family lived from the Lower Ordovician to the Devonian and have shells in which the apertural margins tend to flare. Most genera have a slit and selenizone, others some modification of this feature.[2]
| Bucaniidae Temporal range: Lower Ordovician - Devonian
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| Family: | †Bucaniidae |
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Taxonomy
editThe taxonomy of the Gastropoda by Bouchet & Rocroi, 2005[3] categorizes Bucaniidae in the superfamily Bellerophontoidea, within the Paleozoic molluscs of uncertain systematic position with isostrophically coiled shells (Gastropoda or Monoplacophora).
J.B. Knight et al, in 1960[2] included the bucaniids in the Bellerophontidae as the subfamily Bucaniinae, and considered them true gastropods belonging to the prosobranch order, Archaeogastropoda, giving evidence that embryonic torson is not the cause of asymmetric coiling of typical gastropod shells. Physiologic restriction points to the viscera being turned 180 degrees with the gills and anus to the front and the aperture positioned to best facilitate retreat inward by the head and foot.
The Trestise Part I divided the Bucaniinae into two tribes, the Bucaniides, in which the exhalent emargination is a short slit, and the Salpingostoma in which the exhalent orifice consists of one or more holes in series, known as trema.
Bouchet & Rocroi, (2005) have elevated the tribes Bucaniides and Salpingostoma to the subfamilies Bucaniinae and Salpingostomatinae. They added the subfamilies, Undulabucaniinae and Plectonotinae which includes the tribes Plectonotini and Boucotonotini.
Genera
editGenera in the family Bucaniidae include:
- Bucania Hall, 1847 - type genus Ordovician and Silurian.[4]
- Salpingostoma Roemer, 1876[5] Ordovician and Silurian.[4]
- †Phragmolites Conrad 1838
(incomplete list)
Original description
editFamily Bucaniidae was originally described by Ulrich and Scofield in 1897.[1]
The type description reads as follows:
Symmetric, involute shells; whorls rather numerous, merely in contact, or embracing slightly, all visible in the umbilicus; aperture often expanded abruptly; dorsal slit-band distinct, the slit itself generally very long and narrow, sometimes represented by a row of openings; surface with transverse lamellae or lines, usually crossed at right angles by short ribs.
References
editThis article incorporates public domain text from reference.[1]
- ^ a b c Ulrich E. O. & Scofield W. H. 1897. The Lower Silurian Gastropoda of Minnesota. In: Ulrich E. O., Scofield W. H., Clarke J. M. & Winchell N. H. The Geological and Natural History Survey of Minnesota, volume 3(2), Harrison and Smith, Minneapolis, 48 plates. Pages 813-1081, plates 61-82. Bucaniidae on page 849.
- ^ a b J.Brooks Knight; et al. (1960). R.C. Moore (ed.). Part I, Mollusca 1. Treatise on Invertebrate Paleontology. Lawrence, Kansas: Geological Society of America and University of Kansas Press. p. I171 - I184.
- ^ Bouchet P. & Rocroi J.-P. (Ed.); Frýda J., Hausdorf B., Ponder W., Valdés Á. & Warén A. 2005. Classification and nomenclator of gastropod families. Malacologia: International Journal of Malacology, 47(1-2). ConchBooks: Hackenheim, Germany. ISBN 3-925919-72-4. ISSN 0076-2997. 397 pp. http://www.vliz.be/Vmdcdata/imis2/ref.php?refid=78278
- ^ a b Dall W. H. 1913. Gastropods. In: Eastman C. R. Text Book of Paleontology edited by C. R. Eastman adapted from German of K. A. von Zittel, 2nd edition revised and enlarged by the editor in collaboration with the following named specialists: R.S. Bassler, W. H. Dall, C. D. Walcott. Volume 1. MacMillan & Co., London. xii + 839 pp. Page 521.
- ^ Roemer C. F. 1876. Lethaea geognostica oder Beschreibung und Abbildung der für die Gebirgs-Formationen bezeichnendsten Versteinerungen. I. Theil: Lethaea palaeozoica. Atlas.