| Donaldina Temporal range: | |
|---|---|
 | |
| A Donaldina sp. cross section from the Moscovian of Pennsylvania | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| (unranked): | clade Heterobranchia clade |
| Superfamily: | |
| Family: | |
| Genus: | Dondaldina Knight, 1933 |
Dondaldina is an extinct genus of high-spired sea snails from the Carboniferous.
The genus was described by James Brookes Knight in 1933. [1]
Monoplacophora, meaning "bearing one plate", is a polyphyletic superclass of molluscs with a cap-like shell now living at the bottom of the deep sea. Extant representatives were not recognized as such until 1952; previously they were known only from the fossil record, and were thought to have become extinct 375 million years ago.
Bellerophon is a genus of extinct paleozoic marine molluscs of uncertain position in the family Bellerophontidae.
Strepsodiscus is an extinct genus of very primitive fossil snail-like molluscs from the early part of the Late Cambrian of North America. The coiled, slightly asymmetrical shells are about 3 cm in height. It is not known whether these are shells of gastropods or monoplacophorans, which are more primitive mollusks.
The Bellerophontidae are an extinct family of specialized globose bellerophontids, Paleozoic and early Triassic mollusks of the class Gastropoda.
Ceolodiscus is a genus in the gastropod family Euomphalidae from the Lower and Middle Jurassic of Europe. The shell is small but stocky; involute or with a slightly protruding spire. Whorls are generally smooth, evenly rounded and slightly overlapping; umbilicus deep, aperture ovate. Is the oldest known holoplanktonic gastropod, thanks to a bilateral symmetrical shells as an adaption to active swimming. Also the most common of the sea snails of the Posidonienschiefer Formation, it is also one of the most varied in size terms, with some of the biggest specimens of snail from the Lower Toarcian know. It has been related to large floating driftwood as one of the primary settlers.
Euomphalus is a genus of fossil marine gastropods known to have lived from the Silurian to the Middle Permian.
Bellerophontoidea, common name "bellerophonts", is a superfamily of extinct planospirally-coiled globose molluscs. This superfamily is generally included within the Gastropoda, but may instead be a group of monoplacophorans. The taxon first appeared late in the Cambrian and continued until late in the Triassic.
Bucanellidae is an extinct family of Paleozoic molluscs of uncertain position, belonging either to Gastropoda (snails) or Monoplacophora. The family lived from the upper Cambrian to middle Permian and the shells are characterized by a relatively small median sinus in the upper margin of the aperture, and collabral (transverse) or spiral (longitudinal) threads covering the shell. The shells are planispirally coiled rather than trochospirally with a spire as is the case with most shelled gastropods.
Diastomatidae is a family of sea snails, marine gastropod molluscs in the superfamily Cerithioidea.
Omphalotrochidae is an extinct taxonomic family of Paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?).
Trochonematidae is an extinct taxonomic family of fossil sea snails, marine gastropod molluscs in the superfamily Trochonematoidea.
Amphiscapha is a fossil gastropod mollusk, or less likely a monoplacophoran, genus from the Pennsylvanian and Lower Permian of North and South America, included in the family Euomphalidae. It is sometimes regarded as a subgenus of Straparollus, S. (Amphiscapha) Knight 1942
Sinutropis is a genus of fossil sea snails, extinct euomphalid archaeogastropods from the Upper Silurian.
Subulites is a genus of fossil sea snails, mud-dwelling marine gastropod mollusks known from the early-middle Ordovician, apparently allied with the Caenogastropoda.
This list, 2015 in molluscan paleontology, is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that have been described during the year 2015.
Donaldina may refer to:
This list 2019 in paleomalacology is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that are scheduled to be described during the year 2019, as well as other significant discoveries and events related to molluscan paleontology that are scheduled to occur in the year 2019.
This list 2020 in paleomalacology is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that are scheduled to be described during the year 2020, as well as other significant discoveries and events related to molluscan paleontology that are scheduled to occur in the year 2020.
Scalaridelphys is an extinct genus of aquiladelphid pediomyoid mammal from the Late Cretaceous (Turonian)-aged Straight Cliffs Formation of Utah. Initially named as Scalaria in 2020, the genus name was changed to Scalaridelphys in 2021 when the authors were told by B. Creisler that the name Scalaria was already in use for a now obsolete genus of gastropod named by Jean-Baptiste Lamarck in 1801. Two species of Scalaridelphys are known: the type species S. martini and S. aquilana.
Euphemites is an extinct genus of gastropod belonging to order Bellerophontida and family Euphemitidae. They may have been among the first burrowing gastropods.