Alvania aglaja
| Alvania aglaja | |
|---|---|
 | |
| Shell of the holotype | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Rissooidea |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | †A. aglaja |
| Binomial name | |
| †Alvania aglaja De Stefani & Pantanelli, 1888 | |
Alvania aglaja is an extinct species of minute sea snail, a marine gastropod mollusc in the family Rissoidae. The species is known from Pliocene marine deposits in Tuscany, central Italy, and was first described by the Italian paleontologists Carlo De Stefani and Domenico Pantanelli in 1888. It is one of numerous fossil species of Alvania described from the richly fossiliferous Pliocene sediments surrounding Siena.[1][2]
Taxonomy
Alvania aglaja was described in 1888 by Carlo De Stefani and Domenico Pantanelli from fossil material collected in the Pliocene deposits around Siena, Tuscany. The species remains accepted as a valid extinct taxon in the World Register of Marine Species (WoRMS), which recognizes it within the genus Alvania and the family Rissoidae.[1]
Description
The shell is small, reaching approximately 4.3 mm in height and 2.0 mm in diameter.[1] Like other members of the genus Alvania, it possessed a high-spired shell composed of multiple whorls and belonged to the group of marine micromolluscs. The original species description and accompanying illustration by De Stefani and Pantanelli serve as the basis for its identification.[3]
Distribution and habitat
Fossils of A. aglaja have been recovered from marine Pliocene strata in the vicinity of Siena, Tuscany, Italy.[1] During the Pliocene, much of this region was submerged beneath a shallow sea, producing extensive fossil-bearing sediments that preserve a diverse marine molluscan fauna. Numerous extinct species of rissoid gastropods have been described from these deposits.[4]
Paleontology
The fossil assemblages of the Siena Basin represent one of Italy's best-studied Pliocene marine faunas. Species such as Alvania aglaja provide evidence of the high diversity of small marine gastropods inhabiting the warm shallow seas of the Mediterranean during the Pliocene, prior to climatic and sea-level changes associated with the onset of the Pleistocene.[5]
See also
References
- 1 2 3 4 MolluscaBase eds. (2024). Alvania aglaja De Stefani & Pantanelli, 1888 †. World Register of Marine Species. Accessed 1 February 2024.
- ↑ De Stefani, C.; Pantanelli, D. (1888). Iconografia dei nuovi molluschi pliocenici d'intorno Siena. Bullettino della Società Malacologica Italiana, 13: 181–223.
- ↑ De Stefani, C.; Pantanelli, D. (1888). Iconografia dei nuovi molluschi pliocenici d'intorno Siena. Bullettino della Società Malacologica Italiana, 13: 181–223.
- ↑ De Stefani, C.; Pantanelli, D. (1888). Iconografia dei nuovi molluschi pliocenici d'intorno Siena. Bullettino della Società Malacologica Italiana, 13: 181–223.
- ↑ De Stefani, C.; Pantanelli, D. (1888). Iconografia dei nuovi molluschi pliocenici d'intorno Siena. Bullettino della Società Malacologica Italiana, 13: 181–223.