| Syrnola thelma | |
|---|---|
 | |
| Drawing of a fragment of a shell of Syrnola thelma | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Family: | Pyramidellidae |
| Genus: | Syrnola |
| Species: | †S. thelma |
| Binomial name | |
| †Syrnola thelma Dall, 1913 | |
Syrnola thelma is an extinct species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. [1]
The small shell has an elongate-conic shape. It has a smooth appearance, except for incremental lines. The suture is distinct but not deep. The apical portion is decollate. The aperture is narrowly ovate. The outer lip is simple and blunt. The base of the shell rounds into a strongly twisted short pillar. The body of the shell has no visible callus. The length of decollate fragment (two whorls) measures 2 mm, the diameter 1 mm. [1]
A fragment of the shell of this brackish water species has been found near Alexandria, Louisiana.
A spire is a part of the coiled shell of molluscs. The spire consists of all of the whorls except for the body whorl. Each spire whorl represents a rotation of 360°. A spire is part of the shell of a snail, a gastropod mollusc, a gastropod shell, and also the whorls of the shell in ammonites, which are fossil shelled cephalopods.
The decollate snail, scientific name Rumina decollata, is a medium-sized predatory land snail, a species of terrestrial pulmonate gastropod mollusk in the family Achatinidae. It is a European species that has been introduced in a number of areas worldwide.
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell.
Theodoxus fluviatilis, common name the river nerite, is a species of small freshwater and brackish water snail with a gill and an operculum, an aquatic gastropod mollusk in the family Neritidae, the nerites.
Eubela calyx is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Oospira duci is a species of air-breathing land snail, a terrestrial gastropod mollusk in the family Clausiliidae, the door snails.
Faunus ater is a species of brackish water snail with an operculum, an aquatic gastropod mollusk in the family Pachychilidae.
Aartsenia arctica is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. The species is one of the two species within the genus Aartsenia, with the exception of the other related species being Aartsenia candida.
Menestho hypocurta is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola is a genus of sea snails, marine gastropod molluscs in the subfamily Turbonillinae of the family Pyramidellidae, the pyrams and their allies.
Syrnola bifasciata, common name the two-banded pyramid shell, is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola collea is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola producta is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola pyrrha is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola subcinctella is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.
Iphiana tenuisculpta is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola tincta, common name the dyed pyramid shell, is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola adamsi is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola aurantiaca is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Syrnola violacea is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.