Eurytrochus
Genus of small, spirally lirate top snails from Oceania to Australia.
Eurytrochus is a genus of small sea snails, which are marine gastropod mollusks belonging to the subfamily Trochinae within the family Trochidae, commonly known as top snails. The shell of this genus is small, spirally ridged, flattened, and has an umbilicus. Its body whorl bends toward the opening, and the aperture itself is roughly square with rounded corners. The ends of the lips come close together and are joined by a callus, while the outer and basal lips have small crenulations on the inside.
These marine snails are found in Oceania, Japan, the Philippines, and parts of Australia, including New South Wales, Queensland, and Victoria.
The genus includes the following species: *Eurytrochus affinis*, *Eurytrochus bathyrhaphe*, *Eurytrochus blanfordianus*, *Eurytrochus charopiformis*, *Eurytrochus concinnus*, *Eurytrochus danieli*, *Eurytrochus fragarioides*, *Eurytrochus maccullochi*, *Eurytrochus reevei*, and *Eurytrochus strangei*. Some names have been placed into synonymy: *Eurytrochus affinis cognatus* is now considered a synonym of *Clanculus cognatus*; *Eurytrochus dacostana* is a synonym of *Eurytrochus strangei*; and *Eurytrochus sticticus* is of uncertain status.
Quick Facts
- Taxon
- Eurytrochus
- Type Species
- Clanculus danieli
- Type Species Authority
- Crosse, H., 1862
Facts from the source article.
Lore & Background
The shell of Eurytrochus is small, spirally lirate, depressed, and umbilicate. The body whorl is deflected toward the aperture, which is oblique and rounded-quadrangular. The terminations of the lips are approaching and connected by a callus, and the outer and basal lips are crenulated within.
This marine species occurs in Oceania, Japan, the Philippines, and Australia (New South Wales, Queensland, Victoria). The genus includes species such as Eurytrochus affinis, Eurytrochus bathyrhaphe, Eurytrochus blanfordianus, Eurytrochus charopiformis, Eurytrochus concinnus, Eurytrochus danieli, Eurytrochus fragarioides, Eurytrochus maccullochi, Eurytrochus reevei, and Eurytrochus strangei.
Some species have been brought into synonymy, including Eurytrochus affinis cognatus (synonym of Clanculus cognatus), Eurytrochus dacostana (synonym of Eurytrochus strangei), and Eurytrochus sticticus (uncertain).
Reader's Guide
Eurytrochus is a genus within the subfamily Trochinae of the family Trochidae, the top snails. Its significance lies in its distinctive shell morphology: small, spirally lirate, depressed, and umbilicate, with a deflected body whorl and a rounded-quadrangular aperture. The lips are approaching and connected by a callus, and the outer and basal lips are crenulated within. The genus is distributed across Oceania, Japan, the Philippines, and parts of Australia (New South Wales, Queensland, Victoria). The article lists ten species, including Eurytrochus affinis, Eurytrochus bathyrhaphe, and others, as well as synonyms such as Eurytrochus affinis cognatus (now Clanculus cognatus) and Eurytrochus dacostana (now Eurytrochus strangei). One species, Eurytrochus sticticus, is noted as uncertain. The legacy of Eurytrochus is tied to its taxonomic placement and the morphological features that distinguish it within the Trochidae family, as documented in references by Hedley (1923) and Iredale & McMichael (1962).
Did You Know?
- Eurytrochus is a genus of sea snails in the subfamily Trochinae of the family Trochidae.
- One species, Eurytrochus sticticus, is listed as uncertain.
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