Marine Snails: Ceriths, Nassas and Conchs, Part 2 Codexery

Laevistrombus maxwelli

A distinct true conch with a heavy, glossy shell.

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Laevistrombus maxwelli is a marine gastropod mollusk belonging to the family Strombidae, the true conches. It stands apart from other members of its genus due to several distinctive features.

The species was named in honor of Stephen J. Maxwell, a researcher at James Cook University in Cairns, Australia, whose work on the Strombidae family led to his surname being included in the scientific name.

The shell of L. maxwelli is smooth, glossy, and heavy for its size, with a broad shape relative to its length. Its form is a triangulated oval, and the aperture is wider at the back and narrower toward the front. The lip around the aperture is thick and curves upward toward the second suture, while the columella is also thick, extending from its center to the front. The upper body whorl is globe-shaped, and the spire is both taller and wider than in related species.

The dorsal surface and the area near the outer lip are white, while the last body whorl shows a tan color that becomes lighter near the inner lip. Darker markings appear on the body whorls.

A study comparing this species to others in the genus Laevistrombus found that L. maxwelli is morphologically very distinct. In that study, shell length ranged from 54.0 mm to 63.4 mm, and shell width from 38.0 mm to 43.8 mm.

L. maxwelli occurs along the coast from Chonburi to Trat province in the Gulf of Thailand, as well as in northern Borneo and the southern Philippines. Its type locality is Chonburi, in the northeastern Gulf of Thailand. The original holotype and additional paratypes were collected on the surface of, or buried in, sand at low tide.

Scientific classification

  1. KingdomAnimalia
  2. PhylumMollusca
  3. ClassGastropoda
  4. SubclassCaenogastropoda
  5. OrderLittorinimorpha
  6. FamilyStrombidae
  7. GenusLaevistrombus
  8. SpeciesLaevistrombus maxwelli

Named by Gra-tes, 2022

Sources: Wikipedia taxobox: Laevistrombus maxwelli (CC BY-SA 4.0) · order, family and genus agree with WoRMS AphiaID 1616156 (CC BY 4.0)

How big is it?

Size comparison: Laevistrombus maxwelli and a personA 0.06 m long laevistrombus maxwelli drawn to scale next to a 1.8 m tall person. Schematic shapes, not a likeness.0.06 m1.8 m

Largest length in the source, 0.06 m, next to a 1.8 m person.

Diagram: drawn by Codexery, schematic shapes to scale (not a likeness). Length: Wikipedia: Laevistrombus maxwelli

Where the laevistrombus maxwelli has been recorded

Where the laevistrombus maxwelli has been recordedPlaces named in the text; marked places: Cairns, Chonburi, Trat province, Gulf of ThailandCairnsChonburiTrat provinceGulf of Thailand

Map: drawn by Codexery. Data: Natural Earth basemap (public domain) · place coordinates: Wikipedia (CC BY-SA 4.0)

Quick Facts

Shell length range
54.0 mm (2.1 in) to 63.4 mm (2.5 in)
Shell width range
38.0 mm (1.5 in) to 43.8 mm (1.7 in)
Type locality
Chonburi, northeast of the Gulf of Thailand
Distribution
Coast of Chonburi to Trat province, Gulf of Thailand; also northern Borneo and southern Philippines

Facts from the source article.

More in Marine Snails: Ceriths, Nassas and Conchs

Sources

Compiled from Wikipedia and the sources listed below. Text from Wikipedia is available under CC BY-SA 4.0; this entry is adapted from it.

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