Biology:Longchaeus maculosus

Short description: Species of sea snail

Longchaeus maculosus
Apertural view of a shell of Longchaeus maculosus (museum specimen at Naturalis Biodiversity Center)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Heterobranchia
Family:	Pyramidellidae
Genus:	Longchaeus
Species:	L. maculosus
Binomial name
Longchaeus maculosus Lamarck, 1822
Synonyms
Lonchaeus sulcatus A. Adams, 1853 Longchaeus sulcatus (A. Adams, 1854) Obeliscus sulcatus A. Adams, 1854 Obeliscus tessellatus A. Adams, 1854 Pyramidella maculosa Lamarck, 1822 Pyramidella sulcata (A. Adams, 1854) Pyramidella tessellata (A. Adams, 1854)

Longchaeus maculosus, common name the sulcate pyram, is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

Description

The length of the shell varies between 20 mm and 50 mm.

The grayish white shell is elongated, turreted, brilliant and pointed at its summit. It is slightly widened at its base nebulously longitudinally strigate with pale orange-chestnut, frequently breaking up into revolving series of dots. Its color is sometimes inclining to red, spotted with numerous brown spots arranged in transverse series, three in number upon each whorl, and five upon the body whorl. Upon its surface are seen large, brown, dull, and irregular spots.;Sometimes the points which adorn the shell are united, and form undulating, longitudinal lines. The spire is formed of fifteen or sixteen slightly convex, distinct whorls. The shallow suture is linear. The body whorl is short, and not perforated at the base. The small aperture is subovate, and at its depth are seen indistinct grooves. It is terminated at its base by a small, narrow, and shallow groove. The columella is somewhat arcuated, and presents three unequal folds towards the base.:The first is most projecting, and runs almost horizontally. The two others are small, oblique, and parallel. The outer lip is arcuated, thin, sharp and slightly convex.

Juvenile

var. tesselatus

Young specimens of this species are very slightly striated, and of a reddish color. Undulating lines and brown spots, distributed here and there, cover the shell. Some specimens are of a still redder color, and the points upon the shell are then more numerous, and of a deeper tint. The length of the shell varies between 18 mm and 50 mm.

Distribution

This marine species occurs in the Red Sea, off New Zealand and in the following locations of the Indian Ocean :

• Aldabra
• Madagascar
• Mascarene Basin
• Tanzania

References

• Dautzenberg, Ph. (1923). Liste préliminaire des mollusques marins de Madagascar et description de deux espèces nouvelles. J. conchyliol. 68: 21-74
• Kilburn, R.N. & Rippey, E. (1982) Sea Shells of Southern Africa. Macmillan South Africa, Johannesburg, xi + 249 pp. page(s): 129
• Drivas, J. & M. Jay (1988). Coquillages de La Réunion et de l'île Maurice
• Spencer, H.; Marshall. B. (2009). All Mollusca except Opisthobranchia. In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp

External links

• Lamarck, (J.-B. M.) de. (1822). Histoire naturelle des animaux sans vertèbres. Tome sixième, 2me partie. Paris: published by the Author, 232 pp.
• Adams, A. (1854). Monographs of the genera Eulima, Niso, Leiostraca, Obeliscus, Pyramidella, and Monoptygma. In G. B. Sowerby II (ed.), Thesaurus conchyliorum, or monographs of genera of shells. Vol. 2 (15): 793-825, pl. 169-172. London, privately published.
• "Pyramidella maculosa" (in en). Gastropods.com. http://www.gastropods.com/2/Shell_9412.shtml. 

Wikidata ☰ Q7263323 entry