Lioglyphostoma hendersoni

Lioglyphostoma hendersoni
Shell of Lioglyphostoma hendersoni, as illustrated in Bartsch (1934)
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Family: Pseudomelatomidae
Genus: Lioglyphostoma
Species:
L. hendersoni
Binomial name
Lioglyphostoma hendersoni
(Bartsch, 1934)
Synonyms[1]

Glyphostoma (Glyphostomops) hendersoni Bartsch, 1934

Lioglyphostoma hendersoni is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.[1]

Description

The shell is moderately large for the genus, elongate-conic in shape and milk-white in colour. It reaches a length of about 12.4 millimetres (0.49 in) and a diameter of about 4.5 millimetres (0.18 in), with most specimens ranging between 8 millimetres (0.31 in) and 12.5 millimetres (0.49 in) in length.[2]

The protoconch consists of about 2½ whorls, the last showing a moderately strong angulation situated roughly one third of the distance between the summit and the periphery. The teleoconch whorls are moderately rounded and sculptured with somewhat sinuous, retractively slanting axial ribs. These ribs increase in number on successive whorls, from about twelve on the early postnuclear turns to about twenty on the final whorl. They are somewhat weakened near the shoulder.[2]

In addition to the axial sculpture, the whorls bear strong spiral cords. One cord is present on the first postnuclear whorl, two on the second and third, three on the fourth, and four on the following turns; the last whorl bears five. The intersections of the axial ribs and spiral cords produce elongate nodules whose long axes are aligned parallel to the spiral sculpture. Fine growth lines are present across both the ribs and the intercostal spaces.[2]

The suture is moderately constricted, while the periphery of the whorls is well rounded. The base of the shell is moderately long and bears four nodulose spiral cords. The columella is rather long and moderately stout, marked by numerous spiral threads that become progressively weaker anteriorly.[2]

The aperture is relatively large. The outer lip is reinforced by a strong varix situated slightly behind the edge; from this projects a claw-like element into the aperture. Together with a strong denticle on the parietal wall, this structure gives the posterior canal an almost tubular appearance. The inner lip is covered by a thick callus reflected over the columella and parietal wall.[2]

Distribution

This marine species occurs in the western Atlantic Ocean, from off North Carolina, United States, southward through the Gulf of Mexico to Mexico, and also off eastern Brazil.

Type locality

The type specimen (USNM 411799) was collected 3.5 miles (5.6 km) southeast of Fowey Light, Florida, United States. Additional material in the original series came from various stations along the Florida coast.[2]

  • Lateral view of the shell (original illustration).
  • Protoconch detail.

References

  1. ^ a b "WoRMS - World Register of Marine Species - Lioglyphostoma hendersoni (Bartsch, 1934)". www.marinespecies.org. Retrieved 16 March 2026.
  2. ^ a b c d e f Bartsch, Paul (1934). Reports on the collections obtained by the first Johnson-Smithsonian deep-sea expedition to the Puerto Rican deep; new mollusks of the family Turritidae. Smithsonian Miscellaneous Collections. Vol. 91. Smithsonian Institution. pp. 17–18.
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