Contents

Vertigo modesta

Vertigo modesta
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Heterobranchia
Order:	Stylommatophora
Family:	Vertiginidae
Subfamily:	Vertigininae
Genus:	Vertigo
Species:	V. modesta
Binomial name
Vertigo modesta (Say, 1824)
Synonyms
List Isthmia corpulenta E. S. Morse, 1865 · Pupa borealis Morelet, 1858 (junior synonym) Pupa corpulenta var. parietalis Ancey, 1887 · Pupa decora A. Gould, 1847 (junior synonym) Pupa hoppii Møller, 1842 (original name) Pupa modesta Say, 1824 (original combination) Vertigo (Boreovertigo) hoppii (Møller, 1842) · Vertigo (Boreovertigo) modesta (Say, 1824) alternate representation Vertigo (Glacivertigo) modesta (Say, 1824) ( ubgeneric classification) Vertigo (Vertigo) modesta (Say, 1824) · Vertigo castanea Sterki, 1892 (nomen nudum) Vertigo hoppii (Møller, 1842) (junior synonym) Vertigo modesta insculpta Pilsbry, 1919 · Vertigo modesta microphasma S. S. Berry, 1919

Vertigo modesta, common name the cross vertigo, is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod molluskormicromollusk in the family Vertiginidae, the whorl snails.^[1]

Subspecies

• Vertigo modesta castanea Pilsbry & Vanatta, 1900
• Vertigo modesta concinnula Cockerell, 1897
• Vertigo modesta modesta (Say, 1824)

(Described as Isthmia corpulenta) The shell is rimate perforate, elongate ovate, finely striated, polished, translucent, dark olive brown. The apex is round and obtuse. The shell contains four whorls, convex, tumid, wider at the base. The aperture is large, subcircular, with four obtuse teeth, one on the parietal margin, one on the columellar margin, and two on the outer lip. The peristome is slightly thickened and reflected.^[2]

This species is known to occur in a number of countries and islands including:

• Texas,^[3] USA.
• Utah, USA^[4]
• Great Britain
• and other areas

• Gould, A. A. (1847). [Description] of a new species of Physa, together with two other new species of North American shells. Proceedings of the Boston Society of Natural History. 2: 262–263.
• Ancey, C. F. (1887). Description of North American shells. The Conchologists' Exchange. 2(6): 79–80.
• Bank, R. A.; Neubert, E. (2017). Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16, 2017.
• Sysoev, A. V. & Schileyko, A. A. (2009). Land snails and slugs of Russia and adjacent countries. Sofia/Moskva (Pensoft). 312 pp., 142 plates.

Wikimedia Commons has media related to Vertigo modesta.

• Some info at: [1]
• Say, T. (1824). Class Mollusca. In: Narrative of an expedition to the source of St. Peter's River, Lake Winnepeek, Lake of the Woods, &c. &c. performed in the year 1823, by order of The Hon. J.C. Calhoun, Secretary of War, under the command of Stephen H. Long, Major U. S. T. E. compiled from the notes of Major Long, Messrs Say, Keating, and Calhoun, by William H. Keating, A. M. &c. H.C. Carey & I. Lea, Philadelphia. 2: 256-266, plates 14-15
• Sterki, V. (1892). Preliminary list of North American Pupidae (north of Mexico). The Nautilus. 6(1): 2-8.
• Pilsbry, H. A.; Cooke, C. M. (1918-1920). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 25: Pupillidae (Gastrocoptinae, Vertigininae). pp i-ix, 1-404, pls 1-34. Philadelphia, published by the Conchological Section, Academy of Natural Sciences.
• Berry, S. S. (1919). Three new alpine vertigos from California. The Nautilus. 33(2): 48-52
• Möller, H. P. C. (1842). Index Molluscorum Groenlandiae. Naturhistorisk Tidsskrift. 4: 76-97 (Copenhagen).
• Morelet, A. (1858). Coquilles terrestres du Kamtchatka. Journal de conchyliologie. 7 (1): 7-22
• Schileyko, A. A. & Rymzhanov, T. S. (2013). Fauna of land mollusks (Gastropoda, Pulmonata Terrestria) of Kazakhstan and adjacent territories. Moscow-Almaty: KMK Scientific Press. 389 pp