''Xeroplexa arrabidensis'' is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of air-breathing

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as ...

, a terrestrial

pulmonate Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includ ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

in the family

Geomitridae Geomitridae is a Taxonomy (biology), taxonomic Family (biology), family of small to medium-sized air-breathing land snails, Terrestrial molluscs, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.MolluscaBase eds. (2021). M ...

. MolluscaBase eds. (2022). MolluscaBase. Xeroplexa arrabidensis (G. A. Holyoak & D. T. Holyoak, 2014). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1308891 on 2022-07-30 The species epithet ''arrabidensis'' is an adjective derived from the type locality

Serra da Arrábida Serra (Latin for "saw") may refer to: People * Serra (footballer) (born 1961), Portuguese footballer * Serra (surname) * Serra (given name) Cities, towns, municipalities Brazil *Serra, Espírito Santo, a city in the Greater Vitória area *Ampar ...

Description

Shape convex to low-convex above, flattened below.

Whorls A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral d ...

rounded, with shallow to very shallow sutures. Umbilicus moderately wide, symmetrical, deep, exposing upper whorls, usually slightly overlapped by reflected peristome. Mouth broadly oval, except where interrupted by penultimate whorl; last part of body whorl expanding, descending near mouth. Shell moderately thick, slightly translucent; surface glossy above and often strongly glossy below. Ground-colour pale brown throughout, or whitish beneath; upperside nearly always with brown to blackish-brown markings that are very variable in extent, but form sharply defined bands on only a minority of shells, consisting instead of interrupted bands or rows of irregular blotches, often with whitish rib crests; underside also with very variable dark markings, often in several thin interrupted bands; underside some- times mainly dark brown. Transverse ribs on upperside of shell ± regular on higher whorls of spire, becoming weak or partly absent on body whorl; on underside generally weaker.

Distribution

Endemic to

Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ...

, where mainly restricted to rocky limestone habitats in Estremadura (Sétubal District) extending from

westwards to near

Cabo Espichel Cabo Espichel is a cape situated on the western coast of the civil parish of Castelo, municipality of Sesimbra, in the Portuguese district of Setúbal. History Following the Chalcolithic, human tribes began to look for elevated locations in or ...

References

External links

* http://luisjavierchueca.com/research-3/candidula-s-l/ {{Taxonbar, from=Q65057329 arrabidensis Gastropods described in 2014