Geomalacus oliveirae is a species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of air-breathing land slug

Slug

Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell...

, a terrestrial

Terrestrial animal

Terrestrial animals are animals that live predominantly or entirely on land , as compared with aquatic animals, which live predominantly or entirely in the water , or amphibians, which rely on a combination of aquatic and terrestrial habitats...

 pulmonate gastropod mollusc in the family Arionidae

Arionidae

Arionidae, common name the "roundback slugs" or "round back slugs" are a taxonomic family of air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the superfamily Arionoidea.- Distribution :...

, the round back slugs.

Distribution

Distribution of Geomalacus oliveirae include:

• Portugal (Beira Alta
  Beira Alta
  Beira Alta Province was a Portuguese province in the north of Portugal.Vast plateaus, river valleys, mountains, and castles abound in Beira Alta.Formerly it was part of the Beira Province.The two main cities were Guarda and Viseu...
  
  )
• Spain (Toledo
  Toledo, Spain
  Toledo's Alcázar became renowned in the 19th and 20th centuries as a military academy. At the outbreak of the Spanish Civil War in 1936 its garrison was famously besieged by Republican forces.-Economy:...
  
  , Cáceres
  Cáceres
  - Places :* Cáceres in Spain** Cáceres which covers the province* Cáceres, Spain, the capital of Cáceres Province* Cáceres, Antioquia, municipality in Colombia...
  
  , Salamanca
  Salamanca
  Salamanca is a city in western Spain, in the community of Castile and León. Because it is known for its beautiful buildings and urban environment, the Old City was declared a UNESCO World Heritage Site in 1988. It is the most important university city in Spain and is known for its contributions to...
  
  ) - Red List Spain: Sensitive to habitat change (Gómez Moliner et al. 2001).

Description

Geomalacus oliveirae is a slug light with 4 black colour bands, inner bands are irregularly interrupted, main marginal bands sharply delimited against the light background. The length of the body of preserved specimen is 20 mm.

Reproductive system

Reproductive system of gastropods

The reproductive system of gastropods varies greatly from one group to another within this very large and diverse taxonomic class of animals...

: Genital retractor inserts more anteriorly in the median line of dorsum than in the other species.

Ecology

Geomalacus oliveirae lives in Portugal in Mediterranean shrubland and on granitic substrate, also under Betula, Pinus and Juniperus trees, below 1300 m. It lives in Spain under Pinus and in olive orchards.