''Gudeodiscus giardi'' 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 Terrestrial refers to things related to land or the planet Earth. Terrestrial may also refer to: * Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...

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

Plectopylidae Plectopylidae is a taxonomic family of large air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Plectopyloidea. MolluscaBase eds. (2021). MolluscaBase. Plectopylidae Möllendorff, 1898. Accessed through: Wor ...

. This species was described by French zoologist Pierre Marie Henri Fischer (1865-1916) (son of

Paul-Henri Fischer Paul Henri Fischer (also spelled Paul-Henri Fischer), (7 July 1835 Paris – 29 November 1893) was a French physician, zoologist and paleontologist. He is generally known as Paul Fischer. Biography He studied science and medicine, securing do ...

) in 1898.

Subspecies

* ''Gudeodiscus giardi giardi'' (Fischer, 1898) * ''Gudeodiscus giardi oharai'' Páll-Gergely, 2013Páll-Gergely B. & Hunyadi A. (2013). "The family Plectopylidae Möllendorff 1898 in China (Gastropoda, Pulmonata)". ''Archiv für Molluskenkunde'' 142(1): 1-66. . * ''Gudeodiscus giardi szekeresi'' Páll-Gergely & Hunyadi, 2013 The specific name ''giardi'' is in honor of French zoologist

Alfred Mathieu Giard Alfred Mathieu Giard (8 August 1846 – 8 August 1908) was a French zoologist born in Valenciennes. Biography In 1867 he began his studies of natural sciences at the École Normale Supérieure, followed by work as ''préparateur de zoologie'' a ...

. The subspecific name ''oharai'' is in honor of the collector Kenji Ohara. The subspecific name ''szekeresi'' is in honor of the malacologist Miklós Szekeres.

Distribution

The distribution of ''Gudeodiscus giardi'' includes

Cao Bằng Province Cao or CAO may refer to: Mythology *Cao (bull), a legendary bull in Meitei mythology Companies or organizations *Air China Cargo, ICAO airline designator CAO *CA Oradea, Romanian football club *CA Osasuna, Spanish football club *Canadian Associ ...

and the northern part of Lạng Sơn Province in

Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...

and western

Guangxi Guangxi (; ; Chinese postal romanization, alternately romanized as Kwanghsi; ; za, Gvangjsih, italics=yes), officially the Guangxi Zhuang Autonomous Region (GZAR), is an Autonomous regions of China, autonomous region of the People's Republic ...

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

. The type locality of ''Gudeodiscus giardi giardi'' is " Cao-Bang". ''Gudeodiscus giardi giardi'' lives in Vietnam and China. ''Gudeodiscus giardi oharai'' lives in are north of

Nanning Nanning (; ; za, Namzningz) is the capital and largest city by population of the Guangxi Zhuang Autonomous Region in Southern China. It is known as the "Green City" because of its abundance of lush subtropical foliage. Located in the South of ...

in Western Guangxi, China. ''Gudeodiscus giardi szekeresi'' live in the type locality only: Langur Reserve, 25 km southeast of

Chongzuo Chongzuo (; za, Cungzcoj) is a prefecture-level city in the south of Guangxi Zhuang Autonomous Region near the Sino-Vietnamese border. It is home to one of China's largest Zhuang populations. Geography and climate Chongzuo is located in sout ...

, China.

Description

The most important

shell Shell may refer to: Architecture and design * Shell (structure), a thin structure ** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses ** Thin-shell structure Science Biology * Seashell, a hard ou ...

characters for identification of ''Gudeodiscus giardi'' include: high and rather sharply defined shell shape, narrow umbilicus (for the genus ''Gudeodiscus'') and thick

peristome Peristome (from the Greek ''peri'', meaning 'around' or 'about', and ''stoma'', 'mouth') is an anatomical feature that surrounds an opening to an organ or structure. Some plants, fungi, and shelled gastropods have peristomes. In mosses In mosses, ...

. The size of the shell is small to large. The shape of the shell is high and rather sharply defined. The color of the shell is brownish, but some Chinese populations are small and yellow and translucent. The

sculpture Sculpture is the branch of the visual arts that operates in three dimensions. Sculpture is the three-dimensional art work which is physically presented in the dimensions of height, width and depth. It is one of the plastic arts. Durable sc ...

is usually finely reticulated, that is resulting in a matt surface. The umbilicus is deep. Apertural lip, callus and apertural fold are very well-developed (callus is very much elevated). Parietal wall has two lamellae. The anterior lamella is usually connected to the lower plica. Middle palatal plicae are short, depressed Z-shaped, or almost vertical, sometimes connected to each other. The width of the shell 13.5–21.3 mm. The height of the shell is 7.0–12.1 mm. The

radula The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food ...

of ''Gudeodiscus giardi'' has 12 lateral teeth and 15 marginal teeth. The size of the central tooth is as large as the ectocone of the first lateral. The shape of the first lateral is rhomboid and pointed. Marginal teeth are bicuspid or tricuspid with blunt inner cusp and shallow incision between the inner two cusps. The

reproductive system The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction. Many non-living substances such as fluids, hormones, and pheromones are als ...

of specimen from China was described by Páll-Gergely & Asami in 2014Páll-Gergely B. & Asami T. (2014). "Additional information on the distribution, anatomy and systematics of living and fossil Chinese Plectopylidae (Gastropoda: Pulmonata)". ''Genus'' 25(3): 527–564. and from Vietnam by Páll-Gergely et al. in 2015. Embryos were not recorded in the uterus. There were recorded hook-like or flat and oval calcareous granules on the internal surface of penis.

Ecology

It is a ground-dwelling species as all other plectopylid snails in Vietnam. It co-occur with other plectopylids in Vietnam: with '' Gudeodiscus anceyi'', '' Gudeodiscus francoisi'', ''

Sicradiscus mansuyi ''Sicradiscus mansuyi'' is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Plectopylidae. Distribution The distribution of ''Sicradiscus mansuyi'' includes Cao Bằng Province and Hà Giang Province ...

'' and with '' Gudeodiscus suprafilaris''. '' Gudeodiscus phlyarius'' live at geographically close sites to ''Gudeodiscus giardi''.

References

This article incorporates Creative Commons (CC-BY-4.0) text from the referencePáll-Gergely B., Hunyadi A., Ablett J., Luong Van H., Naggs F. & Asami T. (2015). "Systematics of the family Plectopylidae in Vietnam with additional information on Chinese taxa (Gastropoda, Pulmonata, Stylommatophora)". ''ZooKeys'' 473: 1–118. .

External links

{{Taxonbar, from=Q28432422 Plectopylidae Gastropods described in 1898