Chilina iguazuensis

Chilina iguazuensis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia ; clade Euthyneura ; clade Panpulmonata ; clade Hygrophila
Superfamily:	Chilinoidea
Family:	Chilinidae
Genus:	Chilina
Species:	C. iguazuensis
Binomial name
	Chilina iguazuensis; Gregoric & Rumi, 2008 [1]

Last updated March 19, 2019

Chilina iguazuensis is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Chilinidae.

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 sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. While these definitions may seem adequate, when looked at more closely they represent problematic species concepts. For example, the boundaries between closely related species become unclear with hybridisation, in a species complex of hundreds of similar microspecies, and in a ring species. Also, among organisms that reproduce only asexually, the concept of a reproductive species breaks down, and each clone is potentially a microspecies.

Freshwater snails are gastropod mollusks which live in freshwater. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs to major rivers. The great majority of freshwater gastropods have a shell, with very few exceptions. Some groups of snails that live in freshwater respire using gills, whereas other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung. Most feed on algae, but many are detritivors and some are filter feeders.

An aquatic animal is an animal, either vertebrate or invertebrate, which lives in the water for most or all of its lifetime. Many insects such as mosquitoes, mayflies, dragonflies and caddisflies have aquatic larvae, with winged adults. Aquatic animals may breathe air or extract oxygen that dissolved in water through specialised organs called gills, or directly through the skin. Natural environments and the animals that live in them can be categorized as aquatic (water) or terrestrial (land). This designation is paraphyletic.

In zoological nomenclature, the specific name is the second part within the scientific name of a species. The first part of the name of a species is the name of the genus or the generic name. The rules and regulations governing the giving of a new species name are explained in the article species description.

The Iguazu River is a river in Brazil and Argentina. It is an important tributary of the Paraná River. The Iguazu River is 1,320 kilometres (820 mi) long, with a drainage basin of 62,000 square kilometres (24,000 sq mi).

Distribution

Chilina iguazuensis is endemic to Iguazú National Park, Misiones Province, Argentina. It lives in the Upper Iguazú River there.^[1]

The Iguazú National Park is a national park of Argentina, located in the Iguazú Department, in the north of the province of Misiones, Argentine Mesopotamia. It has an area of 677 km² (261 sq mi).

Misiones is one of the 23 provinces of Argentina, located in the northeastern corner of the country in the Mesopotamia region. It is surrounded by Paraguay to the northwest, Brazil to the north, east and south, and Corrientes Province of Argentina to the southwest.

Ecology

This snail species lives in the rapids of Upper Iguazú River.^[1]

Rapids A section of a river where the river bed is relatively steep, increasing the waters velocity and turbulence

Rapids are sections of a river where the river bed has a relatively steep gradient, causing an increase in water velocity and turbulence.

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Chilina fulgurata is a species of air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Chilinidae.

Chilina is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the superfamily Chilinoidea.

Gundlachia ticaga is a species of minute freshwater snail or limpet, an aquatic gastropod mollusc in the family Planorbidae, the ram's horn snails and their allies.

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Microporellus iguazuensis is a species of poroid fungus in the family Polyporaceae. Found in South America, it was described as a new species in 1987 by mycologist Mario Rajchenberg. The type was collected in Misiones Province, Argentina, in the Iguazú National Park. Characteristics of the fungus include the fruit body comprising a lateral stipe and multiple fan- or spoon-shaped caps. Microscopic characters include the dimitic hyphal system, relatively large basidia measuring 23–31 by 8–9 μm, and large ellipsoid to egg-shaped spores measuring 7–9 by 5–6 μm. The fungus was redescribed 23 years later after it was found in a polypore survey in the Atlantic rainforest of Rio Grande do Sul, southern Brazil. There it was growing on the ground amongst leaf litter, connected to roots of a living tree of Ocotea indecora.

References

1 2 3 Gregoric D. E. G. & Rumi A. (2008) "Chilina iguazuensis (Gastropoda: Chilinidae), New Species From Iguazú National Park, Argentina". Malacologia 50(1): 321-330. doi:10.4002/0076-2997-50.1-2.321.

External links

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[Gregoric-1] 1 2 3 Gregoric D. E. G. & Rumi A. (2008) "Chilina iguazuensis (Gastropoda: Chilinidae), New Species From Iguazú National Park, Argentina". Malacologia 50(1): 321-330. doi:10.4002/0076-2997-50.1-2.321.