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assessment

The IUCN Red List of Threatened Species™
ISSN 2307-8235 (online)
IUCN 2008: T189396A8725974
Anodontites tenebricosus
Assessment by: Bogan, A.E. & Cummings, K.
View on www.iucnredlist.org
Citation: Bogan, A.E. & Cummings, K. 2011. Anodontites tenebricosus. The IUCN Red List of
Threatened Species 2011: e.T189396A8725974. http://dx.doi.org/10.2305/IUCN.UK.20112.RLTS.T189396A8725974.en
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THE IUCN RED LIST OF THREATENED SPECIES™
Taxonomy
Kingdom
Phylum
Class
Order
Family
Animalia
Mollusca
Bivalvia
Unionoida
Mycetopodidae
Taxon Name: Anodontites tenebricosus Lea, 1834
Synonym(s):
• Anodontites clessini
• Anodontites crispatus subspecies tenebricosus Mansur, 1970
• Anodontites soleniformis
• Anodontites tenebricosa
• Glabaris clessini
• Glabaris nehringi
• Mycetopus clessini
• Mycetopus plicatus
Assessment Information
Red List Category & Criteria:
Least Concern ver 3.1
Year Published:
2011
Date Assessed:
July 22, 2011
Justification:
Anodontites tenebricosus has been assessed as Least Concern, due to its wide distribution in Brazil,
Argentina, Uruguay and Peru. While this species is listed as Vulnerable (using IUCN categories) in the
Brazillian states of Paraná, Rio Grande do Sul, Santa Catarina and São Paulo, the reasons for these
listings are unclear. Additional research is needed on the species' population, ecology and taxonomy.
Particularly pending taxonomic revision, additional species may become recognised and some of these
may warrant an elevated IUCN categories in future reassessments. However, current knowledge of this
species does not warrant a higher threat category.
Geographic Range
Range Description:
This species is noted as being widely distributed, with widespread and disjunct distributions in
Colombia, the upper Amazon, coastal streams of southern Brazil and the Paraná Basin (K.Cummings
pers. comm. 2010). It is found in Brazil, Argentina, Peru and Uruguay (Ramírez et al. 2003, Mansur and
Pereira 2006, Scarabino and Mansur 2007, Rumi et al. 2008). In Brazil, it is reported from the states of
Rio Grande do Sul, São Paulo, Santa Catarina and Paraná (Ministerio do Meio Ambiente 2004, Mansur
and Pereira 2006, Castillo et al. 2007, Agudo 2008, Troncon et al. 2009). This species was listed by
Simone (2006) as occurring in "all South American basins, west of the Andes". Presumably he meant
east of the Andes, but regardless his concept of this species seems lumped and biogeographically
confusing (K.Cummings pers. comm. 2010).
© The IUCN Red List of Threatened Species: Anodontites tenebricosus – published in 2011.
http://dx.doi.org/10.2305/IUCN.UK.2011-2.RLTS.T189396A8725974.en
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Country Occurrence:
Native: Argentina; Brazil (Paraná, Rio Grande do Sul, Santa Catarina, São Paulo); Peru; Uruguay
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Distribution Map
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Population
There is no population information available for this species. It was found to be very common in the Rio
Uruguai in Brazil (Castellanos and Landoni 1990), but has since been listed as Vulnerable using IUCN
categories in the Brazilian states of Paraná, Rio Grande do Sul, Santa Catarina and São Paulo (Ministério
do Meio Ambiente 2004).
Current Population Trend: Unknown
Habitat and Ecology (see Appendix for additional information)
This species inhabits fast-flowing rivers with sandy and coarse substratum (Castellanos and Landoni
1990, Mansur and Pereira 2006, Troncon et al. 2009).
Systems: Freshwater
Threats (see Appendix for additional information)
The threats to this species are unknown. The introduced Asian mussel Limnoperna fortunei (Dunker,
1857) has been shown to outcompete some native freshwater mussels in South America (Darrigran and
Ezeurra de Drago 2000). It is not known, however, how the introduction of L. fortunei affects this
species.
Conservation Actions
There are no species-specific conservation measures in place for this species. It is listed as Vulnerable
using IUCN categories in the Brazilian states of Paraná, Rio Grande do Sul, Santa Catarina and São Paulo
(Ministério do Meio Ambiente 2004), however the reasons for this listing are unclear. This species has
often been confused with other bivalve species such as Anodontites soleniformis (Mansur and Pereira
2006). This species’ taxonomy requires clarification and further research is necessary to establish its
population size and ecology (Mansur and Pereira 2006).
Credits
Assessor(s):
Bogan, A.E. & Cummings, K.
Reviewer(s):
Böhm, M. & Collen, B.
Contributor(s):
Dyer, E., Soulsby, A.-M., Whitton, F., McGuinness, S., De Silva, R., Milligan, H.T.,
Kasthala, G., Herdson, R., Thorley, J., McMillan, K. & Collins, A.
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Bibliography
Agudo, A.I. 2008. Non-marine mollusc diversity in Paraná State, Southern Brasil. Tentacle 16: 10-13.
Castellanos, Z.J.A. and Landoni, N.A. 1990. La familia Mycetopodidae Gray, 1840 en la Republica
Argentina. In: R.A. Ringuelet (ed.), Fauna de Agua Dulce de la Republica Argentina, pp. 1-86. FECIC,
Buenos Aires, Argentina.
Castillo, A.R., Bortoluzzi, L.R. and Oliveira, E.V. 2007. DISTRIBUIÇÃO E DENSIDADE POPULACIONAL DE
Corbicula fluminea (Mueller, 1744) DO ARROIO IMBAÁ, RIO URUGUAI, URUGUAIANA, BRASIL.
Biodiversidade Pampeana 5(1): 25-29.
Darrigran, G. And Ezeurra de Drago, I. 2000. Invasion of the exotic freshwater mussel Limnoperna
fortunei (Dunker, 1857) (Bivalvia: Mytilidae) in South America. The Nautilus 114(2): 69-73.
IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.2). Available at: http://www.iucnredlist.org.
(Accessed: 10 November 2011).
Mansur, M.C.D. and Pereira, D. 2006. Bivalves límnicos da bacia do rio dos Sinos, Rio Grande do Sul,
Brasil (Bivalvia, Unionoida, Veneroida e Mytiloida). Revista Brasileira de Zoologia 23(4): 1123–1147.
Ministério do Meio Ambiente. 2004. Lista Nacional das Espécies de Invertebrados Aquáticos e Peixes
Ameaçadas de Extinção. Instrução Normativa No. 5 de 21 Maio 2004. Diário Oficial da União – Seção 1.
Brasília.
Ramírez, R., Paredes, C. and Arenas, J. 2003. Moluscos del Perú. Revista de Biología Tropical 51(3): 225284.
Rumi, A., Gutiérrez Gregoric, D.E., Núñez, V. and Darrigran, G.A. 2008. Malacología Latinoamericana:
Moluscos de agua dulce de Argentina. Revista de Biología Tropical 56(1): 77-111.
Scarabino, F. and Mansur, M.C.D. 2007. Lista sistemática de los bivalvia dulciacuícolas vivientes de
Uruguay. Comunicaciones de la Sociedad Malacológica del Uruguay 9(90): 89-99.
Simone L.R.L. 2006. Land and Freshwater Molluscs of Brazil. FAPESP, Sao Paulo.
Troncon, E.K., Vianna, M.P. and Avelar, W.E.P. 2009. Ocorrência de Anodontites tenebricosus (Lea, 1834)
(Bivalvia: Mycetopodidae) na bacia hidrográfica do rio Sapucaí, São Paulo, Brasil: Estudos da
morfometria da concha, análises dos fatores abióticos e sedimentologia do local. Anais do IX Congresso
de Ecologia do Brasil. São Lourenço.
Citation
Bogan, A.E. & Cummings, K. 2011. Anodontites tenebricosus. The IUCN Red List of Threatened Species
2011: e.T189396A8725974. http://dx.doi.org/10.2305/IUCN.UK.2011-2.RLTS.T189396A8725974.en
Disclaimer
To make use of this information, please check the Terms of Use.
External Resources
For Images and External Links to Additional Information, please see the Red List website.
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Appendix
Habitats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Habitat
Season
Suitability
Major
Importance?
5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent
Rivers/Streams/Creeks (includes waterfalls)
-
Suitable
Yes
Threats
Threat
Timing
Scope
Severity
Impact Score
8. Invasive & other problematic species & genes ->
8.1. Invasive non-native/alien species -> 8.1.2.
Named species (Limnoperna fortunei)
Ongoing
Unknown
Unknown
Unknown
Stresses:
2. Species Stresses -> 2.3. Indirect species effects ->
2.3.2. Competition
Research Needed
Research Needed
1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
Additional Data Fields
Population
Population severely fragmented: No
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The IUCN Red List Partnership
The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species
Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN
Red List Partners are: BirdLife International; Botanic Gardens Conservation International; Conservation
International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas
A&M University; Wildscreen; and Zoological Society of London.
THE IUCN RED LIST OF THREATENED SPECIES™

assessment

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