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| Caridina clandestina Klotz, von Rintelen, Annawaty, Wowor & von Rintelen, 2023 |
Abstract
Caridina clandestina, new species, a riverine, endemic freshwater shrimp is described from the upper reaches of Lariang River watershed at Napu Valley in Central Sulawesi, Indonesia. The species is distinct in showing dimorphic chelae on the first and second pereiopods related to different feeding strategies (scraping vs. filter feeding) but related to neither sex nor age. Morphologically, this new species is similar to C. longidigita Cai & Wowor, 2007 and both morphologically and molecularly closely related to the C. pareparensis species group. However, the unusual dimorphic trophic morphology, the morphology of male sexual appendages, and genetic results (mtDNA) place the new species within the western Sulawesi clade of Caridina and distinguish the new species from all known congeners.
Key words. Atyidae, integrative taxonomy, endemic, freshwater stream, island biodiversity, dimorphism, trophic morphology, citizen science
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| Caridina clandestina, new species B, colouration of living specimen; C, specimen with chelae adapted for filter feeding. |
Caridina clandestina, new species
Distribution. Endemic to Sulawesi, and only known from the upper reaches of the Lariang River watershed in the Napu Valley of Central Sulawesi (Figs. 1, 4A).
Etymology. The new species name clandestina (Latin, nominative feminine singular for ‘clandestinus’, meaning secret, concealed) was proposed by Martin Rümmler, Berlin, Germany. His suggestion was picked as being most suitable for this unusual species, among almost 100 other suggestions given by radio listeners (see Introduction). The name refers to its previously well-hidden occurrence in a double sense – occurring only in a small remote area and thus not collected until 2005, and the two existing morphs of this species that were only recently discovered.
Common name. Secret Sulawesi Shrimp.
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| A, Lariang River, natural habitat of Caridina clandestina, new species |
Werner Klotz, Thomas von Rintelen, Annawaty Annawaty, Daisy Wowor and Kristina von Rintelen. 2023. Caridina clandestina, new species, An Unusual New Freshwater Shrimp (Crustacea: Decapoda: Atyidae) from the remote high elevation Napu Valley of Sulawesi, Indonesia. RAFFLES BULLETIN OF ZOOLOGY. 71; 12–25. DOI: 10.26107/RBZ-2023-0002
