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| Caridina tashanica sp. nov. (both ovigerous females) from Tashan Cave, Khuzestan Province in southwestern Iran. Jugovic, Malek Hosseini & Zakšek, in Jugovic, Malek Hosseini, Fatemi, Flot, Kuntner et Zakšek, 2026. |
Abstract
A new cave species of atyid shrimp of the genus Caridina H. Milne Edwards, 1837 was discovered during a survey of a subterranean habitat in southwestern Iran (Khuzestan Province, Tashan Cave). This is the first record of a cave atyid shrimp in Iran and the first documented occurrence of a Caridina species inhabiting sulphidic groundwater. Phylogenetic analyses and genetic distances support the status of Caridina tashanica sp. nov. as a distinct species, closely related to C. shahrazadae. Morphologically, the new species is characterised by reduced eyes and pigmentation, and by an extremely elongated rostrum with numerous teeth. Males have specific, triangular endopodite of pleopod I, and a rod-like appendix masculina of pleopod II with numerous long setae. Ovigerous females lay relatively large, oval, white eggs, which clearly indicate a landlocked life cycle. This study contributes to the knowledge of atyid shrimps in the Middle East and to the subterranean biodiversity of the sulphidic Tashan Cave ecosystem in Iran.
Keywords: Atyids, groundwater, Middle East, subterranean, sulphidic, Tashan Cave
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| Photo of two cave shrimps Caridina tashanica sp. nov. (both ovigerous females) from Tashan Cave, Khuzestan Province in southwestern Iran. Photo credit: YF and MJMH, photographed on 8 December 2018. |
Caridina tashanica Jugovic, Malek Hosseini & Zakšek, sp. nov.
Diagnosis. Caridina tashanica sp. nov. is the only species of cave shrimp (depigmented and with strongly reduced eyes without pigmentation; Fig. 6) from Iran of the family Atyidae. It is characterised by an extremely long rostrum (Fig. 3) with numerous teeth (13–19+3–5/9–22), uropodal diaeresis with 7–10 spiniform setae and 4–6 pairs of dorsomarginal spiniform setae on the telson of which the distal pair is dorsomarginal-terminal. Propodus of pereiopod III and V bears only 7–14 and 9–18 spiniform setae, respectively, while dactylus of pereiopod V bears ...
Jure Jugovic, Mohammad-Javad Malek Hosseini, Yaser Fatemi, Jean-François Flot, Matjaž Kuntner and Valerija Zakšek. 2026. Caridina tashanica sp. nov., A New cave Shrimp Species (Decapoda, Atyidae) from Sulphidic Water in southwestern Iran. Subterranean Biology. 55: 137-160. DOI: doi.org/10.3897/subtbiol.55.184889 [23 Mar 2026]
