Caridina, FROM THE

Rintelen, Kristina von & Cai, Yixiong, 2009, Radiation Of Endemic Species Flocks In Ancient Lakes: Systematic Revision Of The Freshwater Shrimp Caridina H. Milne Edwards, 1837 (Crustacea: Decapoda: Atyidae) From The Ancient Lakes Of Sulawesi, Indonesia, With The Description Of Eight New Species, Raffles Bulletin of Zoology 57 (2), pp. 343-452 : 347

REVISION OF CARIDINA FROM THE ANCIENT LAKES OF SULAWESI

Identification keys to species from the ancient lakes of

Sulawesi. – Woltereck (1937a, b) mentioned the rostrum as a good character to delimit the different species she described from the Malili lakes: “…the rostrum varies in length, but the type does not change.” (Woltereck, 1937a: 228). Schenkel (1902) provided a detailed description of the rostrum in species from Lake Poso and included an elaborate table of rostral characters from one species. The recent examination of specimens from both lake systems confirmed that shape and denticulation of the rostrum are constant in the majority of the species. Therefore, the following morphological key is mainly based on rostral characters from adult specimens of both sexes (although it has to be mentioned that females are generally larger than males). It is not appropriate for the identification of most juveniles, though .

During sampling in the lakes, most species could easily be told apart (juveniles included) based on colour pattern, substrate, collecting site, or behaviour. Thus, an additional key for each lake system is provided for the quick preidentification of living animals in the field. Because each species flock is endemic to its respective lake system and both lake systems are completely isolated from each other, the key to living animals in the field is subdivided into species from the Malili lake system and from Lake Poso (and its river system).

All keys provided here are only applicable to species of Caridina from the ancient lakes of Sulawesi.