Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
| Autor: | Ludwig Buckup, Paula Beatriz Araujo, Kelly Martinez Gomes, Felipe Bezerra Ribeiro |
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| Rok vydání: | 2016 |
| Předmět: |
Male
0106 biological sciences 010607 zoology Fresh Water Astacoidea Biology 010603 evolutionary biology 01 natural sciences Malacostraca Animals Body Size Ecosystem Ecology Evolution Behavior and Systematics Telson Decapoda Animal Structures Seta Organ Size Anatomy biology.organism_classification Crayfish Parastacidae Dactylus Female Animal Science and Zoology Taxonomy (biology) Animal Distribution Brazil |
| Zdroj: | Zootaxa. 4158:301 |
| ISSN: | 1175-5334 1175-5326 |
| DOI: | 10.11646/zootaxa.4158.3.1 |
| Popis: | Two new species of Parastacus Huxley, 1879 are described from material collected in the state of Rio Grande do Sul, southern Brazil: Parastacus fluviatilis sp. nov. from highland streams and Parastacus caeruleodactylus sp. nov. from wetlands. Parastacus fluviatilis sp. nov. is distinguished mainly by large chelipeds with dense setae cover on the cutting edge of fingers, telson subtriangular with two lateral blunt spines and strongly concave ventral surface of lateral process of thoracic sternites 6 and 7. Parastacus caeruleodactylus sp. nov. is distinguished mainly by blue cheliped fingers and a large gap between them, reduced abdomen, dorsal and ventral margins of dactylus, propodus and carpus of second pair of pereiopods with tufts of long setae and mid-dorsal carina of exopod of uropods unarmed. According to IUCN Red List criteria both species are considered endangered. Habitat characterization and a method for defining the shape of second abdominal pleura are also provided. |
| Databáze: | OpenAIRE |
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