McCormack Robert B, Ahyong Shane T
Australian Crayfish Project, c/- Australian Aquatic Biological Pty Ltd, P.O. Box 3, Karuah, NSW, 2324, Australia, and Research Associate, Carnegie Museum of Natural History, Section of Invertebrate Zoology, 4400 Forbes Avenue, Pittsburgh, PA 15213-4080 USA..
Zootaxa. 2017 Mar 22;4244(4):556-567. doi: 10.11646/zootaxa.4244.4.6.
Euastacus vesper sp. nov., is described from the upper Cudgegong River, Coricudgy State Forest, New South Wales, Australia. The new species occurs in the western drainage of the Great Dividing Range, and is most closely related to E. spinifer (Heller, 1865), which occurs on the eastern side of the range. Euastacus vesper differs from E. spinifer by its considerably smaller maximum size (OCL 67.9 mm versus 116.7 mm), greater degree of thoracic spination loosely arrayed in three instead of two rows and absence of the antennular basipodite and coxopodite spines. Observations on burrowing, ecological preferences and biology are presented.
新种夜尤氏螯虾（Euastacus vesper sp. nov.）描述于澳大利亚新南威尔士州科里库奇国家森林的上库奇贡河。该新物种出现在大分水岭的西部排水区，与分布在该山脉东侧的棘尤氏螯虾（E. spinifer，赫勒，1865年）关系最为密切。夜尤氏螯虾与棘尤氏螯虾的区别在于其最大体型明显较小（眼柄长度67.9毫米对116.7毫米），胸部的刺更多，且呈松散的三排排列而非两排，并且没有触角基部节和基节的刺。文中还介绍了其掘穴行为、生态偏好和生物学特性。
