PÉrez-Schultheiss Jorge, Pardo Luis Miguel
Área de Zoología de Invertebrados, Museo Nacional de Historia Natural de Chile, Casilla 787, Correo Central, Santiago, Chile..
Zootaxa. 2020 Oct 15;4861(1):zootaxa.4861.1.7. doi: 10.11646/zootaxa.4861.1.7.
A new species of amphipod of the family Ischyroceridae is described. Isaeopsis chiloensis n. sp. was discovered in association with the cancrid species Metacarcinus edwardsii and Romaleon setosum, in the inner sea around Chiloé Island, in Southern Chile. This represents the second species of the genus Isaeopsis, a group formerly known only from South African waters. The new species is characterized principally by the structure of the gnathopods, the propodus of pereopods 3-7 and the ornamentation of the outer ramus of uropod 3. The male gnathopod 2 has a prominent thumb in the posteroproximal margin of the propodus and the pereopods 3-7 are subchelate with the palm armed by a row of at least five strong setae. In addition, the apex of the outer ramus of uropod 3 bears a comb with more than thirty fine teeth. Isaeopsis chiloensis n. sp. is completely described and a series of illustrations is provided.
描述了等足目科的一种新的端足类动物。智利伊萨端足虫新种（Isaeopsis chiloensis n. sp.）是在智利南部奇洛埃岛周围内海与蟹类物种爱德华氏滨蟹（Metacarcinus edwardsii）和多刺长眼蟹（Romaleon setosum）一同被发现的。这是伊萨端足虫属的第二个物种，该属此前仅在南非海域有记录。新物种的主要特征在于颚足的结构、第3至7步足的掌节以及第3尾足外肢的纹饰。雄性第2颚足在掌节的后近端边缘有一个突出的拇指，第3至7步足呈亚螯状，掌部有一排至少五根强壮的刚毛。此外，第3尾足外肢的顶端有一个带有三十多颗细齿的梳状结构。对智利伊萨端足虫新种进行了完整描述并提供了一系列插图。
