Rhachotropis

• Main Author: Lörz, Anne-Nina
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Eusiridae; Rhachotropis; Antarc*; Antarctic; Antarctica
• Online Access: https://doi.org/10.5281/zenodo.6204016; http://treatment.plazi.org/id/03B187EA127FFFF7FF0AFE4D06EEF97F

Key to Indo-Pacific and Antarctic species of Rhachotropis 1. Telson incised or cleft. 3 - Telson entire. 2 2. Pereonites laterally smooth, coxa 1 anteroventrally rounded. R. glorisae - Pereonites lateral process, coxa 1 anteroventrally pointed. R. chathamensis sp. nov. 3. Eyes present. 4 - Eyes absent. 15 4. Pereonites 6 and 7 with dorsal and dorsal lateral teeth. 26 - Pereonites 6 and 7 lacking dorsolateral teeth, urosomite 2 smooth. 5 5. Epimeral plate 3 with middorsal tooth. 6 - Epimeral plate 3 lacking middorsal tooth. 7 6. Pereonite 7 with carinae, telson cleft about 10%. R. boreopacifica - Pereonite 7 smooth or very small carinae, telson cleft about 50%. R. macropus 7. Urosomite 1 with tooth. 8 - Urosomite 1 lacking tooth. 9 8. Telson cleft about one third; dorsal protrusion on urosomite 1 not reaching end of urosomite 2. R. antarctica - Telson apically notched, about one tenths; dorsal protrusion on urosomite 1 extending length of urosomite 2. . R. barnardi 9. Pereonite 7 with middorsal tooth. 10 - Pereonite 7 lacking middorsal tooth. 11 10. Pereopods 3 and 4 dactylus long; inner margin uropod 3 setose. R. oculata - Pereopod 3 and 4 dactylus short; uropod 3 inner margin spinose. R. minuta 11. Pleonite 1 and 3 with strong dorsolateral teeth and ridge. R. inflata - Pleonite 1 and 3 lacking strong dorsolateral teeth and ridge. 12 12. Epimeron 1 with carinae or tooth. 13 - Epimeron 1 dorsally smooth, lacking teeth or carinae. 14 13. Pereopod 5 and 6 posterior margin of basis double or triple toothed. Antenna 1 shorter than antenna 2. . R. luculenta - Pereopod 5 and 6 posterior margin of basis smooth; Antenna 1 same length than antenna 2. R. schelllenbergi 14. Telson longer than uropod 3: gnathopods 1 and 2 propodi slender. R. elliotta - Telson shorter than uropod 3: gnathopods 1 and 2 propodi rounded. R. conlanae 15. Urosomite 1 with tooth or carinae. 16 - Urosomite 1 lacking tooth or carinae. 20 16. Epimeral plate 3 distinct dorsal tooth. 17 - Epimeral plate 3 lacking dorsal tooth. 18 17. Dorsolateral teeth ...