Cirolana Leach 1818
Creators: name: Bruce, Niel L.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Cirolanidae
Cirolana

description: Key to the males of Cirolana ‘ parva -group’ in Indonesia and Singapore
Females often cannot be identified without the presence of the males.
1. Antennula peduncle articles 1 and 2 distinct............................................................... 2
– Antennula peduncle articles 1 and 2 fused.................................................................. 3
2. Uropod apices deeply or shallow subequal bifid, lateral process prominent, appendix masculina straight and distally acute.. 4
– Uropod apices deeply and evenly bifid, appendix masculina laterally curved........................ Cirolana siamensis
3. Uropod apices deeply subequal bifid, pleotelson apex linguiform with 8 RS...................................... 5
– Uropod apices shallow and evenly bifid; pleotelson narrow with 6 RS.............................. Cirolana stenoura
4. Pereopod 1 with setal fringe, appendix masculina minimum 1.6 times as long as endopod........................... 6
– Pereopod 1 without setal fringe, appendix masculina maximum 1.5 times as long as endopod........................ 7
5. Penial openings medially united (separated by less than 4% of sternal 7 width), appendix masculina tip with microtrichs... 8
– Penial openings separated by more than 5% of sternal 7 width, appendix masculina tip without microtrichs............. 9
6. Pereopod 1 setal fringe present on merus to propodus, appendix masculina 1.6 times as long as endopod...................................................................................................... Cirolana arafurae
– Pereopod 1 setal fringe present on carpus to propodus, appendix masculina 1.9 times as long as endopod..................................................................................................... Cirolana thailandica
7. Endopod width to length ratio 40%, exopod width to length ratio 30%............................. Cirolana leptanga
– Endopod width to length ratio 50%, exopod width to length ratio 40%....................... Cirolana peisanae sp. nov.
8. Appendix masculina 1.4 times as long as endopod; distally straight........................... Cirolana andamanensis
– Appendix masculina 1.5 times as long as endopod; distally recurved............................. Cirolana improceros
9. Pereopod 1 with a single and continuous row of RS on merus inferior margin; appendix masculina 1.8 times as long as endo- pod............................................................................. Cirolana molari sp. nov.
– Pereopod 1 with a double row of RS on merus inferior margin; appendix masculina 1.6 times as long as endopod............................................................................................. Cirolana duo sp. nov.
description: Published as part of Bruce, Niel L., 2017, Review of the species of the Cirolana ' parva - group' (Cirolanidae: Isopoda: Crustacea) in Indonesian and Singaporean waters, pp. 401-435 in Zootaxa 4317 (3) on page 403, DOI: 10.11646/zootaxa.4317.3.1, http://zenodo.org/record/884630