Diacyclops Kiefer 1927
Creators: name: Karanovic, Tomislav
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Copepoda
Cyclopoida
Cyclopidae
Diacyclops

description: Key to Australian species of Diacyclops:
1. Female antennula of less than 17 segments................................................................. 4
- Female antennula 17-segmented......................................................................... 2
2. Third endopodal segment of fourth leg with inner spine longer than outer spine.............. D. bisetosus (Rehberg, 1880)
- This segment with inner spine shorter than outer spine........................................................ 3
3. Principal caudal setae with breaking planes; dorsal caudal seta shorter than innermost caudal seta................................................................................................... D. bicuspidatus (Claus, 1857)
- Principal caudal setae without breaking planes; dorsal caudal seta longer than innermost caudal seta....... D. leijsi sp. nov. 4. Female antennula 10-segmented................................................... D. huntervalleyensis sp. nov.
- Female antennula of more than 10 segments................................................................ 5
5. Female antennula 11-segmented......................................................................... 6
- Female antennula 12-segmented......................................................................... 8
6. Exopod of first leg 2-segmented........................................................ D. tomlinsonae sp. nov.
- Exopod of first leg 3-segmented.......................................................................... 7
7. Third exopodal segment of first to fourth leg spine formula 2.3.3.3......................... D. cryonastes Morton, 1985
- This segment spine formula 3.4.4.3........................................................ D. hancocki sp. nov.
8. Outer principal caudal seta strongly reduced............................................ D. ballaballaensis sp. nov.
- Outer principal caudal seta well-developed................................................................. 9
9. First exopodal segment of first to fourth legs without inner seta................................................ 12
- This segment with with inner seta....................................................................... 10
10. Dorsal caudal seta as long as outer principal caudal seta................................. D. scanloni Karanovic, 2006
- Dorsal caudal seta shorter than outer principal caudal seta.................................................... 11
11. Labrum with very convex cutting edge............................ D. reidae De Laurentiis, Pesce & Humphreys, 1999
- Labrum with slightly convex cutting edge.......................... D. einslei De Laurentiis, Pesce & Humphreys, 1999
12. Dorsal caudal seta as long as outer principal caudal seta.............................. D. sobeprolatus Karanovic, 2006
- Dorsal caudal seta shorter than outer principal caudal seta.................................................... 13
13. Dorsal caudal seta about as long as innermost caudal seta............................... D. cockingi Karanovic, 2006
- Dorsal caudal seta much longer than innermost caudal seta................................................... 14
14. Seminal receptacle large and mushroom-like................................................ D. eberhardi sp. nov.
- Seminal receptacle small and ovoid...................................................................... 15
15. Third endopodal segment of fourth leg with two apical spines...... D. humphreysi humphreysi Pesce & De Laurentiis, 1996
- This segment with 1 apical spine....................................... D. humphreysi unispinosus Karanovic, 2006
description: Published as part of Karanovic, Tomislav, 2024, Six new species of Diacyclops (Copepoda: Cyclopoida) from Australia, pp. 101-143 in Zootaxa 5541 (2) on pages 139-140, DOI: 10.11646/zootaxa.5541.2.1, http://zenodo.org/record/14240870