Cymadusa
Creators: name: Peart, Rachael A.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Ampithoidae
Cymadusa

description: Key to world species of Cymadusa *
1 Antenna 1 accessory flagellum 1-articulate ............................................................................................... 2
- Antenna 1 accessory flagellum 2-articulate .............................................................................................. 17
2 Epimeron 3 posteroventral corner with an acute tooth (Fig. 21) ............................................................... 3
- Epimeron 3 posteroventral corner not produced as a tooth (Fig. 29) ........................................................ 6
3 Gnathopod 2 palm entire (Fig. 35) ............................................................................... C. pemptos sp. nov.
- Gnathopod 2 palm excavate (Fig. 17) ........................................................................................................ 4
4 Gnathopod 2 with strongly setose margins (Fig. 26) ............................................... C. lunata Myers, 1985
- Gnathopod 2 with sparsely setose margins (Fig. 23) ................................................................................. 5
5 Gnathopod 2 dactylus tapering evenly to an acute tip .................................. C. grossimana Ledoyer, 1984
- Gnathopod 2 dactylus blunt not tapering ............................................. C. cavimana (Sivaprakasam, 1970)
6 Gnathopod 2 palm without midmedial tooth (Fig. 31) .............................................................................. 7
- Gnathopod 2 palm with midmedial tooth (Fig. 17) ................................................................................. 12
7 Gnathopod 1 palm with tooth defining palm (Fig. 31) .............................................................................. 8
- Gnathopod 1 palm without tooth defining palm (Fig. 39) ....................................................................... 11
8 Gnathopod 2 propodus produced to form distal lobe (Fig. 35) .................................... C. thagaay sp. nov.
- Gnathopod 2 propodus not produced to form lobe (Fig. 14) ..................................................................... 9
9 Uropod 3 outer ramus denticles present ................................................................... C. heronensis sp. nov.
- Uropod 3 outer ramus denticles absent .................................................................................................... 10
10 Uropod 3 outer ramus shorter than inner ramus .................................. C. bilobata pillipes (Ledoyer, 1984)
- Uropod 3 outer ramus subequal in length to inner ramus ................................... C. bilobata (Ruffo, 1969)
11 Gnathopod 2 with long plumose setae on margins (Fig. 39) .......................................... C. wistari sp. nov.
- Gnathopod 2 with long simple setae on margins (Fig. 6) ........................................... C. elegantis sp. nov.
12 Uropod 3 peduncle with marginal robust setae (Fig. 18) ........................................................................ 13
- Uropod 3 peduncle without marginal robust setae (Fig. 3) ..................................................................... 15
13 Gnathopod 2 palm entire (Fig. 35) .......................................................................................................... 14
- Gnathopod 2 palm excavate (Fig. 17) ........................................................................... C. jiigurru sp. nov.
14 Gnathopod 1 palm without midmedial tooth .......................................... C. imbroglio Rabindranath, 1972
- Gnathopod 1 palm with rounded midmedial tooth ............................................ C. chalongana Peart, 2002
15 Uropod 3 peduncle with greater than 5 distal robust setae ....................... C. munnu Poore & Lowry, 1997
- Uropod 3 peduncle with less than 5 distal robust setae ........................................................................... 16
16 Gnathopod 1 palm with small tooth defining palm (Fig. 31) ................... C. mauritiensis (Ledoyer, 1978)
- Gnathopod 1 palm without tooth defining palm (Fig. 39) ................................. C. aungtonyae Peart, 2002
17 Epimeron 3 posteroventral corner with an acute tooth (Fig. 21) ............................................................. 18
- Epimeron 3 posteroventral corner not produced as a tooth (Fig. 29) ...................................................... 26
18 Gnathopod 2 with strongly setose margins (Fig. 26) ............................................................................... 19
- Gnathopod 2 with sparsely setose margins (Fig. 23) ............................................................................... 22
19 Gnathopod 2 propodus and carpus covered in dense, plumose setae ...................................................... 20
- Gnathopod carpus only covered with dense, plumose setae ................................. C. compta (Smith, 1873)
20 Gnathopod 1 merus produced to form a long, acute anteroventral lobe; carpus elongated and narrow .. 21
- Gnathopod 1 merus produced to form a small, subacute or rounded anteroventral lobe; carpus short and robust .................................................................................................................... C. tattersalli Peart, 2004
21 Gnathopod 2 with midpalmar tooth present ....................................................... C. setosa (Haswell, 1879)
- Gnathopod 2 with midpalmar tooth absent ............................................................. C. filosa Savigny, 1816
22 Gnathopod 2 palm with tooth defining palm ........................................................................................... 23
- Gnathopod 2 palm without tooth defining palm ...................................................................................... 24
23 Gnathopod 2 palm entire (Fig. 35) ............................................................... C. crassicornis (Costa, 1857)
- Gnathopod 2 palm excavate (Fig. 17) ........................................................ C. oceanica J.L. Barnard, 1955
24 Gnathopod 2 dactylus overreaching palm .............................................................. C. ledoyeri Peart, 2004
- Gnathopod 2 dactylus shorter than or subequal to palm .......................................................................... 25
25 Gnathopod 1 merus produced to form a long, acute anteroventral lobe ....................................................... ............................................................................................................. C. hawaiensis (Schellenberg, 1938)
- Gnathopod 1 merus produced to form a small, subacute or rounded anteroventral lobe ............................. ............................................................................................................................... C. vadosa Imbach, 1967
26 Uropod 3 peduncle with marginal robust setae (Fig. 18) ........................................................................ 27
- Uropod 3 peduncle without marginal robust setae (Fig. 3) ........................................... C. chuawe sp. nov.
27 Gnathopod 2 palm entire (Fig. 35) .......................................................................................................... 28
- Gnathopod 2 palm excavate (Fig. 17) ..................................................... C. brevidactyla (Chevreux, 1907)
28 Gnathopod 2 with midpalmar tooth present .................................................................. C. tishana sp. nov.
- Gnathopod 2 with midpalmar tooth absent ................................................................ C. panwa Peart, 2002
description: Published as part of Peart, Rachael A., 2007, A review of Australian Cymadusa (Crustacea: Amphipoda: Ampithoidae) with descriptions of eight new species, pp. 1-53 in Zootaxa 1540 on pages 3-4, DOI: 10.5281/zenodo.177791