Cryptopontius Giesbrecht 1899
Creators: name: Farias, Amilcar
name: Neves, Elizabeth G.
name: Johnsson, Rodrigo
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Maxillopoda
Siphonostomatoida
Artotrogidae
Cryptopontius

description: Key to the species of the genus Cryptopontius
1. Endopod of leg 4 reduced to a single segment ….......................................... C. digitatus Kim, 1996
- Endopod of leg 4 absent …............................................................................. 2
2(1). Antennule with 7 segments proximal to fused ancestral segments IX–XII, with ancestral segments III–IV fused …............................................................................ C. aesthetascus Neves & Johnsson, 2008
- Antennule with less than 7 segments proximal to fused ancestral segments IX–XII ….............................. 3
3(2). Antennule with 5 segments proximal to fused ancestral segments IX–XII, with ancestral segments III–VI fused ….......................................................................................... C. pentadikos sp. nov.
- Antennule with less than 5 segments proximal to fused ancestral segments IX–XII...............................… 4
4(3). Female antennule 8-segmented …........................................................................ 5
- Female antennule with more than 8-segmented ….......................................................... 11
5(4). Caudal rami longer than anal somite ….................................................................... 6
- Caudal rami shorter than anal somite ….................................................. C. ricinius Malt, 1991
6(5). Second endopodal segment of leg 1 armed with one or two setae …............................................. 7
- Second endopodal segment of leg 1 unarmed …......................................... C. ignotus (Brady, 1910)
7(6). Second endopodal segment of leg 1 with single seta …....................................................... 8
- Second endopodal segment of leg 1 with two setae …........................................................ 9
8(7). Antennal exopod with single seta …..................................................... C. latus (Brady, 1910)
- Antennal exopod with two setae …...................................................... C. minor Stock, 1965
9(7). Third exopodal segment of leg 1 with eight elements......................................................… 10
- Third exopodal segment of leg 1 with seven elements …................................. C. quinquesetus Kim, 1996
10(9). Third endopodal segment of leg 1 with six setae and three setae on the free segment of leg 5................................................................................................ C. expletus Neves & Johnsson, 2008
- Third endopodal segment of leg 1 with five setae and two setae on the free segment of leg 5 ….. C. donghaensis Kim, 1996
11(4) Female antennule 9-segmented …....................................................................... 12
- Female antennule 10-segmented …..................................................................... 24
12 (5). Third exopodal segment of leg 4 with eight elements …...................................................... 13
- Third exopodal segment of leg 4 with nine elements...................................................... …14
13 (12) Free segment of female leg 5 longer than wide, male antennule 9-segmented …............... C. longipes Nicholls, 1944
- Free segment of female leg 5 wider than long, male antennule 10-segmented....................... C. acutus Kim 2007
14(12). Second endopodal segment of leg 1 with two setae …....................................................... 15
- Second endopodal segment of leg 1 with one seta …........................................................ 21
15(14). Maxillule outer lobe with three setae …........................................ C. brevifurcatus (Giesbrecht, 1895)
- Maxillule outer lobe with two setae …................................................................... 16
16(15). Maxillule inner lobe with one seta …............................................. C. paracapitalis Nicholls, 1944
- Maxillule inner lobe with more than one seta …............................................................ 17
17(16). Maxillule inner lobe with two setae …................................................................... 18
- Maxillule inner lobe with three setae ….................................................................. 20
18(17). Maxillule inner lobe with two setae and similar in length to outer lobe …........................................ 19
- Maxillule inner lobe with two setae and longer than outer lobe ….......... C. tanacredii Johnsson, Rocha & Boyko, 2002
19(18). Antennal exopod bearing a single terminal seta …................................ C. gracilioides Ummerkutty, 1961
- Antennal exopod bearing two terminal setae …......................................... C. phyllogorgius sp. nov.
20(17). Maxillule inner lobe with three setae and much longer than outer lobe …................. C. brevicaudatus (Brady, 1910)
- Maxillule inner lobe with three setae and similar in length to outer lobe …............... C. madeirensis Johnsson, 2001
21(14). Third exopodal segment of leg 1 with eight elements (III+5) …............................ C. proximus Nicholls, 1944
- Third exopodal segment of leg 1 with seven elements (III+4) …............................................... 22
22(21). Third endopodal segment of leg 1 with five setae …....................................... C. gracilis Wilson, 1932
- Third endopodal segment of leg 1 with six setae …......................................................... 23
23(22). Third exopodal segment of leg 2 with III-6; third endopodal segment of leg 2 with 1-5...... … C. tenuis (Giesbrecht, 1895)
- Third exopodal segment of leg 2 with IV-5; third endopodal segment of leg 2 with 1-1+I-3 …................................................................................................... C. orientalis Ummerkutty, 1961
24(11). Third exopodal segment of leg 1 with eight elements (III-5) …................................................ 25
- Third exopodal segment of leg 1 with seven elements (III-4) …............................................... 26
25(24). Maxillule outer lobe with three setae; antennal exopod with two setae …........................ C. ascidius Kim, 1996
- Maxillule outer lobe with two setae; antennal exopod with one seta …........................ C. similis Nicholls, 1944
26(24). Siphon reaching between insertion of maxilla and maxilliped …........................ C. capitalis (Giesbrecht, 1895)
- Siphon reaching insertion of leg 1 …............................................... C. thorelli (Giesbrecht, 1895)
description: Published as part of Farias, Amilcar, Neves, Elizabeth G. & Johnsson, Rodrigo, 2020, Two new species of Cryptopontius Giesbrecht, 1899 (Copepoda, Siphonostomatoida Artotrogidae) associated with invertebrates from Northeastern Brazil, pp. 481-494 in Zootaxa 4810 (3) on pages 492-493, DOI: 10.11646/zootaxa.4810.3.5, http://zenodo.org/record/3943951