Janiralata Menzies 1951
Creators: name: Kim, Sung Hoon
name: Kim, Jong Guk
name: Yoon, Seong Myeong
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Janiridae
Janiralata

description: Key to known species of the genus Janiralata in the Northwest Pacific
1. Exopod of pleopod III without plumose setae............................................................... 2
- Exopod of pleopod III with plumose setae.........................................................19 (group D)
2. Pleotelson with either posterolateral points or concavity distally................................................ 3
- Pleotelson without both posterolateral points and concavity distally.................................... 15 (group A)
3. Pleotelson with posterolateral points distally........................................................ 4 (group C)
- Pleotelson without posterolateral points........................................................... 11 (group B)
4. Cephalothorax with a pair of anterolateral projections or none.................................................. 5
- Cephalothorax with 2 pairs of anterolateral projections....................................................... 10
5. Anterolateral projections on cephalothorax absent...................................... J. intermedia Mezhov, 1981
- Anterolateral projections on cephalothorax present........................................................... 6
6. Anterolateral projections on cephalothorax indistinct.................................... J. sarsi (Richardson, 1905)
- Anterolateral projections on cephalothorax distinct........................................................... 7
7. Anterolateral projections on cephalothorax blunt distally.................................. J. bifurcata Mezhov, 1981
- Anterolateral projections on cephalothorax not blunt distally................................................... 8
8. Cephalothorax with distinct rostrum................................................. J. bisinuata Kussakin, 1972
- Cephalothorax with indistinct and reduced rostrum........................................................... 9
9. Pleotelson concave distally; posterolateral points of pleotelson over distal end of medial lobe of pleotelson............................................................................................... J. pilosa Kussakin, 1962
- Pleotelson convex distally; posterolateral points of pleotelson not reaching distal end of medial lobe of pleotelson..................................................................................... J. occidentalis (Walker, 1898)
10. Anterolateral projections on cephalothorax bifid distally; pleotelson shallowly serrated on lateral margin....................................................................................... J. bilobata Kussakin & Mezhov, 1979
- Anterolateral projections on cephalothorax not bifid distally; pleotelson lateral margin deeply serrated..................................................................................... J. problematica Kussakin & Mezhov, 1979
11. Rostrum in cephalothorax present....................................................................... 12
- Rostrum in cephalothorax absent or reduced............................................................... 14
12. Rostrum not exceeding anterolateral projections.......................................... J. vitjazi Kussakin, 1962
- Rostrum exceeding anterolateral projections............................................................... 13
13. Rostrum long, almost half length of cephalothorax....................................... J. tricornis (Krøyer, 1847)
- Rostrum relatively short, one-third of cephalothorax.................................... J. kurilensis Kussakin, 1962
14. Anterior margin of cephalothorax slightly pointed in the middle; pleopod II in females convex distally.............................................................................................. J. erostrata (Richardson, 1899)
- Anterior margin of cephalothorax rounded in the middle; pleopod II in females concave distally.................................................................................................... J. soldatovi (Gurjanova, 1933)
15. Anterolateral projections in cephalothorax present and distinct...................... J. sagamiensis (Shimomura, 2006)
- Anterolateral projections in cephalothorax absent or reduced.................................................. 16
16. Anterolateral projections in cephalothorax reduced and indistinct.............................................. 17
- Anterolateral projections in cephalothorax absent........................................................... 18
17. Anterior margin of cephalothorax convex; pleopod Ⅰ of males without distomedial lobes.......... J. modesta Mezhov, 1981
- Anterior margin of cephalothorax not convex; pleopod Ⅰ of males with distomedial lobes.......... J. koreanesis Jang, 1991
18. Anterolateral margin of cephalothorax angled; eyes small and its length less than half of cephalothorax........................................................................................... J. microphthalma Kussakin, 1972
- Anterolateral margin of cephalothorax rounded; eyes relatively large and its length over half of cephalothorax.......................................................................................... J. obliterata Kussakin, 1972
19. Cephalothorax with prominent rostrum................................................................... 20
- Cephalothorax without rostrum......................................................................... 22
20. Rostrum with blunt or round distally....................................... J. aberrantis Kussakin & Mezhov, 1979
- Rostrum with acute tip distally.......................................................................... 21
21. Anterolateral projections of cephalothorax expanding forwardly; posterolateral points of pleotelson reaching distal end of pleotelson.................................................................. J. rhacuraeformis Birstein, 1963
- Anterolateral projections of cephalothorax expanding diagonally; posterolateral point of pleotelson expanding beyond distal end of pleotelson................................................................ J. hexadentata Birstein, 1970
22. Lateral margins of cephalothorax and pleotelson serrated.................................... J. serrata Birstein, 1963
- Lateral margins of cephalothorax and pleotelson smooth..................................................... 23
23. Pleotelson with posterolateral points; distal region of pleotelson concave........................................ 24
- Pleotelson without posterolateral points; distal region of pleotelson rounded and convex............................ 25
24. Anterolateral projections of cephalothorax long and acute distally; its length half of cephalothorax.................................................................................................. J. gurjanovae Kussakin, 1962
- Anterolateral projections short and subacute distally; its length a quarter of cephalothorax...... J. ochotensis Kussakin, 1962
25. Pereonites 2 and 3 deeply bilobed; coxal plates of pereonites 2‒4 invisible dorsally; pleotelson not truncated distally..... 26
- Pereonites 2 and 3 not deeply bilobed; coxal plates of pereonites 2‒4 visible dorsally; pleotelson truncated distally.............................................................................................. J. truncata sp. nov.
26. Carpus of pereopod Ⅰ with 6 robust inferior setae; pleopod II of females concave distally; exopod of pleopod III with 11 plumose distal setae.................................................................... J. chuni (Thielemann, 1910)
- Carpus of pereopod Ⅰ with 8 robust inferior setae; pleopod II of females convex distally; exopod of pleopod III with 16 plumose distal setae....................................................................... J. shiinoi Kussakin, 1962
description: Published as part of Kim, Sung Hoon, Kim, Jong Guk & Yoon, Seong Myeong, 2022, Description of two new janirid isopods (Isopoda, Asellota, Janiridae) from Korean waters, pp. 532-546 in Zootaxa 5178 (6) on pages 544-545, DOI: 10.11646/zootaxa.5178.6.2, http://zenodo.org/record/7037372