Hemiarthrinae Markham 1972
Creators: name: An, Jianmei
name: Chen, Ruru
name: Paulay, Gustav
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Bopyridae

description: Key to 28 genera of subfamily Hemiarthrinae Markham, 1972 (based on females)   1 Pleon without appendages.......................................................... Orophryxus Bruce, 1972a   
- Pleon with appendages................................................................................. 2  
2 Pleon without lateral plates............................................................................. 3  
- Pleon with lateral plates................................................................................ 7  
 3 With sucker-like organ on the dorsum of the cephalon..................................... Neophryxus Bruce, 2007   
- Without sucker-like organ on the dorsum of the cephalon...................................................... 4  
 4 Pereomere 1–6 with elongated, filiform coxal plates...................................... Filophryxus Bruce, 1972b   
- Pereomeres without any coxal plates...................................................................... 5  
5 With four pairs of biramous pleopods..................................................................... 6  
 - With four pairs of uniramous pleopods.............................................. Anomophryxus Shiino, 1937   
 6 With globose uropods............................................ Epiphrixus Nierstraz & Brender à Brandis, 1932   
 - Without uropods.................................................................. Hemiphryxus Bruce, 1978   
7 With biramous lateral plates............................................................................. 8  
- With uniramous lateral plates........................................................................... 11  
 8 With two pereopods on convex side of the body................................... Allodiplophryxus Markham, 1985   
- With more than two pereopods on convex side of the body..................................................... 9  
 9 With seven pereopods on convex side of the body........................................ Cataphryxus Shiino, 1936   
- With three or four pereopods on convex side of the body..................................................... 10  
 10 With three pereopods on convex side of the body.................................... Diplophryxus Richardson, 1904   
 - With four pereopods on convex side of the body..................................... Micropodiphryxus Boyko, 2012   
 11 Pereon with prominent coxal plates............................................... Izuohshimaphryxus Saito, 2015   
- Pereon without coxal plates............................................................................ 12  
12 With seven pereopods on convex side of the body........................................................... 13  
- With fewer than seven pereopods on convex side of the body.................................................. 16  
 13 Pleon with four segments......................................... Apophrixus Nierstraz & Brender à Brandis, 1931   
- Pleon with five segments.............................................................................. 14  
 14 With four pairs of biramous pleopods................................................... Eophrixus Caroli, 1930   
- Without biramous pleopods............................................................................ 15  
 15 With four pairs of uniramous pleopods.............................................. Sigyn An, Boyko & Li, 2015   
 - With three pairs of uniramous pleopods.................................................... Loki Markham, 1972   
16 With four pereopods on convex side of the body............................................................ 17  
- With fewer than four pereopods on convex side of the body................................................... 19  
 17 With three pairs of uniramous pleopods, without uropods.................................. Mesophryxus Bruce, 1973   
- With four pairs of uniramous pleopods, with uropods........................................................ 18  
 18. Pleon with five segments.......................................................... Eriphrixus Markham, 1990   
 - Pleon with four segments............................................................ Pliophrixus Caroli, 1930   
19 With three pereopods on convex side of the body........................................................... 20  
- With fewer than three pereopods on convex side of the body.................................................. 21  
 20 Second oostegite on long side arching over to dorsal surface............................ Mediophrixus Markham, 1990   
 - Second oostegite on long side not arching over to dorsal surface........................... Dicropleon Markham, 1972   
21 With two pereopods on convex side of the body............................................................ 22  
- With one pereopod on convex side of the body............................................................. 26  
22 Pleon with five pleomeres............................................................................. 23  
- Pleon with three pleomeres............................................................................ 25  
23 With four pairs of uniramous pleopods................................................................... 24  
 - With four pairs of biramous pleopods............................. Hyperphrixus Nierstraz & Brender à Brandis, 1931   
 24 Attached dorsolaterally on host, pleomeres distinct dorsally............. Metaphrixus Nierstraz & Brender à Brandis, 1931   
 - Attached ventrally on host, pleomeres fused dorsally....................................... Anisarthrus Giard, 1907   
 25 With three pairs of uniramous pleopods, plus uropods.................................... Miophrixus Barnard, 1955   
 - With three pairs of biramous pleopods, without uropods................................ Anchiarthrus Markham, 1992   
 26 With three pairs of biramous pleopods, plus uropods............. Hypohyperphrixus Nierstraz & Brender à Brandis, 1932 - With four pairs of uniramous pleopods, without uropods..................................................... 27   
 27 Pleon of five segments, with lateral plates of same size........................... Hemiarthrus Giard & Bonnier, 1887   
 - Pleon of four segments, with lateral plates of first three pleomeres small, but very large on fourth..................................................................................................... Azygopleon Markham, 1985
description: Published as part of An, Jianmei, Chen, Ruru & Paulay, Gustav, 2020, Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae Hemiarthrinae) from the Indo-West Pacific, pp. 264-274 in Zootaxa 4845 (2) on pages 265-266, DOI: 10.11646/zootaxa.4845.2.7, http://zenodo.org/record/4406601