新成人のみなさな。おめでとうございます。
こんな時代ではありますが、みなさまにとって良い日本でありますよう、心からご期待いたします。
ジュニアも今年成人式でした。こちらは延期となっていまいましたが、、、
図はまったく無関係です。知人の研究者Saitoさんが新種記載研究10周年ということで、研究歴ハーフ成人式とのことです（笑）。
--------------- [2021.1.14加筆] ---------------
コエビノハラヤドリ亜科Hemiarthrinaeの情報をまとめました。
平成26年（7年前）に調べたときは56種だったので、8種（1.1新種/年）が記載されたようです。
宿主はWoRMSで調べたので、抜けもあるかと思います。なんか、Nob!!がモエビ科と思っていたものが、いくつかに分けられているようです。
Subfamily Hemiarthrinae Markham, 1972（出典：WoRMS, 2021.1.11）
Allodiplophryxus Markham, 1985属・2種
1 Allodiplophryxus floridanus Markham, 1985
Host: Urocaris longicaudata Stimpson, 1860 [Palaemonidae ]
2 Allodiplophryxus unilateralis An, Chen & Paulay, 2020
Host: Jocaste lucina (Nobili, 1901) [Palaemonidae ]
Anchiarthrus Markham, 1992属・1種
3 Anchiarthrus derelictus Markham, 1992
Host: Arete dorsalis Stimpson, 1860 [Alpheidae ]
Anisarthrus Giard, 1907属・2種
4 Anisarthrus okunoi Saito & Shimomura, 2015
Host: Rhynchocinetes uritai Kubo, 1942 [Rhynchocinetidae ]
5 Anisarthrus pelseneeri Giard, 1907
Host: Athanas nitescens (Leach, 1814) [Alpheidae ]
Anomophryxus Shiino, 1937属・1種
6 Anomophryxus deformatus Shiino, 1937
Host: Plesionika ortmanni Doflein, 1902 [Pandalidae ]
Apophrixus Nierstrasz & Brender a Brandis, 1931属・2種
7 Apophrixus constrictus Markham, 1982
Host: Alpheus Fabricius, 1798 [Alpheidae ]
8 Apophrixus philippinensis Nierstrasz & Brender à Brandis, 1931
Host: - [-]
Azygopleon Markham, 1985属・1種
9 Azygopleon schmitti (Pearse, 1932)
Host: Synalpheus brooksi Coutière, 1909 [Alpheidae]
Cataphryxus Shiino, 1936属・1種
10 Cataphryxus primus (Shiino, 1934)
Host: Lysmata Risso, 1816 [Lysmatidae ]
Dicropleon Markham, 1972属・4種
11 Dicropleon bifidus (Bourdon, 1967)
Host: Actinimenes inornatus (Kemp, 1922) [Palaemonidae ]
12 Dicropleon morator Markham, 1982
Host: Cristimenes commensalis (Borradaile, 1915) [Palaemonidae ]
13 Dicropleon periclimenis Markham, 1972
Host: Cuapetes americanus (Kingsley, 1878) [Palaemonidae ]
14 Dicropleon processae Markham, 1980
Host: Processa aequimana (Paulson, 1875) [Processidae ]
Diplophryxus Richardson, 1904属・8種
15 Diplophryxus alphei Shiino, 1934
Host: Alpheus Fabricius, 1798 [Alpheidae ]
16 Diplophryxus alveolatus Bourdon, 1981
Host: Alpheus Fabricius, 1798 [Alpheidae ]
17 Diplophryxus gargantua Boyko, 2012
Host: Alpheus inca Wicksten & Méndez G., 1981 [Alpheidae ]
18 Diplophryxus gracilis Markham, 1989
Host: Urocaridella urocaridella (Holthuis, 1950) [Palaemonidae ]
19 Diplophryxus jordani Richardson, 1904
Host: Palaemon serrifer (Stimpson, 1860) [Palaemonidae ]
20 Diplophryxus kempi Chopra, 1930
Host: Gnathophyllum americanum Guérin-Méneville, 1855 [Palaemonidae ]
21 Diplophryxus negrimaculatus Markham, 2010
Host: Phycomenes zostericola Bruce, 2008 [Palaemonidae ]
22 Diplophryxus siankaanensis Markham, 1988
Host: Alpheus formosus Gibbes, 1850 [Alpheidae ]
Eophrixus Caroli, 1930属・13種
23 Eophrixus adriaticus (Nierstrasz & Brender à Brandis, 1931)
Host: Hippolytidae Spence Bate, 1888 [Hippolytidae ]
24 Eophrixus brevicauda (Chopra, 1923)
Host: Synalpheus tumidomanus (Paulson, 1875) [Alpheidae ]
25 Eophrixus caudatus An, Boyko & Li, 2015
Host: Alpheus microstylus (Spence Bate, 1888) [Alpheidae ]
26 Eophrixus enchophyllus Caroli, 1930
Host: Alpheus dentipes Guérin, 1832 [Alpheidae ]
27 Eophrixus kuboi (Shiino, 1939)
Host: Cuapetes akiensis (Kubo, 1936) [Palaemonidae ]
28 Eophrixus laevimanus Caroli, 1930
Host: Synalpheus gambarelloides (Nardo, 1847) [Alpheidae ]
29 Eophrixus leptochelae (Pillai, 1966)
Host: Leptochela aculeocaudata Paulson, 1875 [Pasiphaeidae ]
30 Eophrixus lysmatae Caroli, 1930
Host: Lysmata seticaudata (Risso, 1816) [Lysmatidae ]
31 Eophrixus nigrocinctus (Chopra, 1923)
Host: Cuapetes elegans (Paulson, 1875) [Palaemonidae ]
32 Eophrixus pikei (Bruce, 1968)
Host: Ischnopontonia lophos (Barnard, 1962) [Palaemonidae ]
33 Eophrixus shojii Shiino, 1941
Host: Alpheus japonicus Miers, 1879 [Alpheidae ]
34 Eophrixus subcaudalis (Hay, 1917)
Host: Synalpheus longicarpus (Herrick, 1891) [Alpheidae ]
35 Eophrixus yusakiensis (Shiino, 1934)
Host: Alpheus Fabricius, 1798 [Alpheidae ]
Epiphrixus Nierstraz & Brender a Brandis, 1932属・1種
36 Epiphrixus adriaticus Nierstrasz & Brender à Brandis, 1932
Host: Synalpheus gambarelloides (Nardo, 1847) [Alpheidae ]
Eriphrixus Markham, 1990属・1種
37 Eriphrixus obesus Markham, 1990
Host: Periclimenes vaubani Bruce, 1990 [Palaemonidae ]
Filophryxus Bruce, 1972属・1種
38 Filophryxus dorsalis Bruce, 1972
Host: Echinopericlimenes hertwigi (Balss, 1913) [Palaemonidae ]
Hemiarthrus Giard & Bonnier, 1887属・5種
39 Hemiarthrus abdominalis (Krøyer, 1840)
Host: Eualus gaimardii (H. Milne Edwards, 1837) [Thoridae ]
40 Hemiarthrus alphei An, Chen & Paulay, 2020
Host: Alpheus crinitus Dana, 1852 [Alpheidae ]
41 Hemiarthrus nematocarcini Stebbing, 1914
Host: Nematocarcinus lanceopes Spence Bate, 1888 [Nematocarcinidae ]
42 Hemiarthrus surculus Boyko & Williams, 2004
Host: Alpheus simus Guérin-Méneville, 1855 [Alpheidae ]
43 Hemiarthrus synalphei (Pearse, 1950)
Host: Synalpheus fritzmuelleri Coutière, 1909 [Alpheidae ]
Hemiphryxus Bruce, 1978属・1種
44 Hemiphryxus malindiae (Bruce, 1974)
Host: Coralliocaris superba (Dana, 1852) [Palaemonidae ]
Hyperphrixus Nierstrasz & Brender a Brandis, 1931属・3種
45 Hyperphrixus castrensis Markham, 1985
Host: Periclimenes perryae Chace, 1942 [Palaemonidae ]
46 Hyperphrixus filiformis (Chopra, 1923)
Host: Alpheus paralcyone Coutière, 1905 [Alpheidae ]
47 Hyperphrixus tattersalli Nierstrasz & Brender à Brandis, 1931
Host: Palaemonidae Rafinesque, 1815 [Palaemonidae ]
Hypohyperphrixus Nierstrasz & Brender a Brandis, 1932属・1種
48 Hypohyperphrixus latilamellaris Nierstrasz & Brender à Brandis, 1932
Host: Synalpheus triunguiculatus (Paulson, 1875) [Alpheidae ]
Izuohshimaphryxus Saito, 2015属・1種
49 Izuohshimaphryxus hoshinoi Saito, 2015
Host: Ancylomenes speciosus (Okuno, 2004) [Palaemonidae ]
Loki Markham, 1972属・2種
50 Loki athanus An, Chen & Paulay, 2020
Host: Athanas parvus de Man, 1910 [Alpheidae ]
51 Loki circumsaltanus Markham, 1972
Host: Thor floridanus Kingsley, 1878 [Thoridae ]
Mediophrixus Markham, 1990属・1種
52 Mediophrixus pinuum Markham, 1990
Host: Athanas Leach, 1814 [Alpheidae ]
Mesophryxus Bruce, 1973属・1種
53 Mesophryxus ventralis Bruce, 1973
Host: Harpiliopsis beaupresii (Audouin, 1826) [Palaemonidae ]
Metaphrixus Nierstrasz & Brender a Brandis, 1931属・4種
54 Metaphrixus carolii Nierstrasz & Brender à Brandis, 1931
Host: - [-]
55 Metaphrixus intutus Bruce, 1966
Host: Palaemonella rotumana (Borradaile, 1898) [Palaemonidae ]
56 Metaphrixus rastriferis Markham, 1990
Host: Periclimenaeus rastrifer Bruce, 1980 [Palaemonidae ]
57 Metaphrixus setouchiensis Shimomura, Ohtsuka & Sakakihara, 2006
Host: Hippolyte Leach, 1814 [Hippolytidae ]
Micropodiphryxus Boyko, 2012属・1種
58 Micropodiphryxus richardsonae (Chopra, 1930)
Host: Philocheras lowisi (Kemp, 1916) [Crangonidae ]
Miophrixus Barnard, 1955属・1種
59 Miophrixus latreutidis Barnard, 1955
Host: Latreutes pymoeus Nobili, 1904 [Hippolytidae ]
Neophryxus Bruce, 2007属・1種
60 Neophryxus globicaudatus (Bruce, 1973)
Host: Coralliocaris graminea (Dana, 1852) [Palaemonidae ]
Orophryxus Bruce, 1972属・1種
61 Orophryxus shiinoi Bruce, 1972
Host: Cuapetes grandis (Stimpson, 1860) [Palaemonidae ]
Pliophrixus Caroli, 1930属・1種
62 Pliophrixus philonika Caroli, 1930
Host: Processa edulis (Risso, 1816); Processa canaliculata Leach, 1815 [Processidae ]
Quadripediphryxus Saito, 2020属・1種
63 Quadripediphryxus mayuzumii Saito, 2020
Host: Synalpheus streptodactylus Coutière, 1905 [Alpheidae ]
Sigyn An, Boyko & Li, 2015属・1種
64 Sigyn branchialis An, Boyko & Li, 2015
Host: Alpheus digitalis De Haan, 1844 [Alpheidae ]
＜出典＞
Boyko, C.B.; Bruce, N.L.; Hadfield, K.A.; Merrin, K.L.; Ota, Y.; Poore, G.C.B.; Taiti, S.; Schotte, M.; Wilson, G.D.F. (Eds) (2008 onwards). World Marine, Freshwater and Terrestrial Isopod Crustaceans database. Hemiarthrinae Markham, 1972. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=589331 on 2021-01-14
