TABLE 1. Caligid species recorded as adults free-swimming in plankton 1.
Group* Species Specimens Locality Source Notes
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*Abbreviations for species groups within Caligus: C.dia = C. diaphanus -group, C.mac = C. macarovi -group, C.pro = C. productus - group, C.pse = C.pseudorhombi -group, C.tri = C.trichiuri -group, C.und = C.undulatus group; N/A = not applicable; UA = unattributed (i.e. not yet placed in a species group).

1 A single male of Caligus tetrodontis Barnard, 1948 was reported from Brazilian plankton by Montú (1982) but this was considered a misidentification by Hayes et al. (2021) and is not included here.

N/A Anchicaligus nautili Stebbing, 1900 1 male 07⁰ 53’S, 116⁰ 18’E Heegaard, 1972 as Caligulina ocularis (see Dojiri & Ho, 2013)
C.mac Caligus aduncus Shen & Li, 1959 2 females Tsingtao Harbour (China) Shen & Li, 1959
C.pro Caligus affinis Heller, 1865 1 male Loanda Harbour (Gulf of Guinea) Scott, 1894 as C. bengoensis (see Hayes, et al., 2012)
UA Caligus calotomi Shiino, 1954 1 male Tokushima (Japan) Venmathi Maran etal., 2012a
C.und Caligus chelifer Wilson, 1905 1 male Gulf of Mexico Suárez-Morales et al., 1998
1 female 1 male Off Rockport, Texas (USA) Heegaard, 1966 as C. hyalinae (see Boxshall & Bernot, 2023)
UA Caligus chiastos Lin & Ho, 2003 1 male Gulf of Thailand Venmathi Maran et al., 2012b
C.pse Caligus chinglonglini Ohtsuka & Boxshall, 2019 1 male Iki Island (Japan) Ohtsuka & Boxshall, 2019
UA Caligus coryphaenae Steenstrup & Ļtken, 1861 4 males Nansei Islands (Japan) Venmathi Maran & Ohtsuka, 2008
1 male Loanda Harbour (Gulf of Guinea) Scott, 1894 as C. thymni (see Hayes, et al., 2012)
1 female unknown Wilson, 1905
1 male Easter Island (Chile) Wilson, 1905
1 male Mindanao (Philippines) Wilson, 1905
7 females 3 males Various stations in North Atlantic and Indian Oceans Heegaard, 1972 Material from Dana Expedition
C.dia Caligus costatus Shen & Li, 1959 2 males Tsingtao Harbour (China) Shen & Li, 1959 Recognised here as member of C. diaphanus group
UA Caligus curtus M̧ller, 1785 1 specimen Bermuda Wilson, 1936 Sex unspecified
UA Caligus dubius Scott, 1894 1 female 5 males Loanda Harbour (Gulf of Guinea) Scott, 1894 Redescribed by Boxshall & Gurney,1980
UA Caligus elongatus von Nordmann, 1832 females & males British coastal waters Todd et al., 1996 Common in coastal plankton samples
1 male Gulf of Mexico Wilson, 1950 as C. rapax
UA Caligus epidemicus Hewitt, 1971 multiple specimens Mitchel River (Australia) Hewitt, 1971
C.und Caligus evelynae Suárez-Morales, Camisotti & Martin, 2012 1 female 1 male Bay of Amuay (Venezuela) Suárez-Morales et al., 2012a
UA Caligus hyalinus Czerniavski, 1868 1 male Black Sea Czerniavski, 1868
UA Caligus ilhoikimi Suárez-Morales & Gasca, 2016 16 females 14 males Xcalak Reef (Mexico) Suárez-Morales & Gasca, 2016
C.und Caligus izmiriensis sp. nov. 3 females 2 males İzmir Bay (Türkiye) Present account
C.pse Caligus latigenitalis Shiino, 1954 1 male Seto Inland Sea (Japan) Venmathi Maran et al., 2012b
UA Caligus littoralis Luque & Cezar, 2000 13 females 5 males Western Caribbean (off Venezuela) Kim et al., 2019
C.mac Caligus longicaudatus Brady, 1899 1 male Port Chalmers (New Zealand) Brady, 1899
C.und Caligus longiramus Venmathi Maran,Ohtsuka & Jitchum, 2012 1 female Amami Island (Japan) Venmathi Maran et al., 2012b
C.mac Caligus macarovi Gusev, 1951 1 male California (USA) Heegaard, 1966
1 male San Francisco (USA) Heegaard, 1972 Material from Dana Expedition
UA Caligus minimus Otto, 1821 1 female Gulf of Iskenderun (Ţrkiye) Kamanli, 2023
C.und Caligus ogawai Venmathi Maran, Ohtsuka & Shang, 2012 2 females 1 male Seto Inland Sea (Japan) Hirado Island (Japan) Venmathi Maran et al., 2012a
C.mac Caligus orientalis Gusev, 1951 2 females 1 male Yellow River (China) Shen, 1957 as C. laticorpus
1 female 1 male Mankyong River (South Korea) Venmathi Maran & Ohtsuka, 2008
1 female 1 male Amoy (China) Ariake Sea (Japan) Venmathi Maran et al., 2012a
UA Caligus pelagicus Kurian, 1955 3 females 3 males Kayamkulam (India) Kurian, 1955
UA Caligus planktonis Pillai, 1979 1 female Off Trivandrum (India) Pillai, 1979
UA Caligus praetextus Bere, 1936 1 male Gulf of Cariaco (Venezuela) Kim et al., 2019
C.pro Caligus productus Dana, 1852 - 1853 1 female California (USA) Wilson, 1935
7 females 7 males Various stations in North Atlantic and Indian Oceans Heegaard, 1972 Material from Dana Expedition
C.mac Caligus punctatus Shiino, 1955 12 females 8 males China Shen, 1957 most from plankton, as C. communis
C.mac Caligus quadrigenitalis Venmathi Maran, Ohtsuka & Shang, 2012 1 female Iheya Island (Japan) Venmathi Maran et al., 2012a
UA Caligus rufimaculatus Wilson, 1905 1 female 4 males Laguna Chelem (Mexico) Suárez-Morales et al., 2012b
1 male Turpialito (Venezuela) Kim et al., 2019
C. tri Caligus rufus Wilson, 1908 3 females 1 male Laguna Chelem (Mexico) Suárez-Morales et al., 2012b as Metacaligus rufus
C.und Caligus sarosensis sp.nov. 1 female Gulf of Saros (Ţrkiye) Present account
UA Caligus savala Gnanamuthu, 1948 12 females 5 males Madras (India) Gnanamuthu, 1948
C.mac Caligus sclerotinosus Roubal, Armitage & Rohde, 1983 1 female Uwajima (Japan) Venmathi Maran & Ohtsuka, 2008
C.dia Caligus torpedinis Heller, 1866 1 male Fujian Province (China) Venmathi Maran et al., 2012a as C. rotundigenitalis (see Boxshall & Bernot, 2023)
C.tri Caligus trichiuri Krøyer, 1863 1 female Osaka Port (Japan) Venmathi Maran et al., 2012a as Metacaligus uruguayensis
C.und Caligus tripedalis Heegaard, 1972 2 females 1 male New Zealand Heegaard, 1972
C.und Caligus undulatus Shen & Li, 1959 24 females 34 males Kiaochow Bay (China) Shen & Li, 1959
1 male Mandapam (India) Pillai, 1966
75 females Baiá de Paranaguá (Brazil) Montú, 1982 including ovigerous and non-ovigerous females
1 male Ariake Sea (Japan) Venmathi Maran & Ohtsuka, 2008
1 male Seomjin River (South Korea) Venmathi Maran & Ohtsuka, 2008
1 female Ube, Seto Inland Sea (Japan) Venmathi Maran & Ohtsuka, 2008
2 males Laguna Chelem (Mexico) Suárez-Morales et al., 2012b
1 male Bonny River delta (Nigeria) Heegaard, 1955 as C. hamatus, see Boxshall & Bernot,2023
2 females 1 male Takamatsu Port (Japan) Venmathi Maran et al., 2012a
5 females 4 males Southern & southwestern coast of South Korea Moon & Park, 2019
C.und Caligus yucatanensis (Suárez-Morales, Kim & Escamilla, 2012) 1 female 2 males Laguna Chelem (Mexico) Suárez-Morales et al., 2012b as M. yucatanensis
N/A Lepeophtheirus alvaroi Suárez-Morales & Gasca, 2012 2 females Bahia Wafer (Costa Rica) Suárez-Morales & Gasca, 2012
N/A Lepeophtheirus parviventris Wilson, 1905 1 female Bering Sea Venmathi Maran et al., 2012a
N/A Lepeophtheirus semicossyphi Yamaguti, 1939 1 female Iheya Island (Japan) Wilson, 1905