Gyge branchialis Cornalia & Panceri, 1861: 90 –111, pls. 1, 2 (type locality: “della magica laguna su cui sorge Venezia, non lungi dall'isola di S. Giorgio”, Italy, infesting Gebia littoralis = U. pusilla).— Hesse, 1861: 102 (mention).— Heller, 1866: 749 (list).—Bate & Westwood, 1867: 228–229 (comparison with Gyge galatheae Bate & Westwood, 1867).— Nardo, 1868: 251, 268, 316 (mention).— Norman, 1869: 262 (list).— Fraisse, 1877: 52 (mention).— Stalio, 1877: 241 (list).— Fraisse, 1878a: 290 (mention).— Fraisse, 1878b: 396, 405, 412, 423 (mention).— Stossich, 1880: 229 (list).— Kossmann, 1881a: 653 (mention), pl. 22, figs. 12, 13, 20, 22, 26.— Walz, 1881: 159, 160, 164 (mention).— Walz, 1882: 127, 128, 132, 142–147, 149, 156, 158, 162–164, 167, 172, 176, 189, 190, pl. 2, figs. 9–12, 14, 16, 17, pl. 3, figs. 18, 23B, 24, pl. 4, figs. 29, 30, 32, 33 (Trieste, infesting Gebia litoralis [sic] = U. pusilla).— Carus, 1885: 452 (list).— Norman, 1886: 13 (list).— Giard, 1887: 1113, 1115 (mention).— Giard & Bonnier, 1887a: 18, 26, 36, 43, 62, 176 (mention).— Groult, 1887: 164 (list).—Giard, 1888: 24, 29 (mention).— Giard & Bonnier, 1888a: 305 (mention).— Giard & Bonnier, 1888b: 63 (mention).—Giard, 1889: 169–170 (mention).— Giard & Bonnier, 1889: 259 (mention).— Giard & Bonnier, 1890b: 377 (mention), 384 (list).— Ide, 1892: 100, 148, 150 (study of digestive tract).— Perrier, 1893: 1021 (list).— Stebbing, 1893: 412 (list).— Giard, 1896: 96, 249 (mention).— Bonnier, 1900: 353 –356, pl. 34, figs. 1–11 (France, infesting Upogebia stellata (Montagu, 1808)).— Richard, 1900: 71 (list).— Bohn, 1901: 325 –326, 331 (France, infesting U. stellata).— Gerstaeker & Ortmann, 1901: 184, 256 (list), pl. 10, figs. 1–11.— Giard, 1905: 12 (France, infesting U. stellata, Gebia deltura Leach, 1816 = Upogebia delatura (Leach, 1916)).— Norman, 1905a: 17 (list; synonymy with G. galatheae).— Norman, 1905b: 86 (as senior synonym of G. galatheae).— Tattersall, 1905: 86 (list).— Nobili, 1906: 1112 (mention).— Norman, 1907: 363 (list).— Lo Giudice, 1908: 50 –80, pl. 3, figs. 2–8 (study of leg morphology).— Calman, 1909: 203, fig. 124 (figure of male and female, after Cornalia & Panceri, 1861).— Lister, 1909: 485, fig. 299 (figure of male and female after Cornalia & Panceri, 1861).— Lo Bianco, 1909: 594, 607 (list).— Chopra, 1923: 481 (mention).— Caroli, 1929a: 490 – 492 (effects on host, U. littoralis = U. pusilla).— Popov, 1929: 6, 10, 11, 13, 24 (Bay of Sevatopol, infesting Gebia littoralis = U. pusilla).— Tucker, 1929: 985 (mention).— Tucker, 1930: 4 –14, 108 (Naples, infesting U. littoralis = U. pusilla; effects on host).— Mouchet, 1931a: 172 (mention).— Tattersall, 1931: 187 (list).— Atkins, 1933: 324, 325 (mention).— Hiraiwa & Sato, 1939: 118 (mention).— Callan, 1940: 168 (mention).— Hughes, 1940: 331 –336 (Naples, effects of U. littoralis = U. pusilla).— Larwood, 1940: 50 -51 (West Port, Egypt, infesting U. litoralis [sic] = U. pusilla), fig. 17 (locality map).— Reverberi, 1942a: 58 (mention).— Reverberi, 1943a: 38 –41 (effects on U. littoralis = U. pusilla).— Carayon, 1944: 238 –243, fig. 2A (comparison with Gyge arcassonensis Carayon, 1944).— Veillet, 1945: 287, 296, 297, 323 (mention).— Caroli, 1946: 62 (mention).— Reinhard et al., 1947: 69 –70 (mention).— Reverberi, 1947b: 85 – 87, 90, 91, fig. 8 (Naples, infesting U. littoralis = U. pusilla).— Morris, 1948: 6 –7 (mention).— Stephensen, 1948: 116 – 117, fig. 34 (Denmark, infesting U. stellata).— Baffoni, 1950: 215 (mention).— Caullery, 1952: 204 (mention).— Von Brand, 1952: 256 (mention).— Caroli, 1953: 86 –87 (mention).— Pike, 1953: 234 (United Kingdom, infesting U. deltaura).— Attardo, 1955: 134, 136 (mention).— Reinhard, 1956: 90 (mention).— Oguro, 1957: 32 (mention).— Spooner, 1957: 205 (list).— Florkin, 1960: 405 (mention).— Codreanu, 1961: 139 –140 (mention).— Holme, 1961: 453 (list).— Bourdon, 1963: 429 (France, infesting U. deltaura).— Codreanu & Codreanu, 1963: 283 –284 (mention).— Danforth, 1963a: 8 (list).— Reverberi & Catalano, 1963: 128 –133, 138, 139 (Naples, as host of Paracabirops marsupialis Caroli, 1953 = Cabirops marsupialis (Caroli, 1953)).— Tuzet et al., 1960: 505 (mention).— Houša, 1963: 107 (mention).— Bourdon, 1964: 4, 5 (Bay of Arcachon, France, infesting U. pusilla).— Catalano & Restivo, 1965: 204 (list).— Nielsen & Strömberg, 1965: 57 (mention).— Holme, 1966: 475 (list), 490 (distribution map).— Von Brand, 1966: 222 (mention based on data from Hughes, 1940).— Bourdon, 1967a: 283, 285 (France, infesting U. stellata).— Bourdon, 1967b: 847, 848 (mention).— Bourdon, 1968: 147, 151–159, 169, 322, 352, 410, 422 figs. 28–32, tables, 23, 24 (redescription, review of distribution from United Kingdom to France, Mediterranean, Adriatic, Black Sea, infesting U. deltaura, U. pusilla, U. stellata).— Restivo, 1968: 506 (Naples, infesting U. littoralis = U. pusilla).— Beklemishev, 1969: 353, fig. 152D (after Carus, 1885).— Sadoğlu, 1969: 173 –197, 199, 201–203, 206–208, figs. 1–16, 22, 23A (study of pigmentation).— Danforth, 1970b: 3 (mention).— Kuris, 1971: 347 (mention).— Restivo, 1971: 71 (list).— Strömberg, 1971: 4, 29 (mention).— Naylor, 1972: 69, 70, 73, fig. 23H, I (summary of British records).— Kuris, 1974 (137 (mention).— Baudoin, 1975: 344 (mention).— Restivo, 1975: 152, 153, 161–163, table 1 (Gulf of Naples, infesting U. pusilla; hyperparasitized by Paracabirops marupialis = Cabirops marsupialis).— Beck, 1980a: 150, 152 (mention).— Beck, 1980b: 9 (mention).— Bourdon et al., 1981: 497 (mention).— Abu-Hakima, 1984: 59 (mention).— O’Brien & Van Wyk, 1985: 197 (mention).— Page, 1985: 196 (mention)— Dworschak, 1988: 68, 69, 74 (Adriatic Sea, infesting U. pusilla).— Markham, 1988: 17 (mention).— Müller, 1989: 44, 45, fig. 7 (mention, illustration of ventral head of male).— Anderson, 1990: 290 (mention).— Isaac et al., 1990: 402 –404, fig. 9.15 (morphological characters, review of British records).— Janssen & Brandt, 1994: 12 (mention).— Sassaman, 1992: 579 (mention).— Rowden & Jones, 1994: 633 (mention).— Hayward et al., 1995: 358 –359, fig. 8.25 (morphological characters, summary of British records).— Astall et al., 1996: 821 –823, table 1 (Clyde Sea, Scotland; Irish Sea; Arcachon Basin, France, infesting U. deltaura, U. pusilla, U. stellata).— Trilles, 1999: 305, 332 (mention).— Mariappan et al., 2000: 305 (mention).— Markham, 2001: 197 (mention), 198, 200, 201 (lists).— Van der Land, 2001: 322 (list).— Junoy & Castelló, 2003: 303 (list).— Ngoc-Ho, 2003: 528 (mention).— Markham, 2004: 193 –195, 197 (Adriatic Sea, infesting U. pusilla and U. tipica (Nardo, 1868)).— Le Mao, 2006: 23, 26 (list).—Román- Contreras, 2008b: 91 (mention).— Smith et al., 2008: 231 (mention).—An et al., 2009: 231 (mention).— Dumbauld et al., 2011: 344 (mention).— Tempelman et al., 2013: 17, 21, 23, figs. 8, 9 (North Sea, infesting U. deltaura and U. stellata).— Ubaldo et al., 2014: 558, 561 (mention).— Pascal et al., 2016: 195 (Arcachon Bay, France, infesting U. pusilla).— Asson et al., 2017: 222 (mention).— Dairain et al., 2017: 203 (Arcachon Bay, infesting U. pusilla).— Romero-Rodríguez et al., 2017: 92 (mention).
Gyges [sic] branchialis — Grube, 1864: 77 [Adriatic Sea, infesting Gebia litoralis [sic] = U. pusilla].— Nardo, 1868: 263 (list).— Van Beneden, 1876: 145 (mention).
Gyge branchiale—Hesse, 1865: 236 (mention).
Gyge galatheae Bate & Westwood, 1867: 225 –229, unnumbered figure (type locality: Guernsey, Channel Islands, United Kingdon, infesting “ Galathea squamifera Leach, 1814 ” subsequently reidentified as U. stellata by Norman, 1905b).— Giard & Bonnier, 1887a: 175 (list).— Stebbing, 1893: 412 (list).— Norman, 1886: 13 (list; in synonymy with G. branchialis without comment).— Giard & Bonnier, 1890b: 374 (mention).— Norman, 1905a: 17 (list; in synonymy with G. branchialis without comment).— Bonnier, 1900: 221, 356–357, 380, fig. 58 (review of data from Bate & Westwood, 1867).— Bohn, 1901: 331 (list).— Gerstaeker & Ortmann, 1901: 184, 254 (list).— Norman, 1905b: 86 (synonymy with G. branchialis; corrected identification of host).— Sinel, 1906: 223 (list).— Mouchet, 1931b: 504 (mention).— Pike: 1953: 234 –235 (list).— Danforth, 1963a: 8 (list).
Gyge Galatheae — Norman, 1869: 262 (list; in synonymy with G. branchialis without comment).— Giard & Bonnier, 1887b: 1309 (list).— Giard, 1896: 200 (mention).— Marine Biological Association, 1904: 245 (list).
Gyge [sp.] Parker & Haswell, 1921: 573, fig. 471.3 (figure after Gerstaeker & Ortmann, 1901).
Gige [sic] branchialis — Borcea, 1934: 405 (list).
Gyge galathea [sic]— Sadoğlu, 1969: 32 (mention).— Naylor, 1972: 73 (mention).
Gyge branchiatis [sic]— Owens & Glazebrook, 1985: 111 (mention).
Not Gyge branchialis — Pandey, 1990: 494–494, figs. 1, 2 (India, infesting Macrobrachium birmanicum choprai (Tiwari, 1949) = M. gangeticum Bate, 1868) (almost certainly a species of Probopyrus Giard & Bonnier, 1888).
Material examined. Italy: 2 ovigerous females (9.7–10.1 mm) not affiliated with any host, 1 ovigerous female (9.3 mm), 1 mature male (3.3 mm), ex right branchial chamber of female Upogebia stellata (14.3 mm CL), Naples Aquarium, coll. unknown, 17 Nov 1890 (NMV J71549).
Distribution. Denmark, United Kingdom, France, Spain, Portugal, Italy, Algeria, Croatia, Romania, and Russia.
Hosts. Upogebia deltaura (Leach, 1816), U. pusilla (Petagna, 1792) (type host), U. stellata (Montagu, 1808), and U. tipica (Nardo, 1869).
Remarks. Although old, these specimens are exceptionally well-preserved and match prior descriptions (e.g., Bourdon 1968).