Bathygyge grandis Hansen, 1897

An, Jianmei, Boyko, Christopher B. & Li, Xinzheng, 2015, A Review Of Bopyrids (Crustacea: Isopoda: Bopyridae) Parasitic On Caridean Shrimps (Crustacea: Decapoda: Caridea) From China, Bulletin of the American Museum of Natural History 2015 (399), pp. 1-85 : 29-31

Bathygyge grandis Hansen, 1897 Figure 6

Bopyrus Faxon, 1895: 140 [material described by Hansen, 1897].

Bathygyge grandis Hansen, 1897: 122–124 , pl. 6, fig. 2 [off Nayarit, Mexico, infesting Glyphocrangon spinulosa Faxon, 1893 ]; Richardson, 1899a: 869; Richardson, 1899b: 338; Richard, 1900: 71; Bonnier, 1900: 8, 48, 221, 291–292, 381, text fig. 53; Richardson, 1905b: xx, xlvi, 537–539, 720, fig. 581; Stebbing, 1908: 38, 57–59, 94, pl. 7 (33) [ South Africa, infesting Glyphocrangon sculpta (Smith, 1882) ]; Stebbing, 1910a: 436, pl. 7 [ South Africa, infesting G. sculpta ]; Nierstrasz and Brender à Brandis, 1923: 86; Barnard, 1940: 494; Danforth, 1963: 33, 37, 91, 92, pl. 5, figs. 1–2; Sadoğlu, 1969: 197; Schultz, 1969: 312, fig. 496; Danforth, 1970: 9, 43, 57–58, 149, fig. 5d, e; Holthuis, 1971: 285; Wenner, 1978: 1058 [Middle Atlantic Bight, infesting G. sculpta and Glyphocrangon longirostris (Smith, 1882) ]; Bourdon, 1979c: 510; Markham, 1979: 771–772; Markham 1985a: 19–20, 131 [Virginia, infesting G. sculpta and G. longirostris ]; Markham, 1986: 155–156, fig. 4B; Markham, 1988: 57; Kaufmann et al., 1989: 1882 [Magellan Rise, NE Pacific, infesting Glyphocrangon vicaria Faxon, 1896 (the only Glyphocrangon listed)]; Salazar-Vallejo and Leija-Tristán, 1990: 429; Leija-Tristán and Salazar-Vallejo, 1991: 1; Markham, 1992b: 3; Espinosa-Pérez and Hendrickx, 2001: 50; Román-Contreras and Soto, 2002: 379; An, 2006: 67–68, fig. 28; An et al., 2007a: 1002–1003, fig. 1 [East China Sea, infesting G. megalophthalma de Man, 1918 ]; Liu, 2008; 691; Román-Contreras, 2008: 93; An, 2011: i, iv, 138–140, figs. 1–1, 5-8–5-10 [East China Sea, infesting G. megalophthalma ].

? Bathygyge sp. Bourdon, 1967c: 857 [Canary Islands, infesting Glyphocrangon sp., parasite misidentified as Gigantione bouvieri Bonnier, 1900 , by Richardson; hyperparasitized by Rolandoniscus serratus (Bourdon, 1967) (Cabiropidae) ]; Lemos de Castro, 1970: 2; Restivo, 1971: 71; Restivo, 1975: 153; Bourdon, 1979c: 510 [Azores, infesting G. longirostris ]; Bourdon et al., 1981: 498; Rybakov, 1990: 415.

? “ bopyrid parasites” Holthuis, 1971: 339 [ Nigeria, infesting G. longirostris ].

? Munidion sp. Wicksten, 1979: 222 [San Clemente Basin, California, infesting G. vicaria ]; Wicksten, 2008: 164 [not Munidion sp.].

? “branchial bopyrid ” Chace, 1984: 11 [West of Halmahera, Indonesia, infesting Glyphocrangon faxoni de Man, 1918 ], 20 [ Philippines, infesting Glyphocrangon pugnax de Man, 1918 ].

Bathygege [sic] grandis Campos and Rosa de Campos, 1989: 33 .

? “ bopyrid isopod” Moore et al., 2003: 368 [Bear Seamount, 39 ° 55′N, 67 ° 30′W; probably infesting G. sculpta (as that is the only Glyphocrangon listed)]; Ahyong, 2006: 68 [Norfolk Ridge, Tasman Sea, infesting Glyphocrangon dimorpha Komai, 2004 ].

“ bopyrid isopod” Han and Li, 2007: 550 [East China Sea, infesting Glyphocrangon megalophthalma de Man, 1918 , material examined herein].

MATERIAL EXAMINED: Infesting Glyphocrangon megalophthalma de Man, 1918 , 1♀, 1♂, 3 cryptoniscus larvae ( CIEGL 002801), East China Sea, Stn. 28, 126 ° 00′E, 26 ° 10′N, 2000–2150 m, 10 June 1978.

DESCRIPTION: Female: Length 12.19 mm, maximal width across pereomere 3, 11.74 mm, head length 2.38 mm, head width 3.74 mm, pereon length 6.33 mm, distorted approximately 66 ° (fig. 6A, B).

Body ovate, all pereomeres distinct. Head ovate, frontal lamina well developed, ex‐ tended, and covering anterior part of head (fig. 6A). Eyes and antennae indistinct. Maxilliped (fig. 6C) with triangular palp, fringed with thick setae. Plectron long and sharp. Barbula (fig. 6D) with two pairs of long falcate lateral projections on each side and one small tubercle near median.

Coxal plates of pereon very long, those of first two pereomeres covering head. Rounded dorsolateral bosses on first four pereomeres. Tergal projections of pereomeres 2–4 distinct (fig. 6A). Brood pouch closed (fig. 6B). Oostegite 1 with two articles, first article rounded with smooth internal ridge, second article with posterolateral point, posterior edge with setae (fig. 6E, F). Pereopods larger posteriorly, subequal in shape (fig. 6H). Pleon short, fused in median portion and abruptly distorted. Pleon of five pleomeres, first four pleomeres with smooth biramous pleopods. Fifth pleomere with uniramous uropods.

Male: Length 5.91 mm, maximal width, across pereomere 4, 1.81 mm, head width 1.00 mm, head length 0.47 mm, pereonal length 3.80 mm. Head elliptical, seperated from first pereomere (fig. 6H). Round yellow eyes near posterior edge of head (fig. 6H). Antennule of 3 articles, antenna of five articles, all terminally setose (fig. 6J). Pereon segments distinct (fig. 6H), subequal in width. Pereopods subequal in size. Dactyli of first four pereomeres much larger than others (fig. 6K, L). Carpi of last two peropods long, other pereopods with rounded carpi (fig. 6I, K, L). First four pereopods larger than last three, dactyli of first two larger than others (fig. 6L). Pleon fused into single piece, one proximal tubercle on medioventral surface of pleon; pleopods and uropods lacking (fig. 6I).

HOSTS AND LOCALITIES: Infesting Glyphocrangon longirostris (Smith, 1882) , G. megalophthalma de Man, 1918 , G. sculpta (Smith, 1882) , G. spinulosa (Faxon, 1893) (Crangonidae) , off Nayarit, Mexico, Virginia, Middle Atlantic Bight, South Africa, East China Sea. Possibly also on G. dimorpha Komai, 2004 , G. faxoni de Man, 1918 , G. pugnax de Man, 1918 , and G. vicaria Faxon, 1896 , from Tasman Sea, Indonesia, Philippines and California.

REMARKS: This species is in need of reexamination, as is it unclear whether it is or is not a single species with a circumglobal distribution. Unfortunately, the type female was severely damaged even before it was described and no additional eastern Pacific specimens have been collected. Markham (1985a) deferred to Adkison (cited in Markham, 1985a), who indicated he was going to redescribe the species and discuss its systematic position, but that study was never published. Markham (1985a) thought this species was closest to Pseudione affinis (G. O. Sars, 1883) , and that it probably should be reassigned to its own subfamily. The present female has three cryptoniscus larvae (fig. 6M) attached to the surface of the oostegites.

Figures

Fig. 6. Bathygyge grandis Hansen, 1897, female (CIEGL002801) (A–G): A. Dorsal view. B. Ventral view. C. Left maxilliped, external view. D. Left side of barbula. E. Left oostegite 1, external view. F. Left oostegite 1, internal view. G. Right pereopod 1. Male (CIEGL002801) (H–M): H. Dorsal view. I. Ventral view. J. Antennae and antennule. K. Pereopod 1. L. Pereopod 7. Scale: 2 mm (A, B); 1 mm (D–I); 0.5 mm (C, K–M); 0.25 mm (J).