Zygophylax pacifica, STECHOW, 1920

Gu, Zhangjie, Ruthensteiner, Bernhard, Moura, Carlos J., Liu, Lihua, Zhang, Rui & Song, Xikun, 2022, Systematic affinities of Zygophylacidae (Cnidaria: Hydrozoa: Macrocolonia) with descriptions of 15 deep-sea species, Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 196, pp. 52-87 : 72-73

ZYGOPHYLAX PACIFICA STECHOW, 1920

( FIGS 5N–Q , 15 )

Zygophylax biarmata: Stechow, 1913b: 114–115 , fig. 88.

Zygophylax pacifica Stechow, 1920: 11 ; 1923b: 10; 1923c: 141–142; Vervoort, 1941: 198–199; Yamada, 1959: 48; Hirohito, 1983: 29, fig. 10; 1995:142–144, fig. 43e, f,

pl. 9, fig. B; Rees & Vervoort, 1987: 74; Ruthensteiner et al., 2008: 25.

? Zygophylax pacifica: Leloup, 1938: 10 .

Type locality: Sagami Bay, Japan; 250 m.

Specimens examined: Five syntypes and two colonies from Japan, all the specimens are infertile; see details in Supporting Information , Table S1 .

Lectotype designation: Lectotype, an infertile, formalin-fixed then ethanol-preserved colony ZSM 20040198 ( Fig. 15A–D ); paralectotypes, ZSM 20041554 – ZSM 20041556 , ZSM 20043569 ( Figs 5N–Q , 15E, F ), microslides .

Figures

Figure 5. Type materials (all paralectotypes) of five Zygophylax species deposited in the Zoologische Staatssammlung München.A–F,Z. abyssicola (Stechow, 1926), ZSM 20043537–ZSM 20043542; G, H, Z. africana Stechow, 1923, ZSM 20041574, ZSM 20043579; I–M, Z. curvitheca Stechow, 1913, ZSM 20043570–ZSM 20043574; N–Q, Z. pacifica Stechow, 1920, ZSM 20041554–ZSM 20041556, ZSM 20043569; R–U, Z. valdiviae Stechow, 1923, ZSM 20041566–ZSM 20041569. Scale bars: A–U = 2 cm.

Figure 15. Type material and recent material of Zygophylax pacifica Stechow, 1920. A, G, colonies; B, H, polysiphonic portions of hydrocauli with alternate, monosiphonic hydrocladia; C, I, two axillary hydrothecae; D, E, J, three hydrothecae, showing diaphragms, renovations and basal nematothecae [D and J showing single nematothecae, E and F (magnification) showing a pair of nematothecae]. From samples:A–D:ZSM 20040198; E, F: ZSM 20041556; G–J: XMUB6610.A–D, lectotype; E, F, paralectotype; G–J, materials in this study.A–F, Sagami Bay; G–J, Shimoda, Japan.A–J, light microscope images. Scale bars: A, G = 1 cm; B, H = 2 mm; C, I = 500 µm; D, E, J = 200 µm; F = 50 µm.