Zygophylax africana, STECHOW, 1923

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 : 62

ZYGOPHYLAX AFRICANA STECHOW, 1923

( FIGS 5G, H , 6 )

Zygophylax africana Stechow, 1923a: 106–107 ; 1925: 445–446, fig. 18; Millard, 1964: 15–18, fig. 4A–F; 1968: 263; 1973: 28, fig. 4B; 1975: 189–190, fig. 62A–E; 1977: 106; 1980: 131; Gravier-Bonnet, 1979: 29; Rees & Vervoort, 1987: 75; Bouillon et al., 2006: 341; Ruthensteiner et al., 2008: 25; Altuna, 2012: 5–8 , figs 2, 3; Campos et al., 2020: 540–543, pl. 2A–G.

? Zygophylax africana: Hirohito, 1983: 22–24 , fig. 6; 1995: 136–138, fig. 40a–e.

Zygophylax africanus: Vervoort & Watson, 2003: 69 [incorrect subsequent spelling]. hydrocladia ( Fig. 6B, C ), borne on short pedicels, tubular, distal part curved abaxially and forming angles of 15°–45° with the proximal part, diaphragm straight to oblique, margin slightly everted, with or without renovations ( Fig. 6C ). Nematothecae on hydrocladia, hydrocauli and apophyses of hydrocladia; tubular, with basal diaphragm ( Fig. 6D ).

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 6. Type material of Zygophylax africana Stechow, 1923. A, various colonies; B, portion of polysiphonic hydrocaulus with four monosiphonic hydrocladia, the left and the right arrows indicate an axillary hydrotheca and a nematotheca, respectively; C, hydrothecal diaphragm (lower arrow) and renovations (upper arrow); D, magnification of the nematotheca in B, the arrow indicates a diaphragm within the nematotheca. From samples: A, ZSM 20040731, the arrow indicates the lectotype, other colonies are parelectotypes; B–D, ZSM 20041574, paralectotype. A–D, near Cape Town, South Africa. A–D, light microscope images. Scale bars: A = 1 cm; B = 1 mm; C, D = 100 µm.