Eucheilota maculata Hartlaub, 1894

Peter Schuchert, 2017, Systematic notes on some leptomedusa species with a description of Neotima galeai n. spec. (Hydrozoa, Cnidaria), Revue suisse de Zoologie 124 (2), pp. 351-375 : 365-366

Eucheilota maculata Hartlaub, 1894: 193 . – Hartlaub, 1897: 499, pl. 20 figs 4-8. ‒ Russell, 1953: 311, text-figs 193- 195. – Kramp, 1959a: 154, fig. 206. – Kramp, 1961: 174. – Werner, 1968: 136, figs 2-20, life cycle. – Russell, 1970: 256, figs 19s-20s. – Cornelius, 1995: 157, fig. 35. ‒ Nagata et al., 2014: 304, figs 17-18, Brazil.

Campanulina hincksii Hartlaub, 1897: 496 , pl. 21, pl. 22 fig.

11. – Cornelius, 1995: 157, fig. 35.

Campomma hincksi . – Stechow, 1921: 255.

? Eucheilota maculata . ‒ Goy, 1979: 277, fig. 16.

Material examined: About 50 specimens; France, Normandy, Luc-sur-mer, 49.32102°N 00.3443527°W, 0 m depth, collected 18.05.2005; DNA isolate 386, 16S sequence FJ550501 , 18S FJ550587 , 28S FJ550444 ; DNA isolate of second specimen DNA1136 , 16 S KY363942 .

Diagnosis: Eucheilota medusa with a large black dot on each of the four interradial sides of the stomach. Umbrella diameter about 13 mm (range 10-20 mm), usually hemispherical or slightly higher, apical jelly somewhat thickened, no gastric peduncle. Top of subumbrella rather flat. Velum width ca 1/5 of bell radius. Manubrium short, cruciform cross-section, base not much larger than oral end, mouth simple, four perradial, slightly recurved lips. Radial canals four, narrow. Gonads elongate in females, covering 2/3 of radial canals, separated from circular canal and manubrium, when fully developed slightly wavy. Marginal tentacles typically 16 (occasionally 20) when mature, with distinct basal bulbs, between each pair of tentacles 1-3 small, rudimentary bulbs without tentacles. Tentaculate bulbs and sometimes also rudimentary bulbs with a lateral spiral cirrus on each side. Eight closed statocysts with 5-6 concretions each.

Polyp stage forming branched colonies of the “ Campanulina ” type, see Werner (1968) or Cornelius (1995).

of life medusae and to extract DNA sample 247; 16S FJ550493 , COI KT981899 , 18S FJ550570 , 28S FJ550427 .

Description of New Zealand material: Small medusa (diameter up to 3 mm), bell nearly hemispherical, jelly somewhat thickened at apex, otherwise moderately thin, without apical process. Velum width ca 1/6 of bell radius. Manubrium short, cruciform cross-section, base quadrangular, only slightly larger than oral end, mouth cruciform, simple, four perradial, slightly recurved Distribution: Southern North Sea, western Baltic Sea, English Channel, Argentina, Brazil, and southwest of India ( Cornelius, 1995; Nagata et al., 2014). Type locality: North Sea, Helgoland.

References: Russell (1953), Cornelius (1995).

Figures

Fig. 14. Eucheilota maculata, after life. (A) Lateral view. (B) Oral view. (C) Enlarged bell rim in oral view, showing tentacle bulbs (tb), cirri (ci), and one statocyst (s); cc ‒ circular canal, ex ‒ exumbrella, rb ‒ rudimentary bulb.