Sertularella jorgensis El Beshbeeshy, 1991

Galea, Horia R., 2007, Hydroids and hydromedusae (Cnidaria: Hydrozoa) from the fjords region of southern Chile, Zootaxa 1597 (1), pp. 1-116 : 63-64

Sertularella jorgensis El Beshbeeshy, 1991

(fig. 14G, H, table 22)

Sertularella jorgensis El Beshbeeshy, 1991: 171 , fig. 43. Material examined. Stn. CFQ — 29.iii. 2005, 32 m, S45: one colony composed of 2 erect stems, one with 3 hydrothecae, the other with 10 hydrothecae and about 1.2 cm high; two sessile hydrothecae also present on stolon (MHNG INVE 53215 ); all material sterile; on stems of Hybocodon chilensis .

Type locality. Atlantic coast of South America, roughly between 41°27'– 56°57' S , 54°06'– 62°45' W.

Description. Stolon creeping on stems of Hybocodon chilensis . Colony composed of two small, erect stems of 3 and 10 hydrothecae, respectively, and two hydrothecae arising from stolon (probably the mostbasal hydrothecae of two young stems). Colony monosiphonic and unbranched. Stems slightly zigzag, divided into internodes by means of weak, oblique constrictions of perisarc. Internodes long, straight, slender, longer in basal part than in proximal of stem. Hydrothecae biseriate, alternate and coplanar; tubular or nearly tubular, with ad- and abcauline walls nearly parallel. Abcauline side straight or slightly concave. Free adcauline part straight, with wavy surface (3–4 undulations), longer than adnate part. Rim somewhat everted, composed of four marginal, pointed cusps, delimiting four moderately deep, rounded embayments. Closing apparatus composed of four triangular flaps with concentric striation. No internal submarginal perisarc projections. Periderm transparent, thicker in basal part of colony. All hydranths retracted inside their corresponding hydrothecae; on abcauline side a digestive caecum seems to be present. Gonothecae absent.

Remarks. The gonothecae of this species are still unknown.

World distribution. Probably endemic to Patagonia, previously found on the Atlantic coast of Argentina ( El Beshbeeshy 1991).

Records from Chile. The present material was collected from Canal Farquhar. This is the first record for Chile.