Hydroids (Cnidaria, Hydrozoa) of the Danish expedition to

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148 Type locality: Murray Island, Torres Strait, Australia, 27–37 m. Pteroclava crassa (Pictet, 1893) Syncoryne crassa Pictet, 1893: 8, pl. 1: figs 3–4. – Boero, Bouillon & Gravier-Bonnet 1995: 71. Remarks No new material of this species could be obtained. Examination of the type material of Syncoryne crassa Pictet, 1893 (MHNG INVE 25777) showed that it has moniliform tentacles and thus conforms to the genus Pteroclava (see Boero, Bouillon & Gravier-Bonnet 1995). Additionally, the few gonophores present revealed that they must develop into medusae with only two tentacle bulbs. The material strongly resembles Pteroclava krempfi (Billard, 1919a). However, Pteroclava krempfi is only known to occur on Octocorallia while Pteroclava crassa was found on the hydrorhiza of the hydroid Macrorhynchia philippina. Boero, Bouillon & Gravier- Bonnet (1995) regarded them therefore as separate species. Family Pennariidae Pennaria disticha Goldfuss, 1820 Pennaria disticha Goldfuss, 1820: 89. – Brinckmann-Voss 1970: 40, text-figs 43, 45–50. – Gibbons & Ryland 1989: 387, fig. 5. – Schuchert 1996: 142, fig. 85a–c. – Migotto 1996: 25. Pennaria Cavolinii Ehrenberg, 1834: 297. – Pictet 1893: 12, pl. 1: figs 7–9. – von Campenhausen 1896b: 307. – Weltner 1900: 585. Pennaria australis Bale, 1884: 45. Halocordyle disticha var. australis. – Vervoort 1941: 192. Halocordyle disticha. – Millard 1975: 41, figs 16C–G. – Garcia-Corrales & Aguirre 1985: 85, figs 1–3, synonymy. – Calder 1988: 57, figs 43–45, synonymy. – Östman et al.1991: 607, figs 1–18. – Hirohito 1988: 28, fig. 9a– d, pl. 1: fig. C. Material examined: Kei Islands Expedition stations 11. – 104, fertile. – 116. – Kei Islands Expedition, Moluccas, Ambon, pier of harbour, 1 m, 28.02.1922, well preserved and fertile. – MHNG INVE 31269, Bay of Ambon, material of Pictet (1893), jar labelled Dendroclava Dohrni, collected 15 Jul–12 Aug 1890, with mature medusoids. – MHNG INVE 29809, Mediterranean, Mallorca, Cala Murada, 1 m, coll. 24 Aug 2000. Diagnosis Anthoathecata Capitata with hydroid phase P. SCHUCHERT forming erect, pinnately branched stems, height 10 cm and more, hydranths on upper side of branches, pedicellate, body pear-shaped, one aboral whorl of filiform tentacles and distal to them scattered capitate tentacles. Gonophores oblong medusoids without tentacles, short-lived, released with mature gonads. Remarks This characteristic and well known species needs no special comments. Its synonymy is well known and there were no significant differences between the Pacific and Mediterranean material. According to current usage, the genus name Pennaria is preferred over Halocordyle (see Schuchert 1996). Distribution Circumglobal in tropical to warm-temperate waters. Type locality: Gulf of Naples, Mediterranean. Fig. 8. Solanderia secunda (Inaba, 1892). A. Colony silhouette. B. Skeleton of terminal branch with triangular hydrophores. – Scales: A = 3 cm; B = 0.2 cm.
Family Solanderiidae HYDROIDS OF THE DANISH EXPEDITION TO THE KEI ISLANDS Solanderia secunda (Inaba, 1892) Fig. 8. Dendrocoryne secunda Inaba, 1892: 98, figs 111–113. Solanderia secunda. – Hirohito 1988: 49, fig. 15. – Bouillon, Wouters & Boero 1992: 12, pls 5–6, 10–12, synonymy. – Watson 1999: 13, fig. 9A–F. Solanderia minima. – Millard & Bouillon 1973: 16, fig. 2A– B, pl. 1. – Millard 1975: 59, fig. 21C–E. Material examined: Kei Islands Expedition, Banda Islands, Neira Island, 25 m, coll. 14 Jun 1922, without gonophores, colony broadly fanshaped, dimension 22 x 18 cm, stem and thicker branches darkly coloured. Diagnosis Solanderiidae with hydranth bases flanked by two parallel, broadly triangular periderm processes (hydrophores). Remarks This is the first find of S. secunda in Indonesian waters, but it lies well within the known distribution of this species. All Solanderia species have recently been revised by Bouillon, Wouters & Boero (1992) and several nominal species were synonymized. For detailed descriptions of this species see Bouillon, Wouters & Boero (1992), Millard (1975, as S. minima), or Watson (1999). Distribution Tropical and subtropical Pacific and Indian Ocean, reaching from Japan over Australia to South Africa and the Red Sea. Type locality: Misaki, Japan. Family Tubulariidae Ectopleura viridis (Pictet, 1893) Fig. 9. Tubularia viridis Pictet, 1893: 17, pl. 1: figs 10–11. – Billard 1905: 331, figs 1–3. Ectopleura pacifica Thornely, 1900: 452, pl. 44: figs 1, 1a. New synonym. Ectopleura pacifica. – Petersen 1990: 165. – Schuchert 1996: 112. Tubularia pacifica. – Borradaile 1905: 838. Not Ectopleura pacifica. – Mammen 1963: 59, figs 27–29 [= Ectopleura indica Petersen, 1990]. 149 Fig. 9. Ectopleura viridis (Pictet, 1893); after type material. Hydranth with part of caulus. – Scale: 1 mm. Type material examined: MHNG INVE 31350, coll. Pictet and Bedot, 14 Aug 1890, Port of Ambon, Moluccas, on sponge, depth 1 m, several stems with medusa buds. Other material examined : Kei Islands Expedition, labelled as Ectopleura pacifica, Banda Islands, off Neira Island, 10 m, on Melitodes ochracea (Octocorallia), 1.06.1922, several stems with medusae buds. – ZMUC, as Ectopleura pacifica, Laing Island, Papua New Guinea, 40 m, July 1977, coll. J. Bouillon, on crab; solitary, very short hydroids, perhaps does not belong to E. viridis. Description Hydroid erect, 0.5–1.0 cm, stems not branched, smooth, curved or not, 0.3–0.4 mm diameter, periderm firm, transparent, at distal end of caulus a neck-region, neck-region with filmy perisarc which originates below distal end of stem, with collar formation (see Petersen 1990). Hydranth body ovoid, 1.0–1.2 mm high, one whorl of 16– 20 oral tentacles, oral tentacles relatively short and stubby, nematocysts concentrated at tip. At hydranth base on whorl of 18–25 long, filiform
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