Amphogona apsteini

Autor: Schuchert, Peter, Collins, Richard
Rok vydání: 2021
Předmět:
DOI: 10.5281/zenodo.5710653
Popis: Amphogona apsteini (Vanhöffen, 1902) Fig. 59 A-B Pantachogon apsteini Vanhöffen, 1902: 65, pl. 10 fig. 18, pl. 11 fig. 28. Amphogona apsteini. ‒ Browne, 1905: 740, pl. 54 fig. 5, pl. 56 fig. 1, pl. 57 figs 10-15. ‒ Bigelow, 1909: 126, pl. 2 figs 1-2, pl. 34 figs 12-15, pl. 45 fig. 10. ‒ Mayer, 1910: 405, fig. 257. ‒ Kramp, 1959a: 188, fig. 280. ‒ Kramp, 1965: 123, figs 12-13. ‒ Kramp, 1968: 118, fig. 319. ‒ Bleeker & Van der Spoel, 1988: 241, fig. 37. Examined material: BFLA; 1 specimen; 09-DEC- 2019; size 2 mm, juvenile; preserved in alcohol for DNA extraction; 16S sequence could not be obtained as PCR failed repeatedly. – 05-JUL-2019; 2 specimens photographed, 2 mm, not collected. Observations: Bell diameter 2 mm, flatter than hemisphere, jelly relatively thin especially towards margin; with thin gastric peduncle reaching almost to level of velum (Fig. 59B); stomach small, lips inconspicuous. Eight radial canals. Gonads when fully developed ellipsoidal, pendant, close to ring canal, all of equal size or larger ones and smaller ones alternating; long axis of ellipsoidal gonads vertical (Fig. 59A). About 70 tentacles, all the same structure. One to two statocysts per octant. Distribution: Circumglobal in warm waters. In the Indian Ocean from Indonesia to Moçambique (Kramp, 1953, 1968; Bouillon, 1978a); in the Pacific Ocean from eastern Australia, to the northern Part of the China Sea and Peru (Kramp, 1953, 1965; Bouillon, 1978c; Du et al., 2010; Oliveira et al., 2016). In the South Atlantic from Argentina to Brazil and to western Africa (Kramp, 1955b; Nagata et al., 2014; Oliveira et al., 2016). In the North Atlantic reported from the mid Atlantic to Florida (Bleeker & Van der Spoel, 1988; Larson et al., 1991; this study). Type locality: Indian Ocean, west coast of Sumatra. Remarks: Kramp (1959a, 1965, 1968) states that the unequal size of the gonads, with small and larger ones alternating, is a characteristic trait of this species. However, this is found only in younger specimens, mature ones seem to have equally developed gonads (Bigelow, 1909; Nagata et al., 2014). Kramp gives also a bell size of 4 to 6 mm. Our specimens were smaller (2 mm). The type material was 2 to 3 mm in size, although perhaps not fully mature. Also Nagata et al. (2014) give a bell size of 2 to 3 mm.
Published as part of Schuchert, Peter & Collins, Richard, 2021, Hydromedusae observed during night dives in the Gulf Stream, pp. 237-356 in Revue suisse de Zoologie 128 (2) on pages 332-334, DOI: 10.35929/RSZ.0049, http://zenodo.org/record/5639938
{"references":["Vanhoffen E. 1902. Die Craspedoten Medusen der deutschen Tiefsee Expedition 1898 - 1899. I. Trachymedusen. Wissenschaftliche Ergebnisse der Deutschen Tiefsee Expedition \" Valdivia \" 3: 55 - 86, pls 1 - 12.","Browne E. T. 1905. Hydromedusae with a revision of the Williadae and Petasidae. Fauna and geography Maldives and Laccadives Archipelagoes 2 (3): 722 - 749, pls 54 - 57.","Bigelow H. B. 1909. The Medusae. Reports on the scientific results of the expedition to the eastern tropical Pacific, in charge of Alexander Agassiz, by the U. S. Fish Commission steamer \" Albatross \" from October, 1904, to March, 1905. XVI. Memoirs of the Museum of comparative Zoology at Harvard College 37: 1 - 243, pls 1 - 48.","Mayer A. G. 1910. Medusae of the world. Hydromedusae, Vols. I & II. Scyphomedusae, Vol III. Carnegie Institution, Washington, pp. 735, plates 1 - 76.","Kramp P. L. 1959 a. The Hydromedusae of the Atlantic Ocean and adjacent waters. Dana Report 46: 1 - 283.","Kramp P. L. 1965. The hydromedusae of the Pacific and Indian oceans. Dana Report 63: 1 - 162.","Kramp P. L. 1968. The hydromedusae of the Pacific and Indian oceans. Sections II and III. Dana Report 72: 1 - 200.","Van Der Spoel S., Bleeker J. 1988. Medusae from the Banda Sea and Aru Sea plankton, collected during the Snellius II expeditions, 1984 - 1985. Indo Malayan Zoology 5: 161 - 202.","Kramp P. L. 1953. Hydromedusae. Scientific Report of the Great Barrier Reef Expedition 6 (4): 259 - 322.","Bouillon J. 1978 a. Hydromeduses de l'Archipel des Sechelles et du Mozambique. Revue de Zoologie Africaine 92 (1): 117 - 172.","Bouillon J. 1978 c. Hydromeduses de la mer de Bismarck (Papouasie, Nouvelle-Guinee). II. Limnomedusa, Narcomedusa, Trachymedusa et Laingiomedusa (sous classe nouv.). Cahiers de Biologie Marine 19: 473 - 483.","Du F., Xu Z., Huang J., Guo D. 2010. New records of medusae (Cnidaria) from Daya Bay, northern South China Sea, with descriptions of four new species. Proceedings of the Biological Society of Washington 123 (1): 72 - 86.","Oliveira O. M. P., et al .. 2016. Census of Cnidaria (Medusozoa) and Ctenophora from South American marine waters. Zootaxa 4194 (1): 1 - 256. DOI: 10.11646 / zootaxa. 4194.1.1","Kramp P. L. 1955 b. The medusae of the tropical west coast of Africa. Atlantide Report 3: 239 - 324, pls 1 - 3.","Nagata R. M., Nogueira Junior M., Haddad M. A. 2014. Faunistic survey of Hydromedusae (Cnidaria, Medusozoa) from the coast of Parana State, Southern Brazil. Zootaxa 3768 (3): 291 - 326.","Larson R. J., Mills C. E., Harbison G. R. 1991. Western Atlantic midwater hydrozoan and scyphozoan medusae: in situ studies using manned submersibles. Hydrobiologia 216 - 217: 311 - 317."]}
Databáze: OpenAIRE
Externí odkaz: