Ectopleura dumortieri Van Beneden
Ectopleura dumortieri (Van Beneden) (Fig. 10) References consulted. Russell 1953: 76–79, fig. 33 A– D. Kramp 1961: 34. Bouillon 1999: 420, fig. 3.68. Tronolone 2001: 80–83, fig. 19. Bouillon et al. 2004: 105, fig. 55, G– J. Tronolone 2007: 53–54, fig. 2.20; Nogueira 2012, fig. 7. Material. Municipal...
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2014
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| Online Access: | https://dx.doi.org/10.5281/zenodo.5689021 https://zenodo.org/record/5689021 |
| Summary: | Ectopleura dumortieri (Van Beneden) (Fig. 10) References consulted. Russell 1953: 76–79, fig. 33 A– D. Kramp 1961: 34. Bouillon 1999: 420, fig. 3.68. Tronolone 2001: 80–83, fig. 19. Bouillon et al. 2004: 105, fig. 55, G– J. Tronolone 2007: 53–54, fig. 2.20; Nogueira 2012, fig. 7. Material. Municipality of Pontal do Paraná, Balneário de Praia de Leste: (25 º 44 ’ 15 ”S – 48 º 21 ’ 60 ”W): 01/ 12 / 1997 — 1 specimen; (25 º 46 ’ 32 ”S – 48 º 12 ’ 15 ”W): 01/ 12 / 1997 — 2 specimens; (25 º 42 ’ 65 ”S – 48 º 27 ’ 85 ”W): 22 / 12 / 1997 — 3 specimens; (25 º 46 ’ 32 ”S – 48 º 12 ’ 15 ”W): 22 / 12 / 1997 — 1 specimen; (25 º 48 ’ 10 ”S – 48 º04’ 90 ”W): 22 / 12 / 1997 — 1 specimen; (25 º 48 ’ 10 ”S – 48 º04’ 90 ”W): 20 /02/ 1998 — 2 specimens; (25 º 48 ’ 10 ”S – 48 º04’ 90 ”W): 31 /03/ 1998 — 5 specimens; (25 º 42 ’ 65 ”S – 48 º 27 ’ 85 ”W): 22 /04/ 1998 — 1 specimen; (25 º 42 ’ 65 ”S – 48 º 27 ’ 85 ”W): 24 /06/ 1998 — 1 specimen; (25 º 42 ’ 65 ”S – 48 º 27 ’ 85 ”W): 20 /08/ 1998 — 5 specimens; (25 º 46 ’ 32 ”S – 48 º 12 ’ 15 ”W): 02/ 10 / 1998 — 32 specimens; (25 º 48 ’ 10 ”S – 48 º04’ 90 ”W): 02/ 10 / 1998 — 6 specimens. Reference specimens deposited. Dzoo-Cn 239, 5 specimens. MZUSP 1490, 3 specimens. MZUSP 1498, 1 specimen. World distribution. In the three great oceans, mainly in tropical and subtropical regions, and extending toward cooler regions north and south (Kramp 1961; Santhakumari et al. 1997; Ballard & Myers 2000; Bouillon et al. 2004). In the western Atlantic, from New England (USA) to Panama (Kramp 1961; Miglietta et al. 2008), and Brazil (Migotto et al. 2002). Distribution in Brazil. From the state of Rio de Janeiro to Rio Grande do Sul (Migotto et al. 2002). Description. Umbrella almost spherical, 0.25–0.9 mm in diameter. Thick mesoglea with an apical thickening. Specimens very wrinkled and contracted, with mean size (0.5 mm height) smaller than the sizes mentioned by Bouillon (1999) and Russell (1953) (2–3 mm). Short apical canal in a few individuals. Four radial canals and circular canal. Exumbrella with eight longitudinal cnidocyst rows, arranged in four pairs, extending from the tentacular bulbs to the apex (sometimes not reaching the apex). Manubrium long, extending to the umbrella margin (Fig. 10), or exceeding it. Simple and tubular mouth, armed with cnidocysts. In contracted specimens the manubrium almost fills the subumbrellar cavity. Gonads surrounding the manubrium, leaving the mouth free. Four brown tentacular bulbs. Very extendable tentacles, with clusters of cnidocysts on abaxial surface (Fig. 10). Tentacles usually coiled to each other. Systematic remarks. Schuchert (2013) listed 31 species in the genus. However, most of the nominal species have been described only by part of their life cycle, such as the hydroid, newly released medusae, or adults (Bouillon & Boero 2000). Rearing experiments are thus necessary to elucidate the life cycles of the species (Bouillon & Boero 2000). Genetic studies also have the potential to clarify species by linking different life-cycle stages (Miranda et al. 2010). Only two species from the South Atlantic and Brazil known to produce medusae (Bouillon 1999; Migotto et al. 2002). E. dumortieri can easily be distinguished from E. obypa Migotto & Marques by the presence of four tentacles in the first and only two in the second (Migotto & Marques 1999). Russell (1953) commented that E. dumortieri slightly differentiates in the course of its development, and that newly released medusae are about 1 mm in height. In Brazil, specimens studied by Vannucci (1957) and Tronolone (2001), slightly larger than 1 mm, already had well-developed gonads, similar to the animals found in this study. Biological data. The species was more abundant in the winter months, especially August 1998. Migotto (1996) described the life cycle of populations from the Brazilian coast. The polyp is known in Paranaguá (Altvater 2009), Cananéia (Vannucci 1963), and São Sebastião (Migotto 1996). The medusa is euryhaline, occurring in estuaries such as Cananéia (Vannucci 1957, 1963), Paranaguá (R. Nagata pers. obs.), and São Francisco do Sul (Nogueira 2012). : Published as part of Nagata, Renato Mitsuo, Júnior, Miodeli Nogueira & Haddad, Maria Angélica, 2014, Faunistic survey of Hydromedusae (Cnidaria, Medusozoa) from the coast of Paraná State, Southern Brazil, pp. 291-326 in Zootaxa 3768 (3) on pages 300-301, DOI: 10.11646/zootaxa.3768.3.3, http://zenodo.org/record/252337 : {"references": ["Russell, F. S. (1953) The Medusae of the British Isles. Anthomedusae, Leptomedusae, Limnomedusae, Trachymedusae and Narcomedusae. Cambridge University Press, London, 530 pp.", "Kramp, P. L. (1961) Synopsis of the Medusae of the world. Journal of the Marine Biological Association of the United Kingdom, 40, 7 - 382. http: // dx. doi. org / 10.1017 / s 0025315400007347", "Bouillon, J. (1999) Hydromedusae. In: Boltovskoy, D. (Ed.), South Atlantic Zooplankton. Backhuys Publishers, Leiden, pp. 385 - 465.", "Tronolone, V. B. (2001) Hidromedusas (Cnidaria, Hydrozoa) do canal de Sao Sebastiao, SP. Master Thesis, Universidade de Sao Paulo, Sao Paulo, 184 pp.", "Tronolone, V. B. (2007) Estudo faunistico e da distribuicao das hidromedusas (Cnidaria, Hydrozoa) da regiao compreendida entre Cabo Frio (RJ) e Cabo de Santa Marta Grande (SC), Brasil. PhD Thesis, Universidade de Sao Paulo, Sao Paulo, 217 pp.", "Nogueira, M. (2012) Gelatinous zooplankton fauna (Cnidaria, Ctenophora and Thaliacea) from Baia da Babitonga (southern Brazil). Zootaxa, 3398, 1 - 21.", "Santhakumari, V. & Nair, R. V. (1997) Ecology of hydromedusae from Bombay Harbour-Thana and Bassein Creek Estuarine Complex. Indian Journal of Marine Sciences, 26, 162 - 168.", "Ballard, L. & Myers, A. (2000) Observations on the seasonal occurrence and abundance of gelatinous zooplankton in Lough Hyne, Co. Cork, South - West Ireland. Biology and Environment: Proceedings of The Royal Irish Academy, 100 (2), 75 - 83.", "Miglietta, M. P., Rossi, M. & Collin, R. (2008) Hydromedusa blooms and upwelling events in the Bay of Panama, Tropical East Pacific. Journal of Plankton Research, 30 (7), 783 - 793. http: // dx. doi. org / 10.1093 / plankt / fbn 038", "Schuchert, P. (2013) World Hydrozoa Database. Available from: http: // www. marinespecies. org / hydrozoa (accessed 16 June 2013)", "Bouillon, J. & Boero, F. (2000) Synopsis of the families and genera of Hydromedusae of the world, with a list of the worldwide species. Thalassia Salentina, 24, 47 - 296.", "Miranda, L. S., Collins, A. G. & Marques, A. C. (2010) Molecules clarify a cnidarian life cycle-The \" hydrozoan \" Microhydrula limopsicola is an early life stage of the staurozoan Haliclystus antarcticus. PLoS ONE, 5 (4), e 10182. http: // dx. doi. org / 10.1371 / journal. pone. 0010182", "Migotto, A. E. & Marques, A. C. (1999) Hydroid and medusa stages of the new species Ectopleura obypa (Cnidaria: Hydrozoa: Tubulariidae) from Brazil. Proceedings of the Biological Society of Washington, 112 (2), 303 - 312.", "Vannucci, M. (1957) On Brazilian Hydromedusae and their distribution in relation to different water masses. Boletim do Instituto Oceanografico da Universidade de Sao Paulo, 8 (1 - 2), 23 - 109. http: // dx. doi. org / 10.1590 / s 0373 - 55241957000100002", "Migotto, A. E. (1996) Benthic shallow - water hydroids (Cnidaria, Hydrozoa) of the coast of Sao Sebastiao, Brazil, including a checklist of Brazilian hydroids. Zoologische Verhandelingen, Leiden, 306, 1 - 125.", "Altvater, L. (2009) Composicao e sazonalidade de cnidarios em substrato artificial, na foz do rio Itibere, Baia de Paranagua, Parana. Master Thesis, Universidade Federal do Parana, Curitiba, 167 pp.", "Vannucci, M. (1963) On the ecology of Brazilian medusae at 25 \u00b0 lat. S. Boletim do Instituto Oceanografico da Universidade de Sao Paulo, 13 (1), 143 - 184. http: // dx. doi. org / 10.1590 / s 0373 - 55241963000100002"]} |
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