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Marine Red Algae from the North Coast of Papua New Guinea 7759

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Marine Red Algae from the North Coast of Papua New Guinea 7759 anica Marina Vol. 43, 2000, pp. 315—346 © 2000 by Walter de Gruyter • Berlin New York Vlums Instituut voor de Zee Randan Marine Institute Marine Red Algae from the North Coast of Papua New Guinea 7759 E. Coppejans3* and A. J. K. Millarb a Department of Biology, Laboratory of Botany, University of Ghent, K.-L. Ledeganckstraat 35, B-9000 Ghent, Belgium b National Herbarium of New South Wales, Royal Botanic Gardens Sydney, Mrs Macquaries Road, Sydney, NSW 2000, Australia * Corresponding author The marine benthic red algae of the north coast of Papua New Guinea are documented, and 27 of the 151 + species are illustrated. All taxa are listed with bibliographic, taxonomic, and biogeographic comments. Only two species are based on type specimens collected from Papua New Guinea {Halymenia durvillei and Chrysy­ menia kaernbachii). Apart from several new taxa identified in the collections, there are no endemic species known from these shores. As a result of this survey, Laurencia columellaris Borgesen is transferred to the genus Chondrophycus, and Eupogodon palmatifidus is transfered to the genus Dasya. The discovery of the Caribbean genus Rhodogorgon constitutes a major range extension as does that of the North Atlantic Nito­ phyllum punctatum. The deep-water alga Renouxia, also known from the south coast of Papua New Guinea, is now reported from the north coast, and Polysiphonia polyphysa is recorded for the first time since its discovery and description in the 1850s. The marine red algal flora appears to reflect a typical tropical western Pacific component. Introduction green algae (Chlorophyta). This growing research in­ terest is a combined effect of the presence of two field The tropical western Pacific region has received at stations (the Belgian Biological Station on Laing Is­ least some attention regarding its marine benthic al­ land and the American Christensen Research Insti­ gae over the previous three decades. Floristic works tute), and the successful procurement of funds speci­ and checklists have been published from several fically targeting taxonomic research by the first au­ countries including the Philippines (Silva et al. 1987), thor. This has allowed easy access to and critical Indonesia (Coppejans and Prud’homme van Reine study of the marine algae of the northern coast over 1992, Verheij and Prud’homme van Reine 1993), the past 20 years. Unfortunately, the recent closure northern Australia (Lewis 1984, 1985, 1987), Taiwan of both biological stations will make future collec­ (Lewis and Norris 1987), Thailand (Velasquez and tions from this area difficult. Lewmanomont 1975, Lewmanomont and Ogawa 1995), Vietnam (Dawson 1954, Dinh et al. 1993), the Solomon Islands (Womersley and Bailey 1970), Mi­ Survey methods cronesia (Tsuda and Wray 1977), and New Caledonia All collection localities listed in this paper are in­ (Garrigue and Tsuda 1988). In marked contrast, cluded in maps published by Coppejans and Meinesz however, the marine algae of Papua New Guinea are (1988: figs 1, 2) and Coppejans (1992: map 1). The considerably less well known with some surveys from history of marine algal collections and collectors of the southern coast only recently being published Papua New Guinea (PNG) over the past 200 or so (Heijs 1985 a, 1985 b, Ohba and Enomoto 1992, Cop­ years is given by Millar et al. (1999). Four collecting pejans et al. 1995 a, 1995 b, Millar et al. 1999) where expeditions were spread over a 10-year period approximately 280 species are now documented. (June-August 1980, July-August 1986, June-Au­ For the history of marine algal exploration in gust 1988, July-August 1990) with on-site laborato­ Papua New Guinea, mainly carried out in the 19th ries and accommodation being used at the Laing Is­ and early 20th century, we refer to Millar et al. 1999. land Biological Station (Hansa Bay, Bogia) and at Apart from two publications dealing with the green the Christensen Research Institute (Nagada Harbour, algal genus Caulerpa (Coppejans and Meinesz 1988; Madang). The majority of the collecting was carried Coppejans 1992) and a short list of marine Chlo­ out along the coast between Hansa Bay and Madang, rophyta (Enomoto and Ohba 1992), there are no re­ but in 1986 the research was extended to the Saidor cently published accounts of the algal flora from the area (Astrolabe Bay). A single collection was made north coast of Papua New Guinea. The present re­ next to Lae Harbour. At all localities, both intertidal port deals with red algae, and projects are currently and subtidal SCUBA collections were made to depths underway that deal with the brown (Phaeophyta) and of 50 m. This resulted in approximately 2350 herbar- 316 E. Coppejans and A. J K. Millar ium vouchers and numerous formalin preserved spec­ Type locality. Lake Mälaren, near Stockholm, Swe­ imens. The main collection is deposited in the herbar­ den. ium of the University of Ghent (GENT). Some dupli­ Voucher. HEC 6600 d, 27.8. 1986: Boisa Island, cate specimens are deposited in the herbarium of the epiphytic on Ceramium, on Gelidiopsis repens. University of Papua New Guinea (UPNG) and in the National Herbarium of New South Wales, Australia Stylonema Reinsch (NSW). Duplicates from the 1990 collections are also Stylonema alsidii (Zanardini) K. Drew 1956: 72 deposited in the Herbarium of Leiden, the Nether­ Coppejans [1983: pi. 96, = Goniotrichum alsidii lands (L), the Herbarium of the Christensen Research (Zanardini) Howe], Institute (Madang, PNG) and in the herbarium of Type locality. Trieste, Italy. Lae (PNG). As the four collecting expeditions took Voucher. HEC 6600 e, 27.8.1986: Boisa Island, place in the same season, a number of seasonal spe­ epiphytic on Ceramium, on Gelidiopsis repens. cies most probably are absent from this list. More­ over, small species (turf algae, epiphytic species) as well as non-geniculate Corallinaceae have been col­ Class Rhodophyta lected only sporadically. Subclass Florideophycideae Order Nemaliales Family Galaxauraceae Arrangement and format of the catalogue Actinotrichia Decaisne The systematic arrangement of orders and families Actinotrichia fragilis (Forsskâl) Borgesen 1932 a: 6. essentially follows that of Silva et al. (1996) except Jaasund (1976: 65, fig. 131); Magruder and Hunt for the recognition of the Halymeniales Saunders et (1979: 57, fig. 2, p. 56); Tseng (1984: 58, pi. 32, fig. 1); Kraft (1996). For each species, references are given Verheij and Prud’homme van Reine (1993: 439, pi. to publications where a description and or illustra­ 14, fig. 1). tion can be found corresponding to our specimen(s), Type locality Mokha, Yemen. and the type locality is given as at least one distribu­ Vouchers'. HEC 4301, 3. 6. 1980: Hansa Bay, Bisal- tional record. References cited for descriptions and pap Reef; HEC 7722, 7. 7. 1988, Boisa Island, N- illustrations which are listed ‘as’ refer to misapplied coast; HEC 7908, 25. 7. 1988: Saidor area, Gumbi names or ‘= ’ where they are synonyms. A selection Bay; Copp & PvR 13300, 21. 7. 1990: Neptunus Point of specimens from PNG are illustrated that are not (close to Ulingan Bay); Copp & PvR 13549, extensively covered in previous publications. Voucher 2. 8. 1990: Bagabag, New Year’s Bay. specimens of Coppejans (HEC = Herbarium Eric Note\ In addition to the typical divaricate growth Coppejans), filed in GENT, and of Coppejans and forms generally seen in this species, we also have Prud’homme van Reine (Copp & PvR), filed in Gent some specimens (HEC 4614 and Copp & PvR 13300) and L (Leiden) are then cited. Due to the large with very small branching angles, but we are satisfied number of specimens collected from many sites, we that both forms represent the same species. have chosen to limit to five the number of vouchers listed for each species. These are chosen to reflect the Galaxaura Lamouroux broad distribution within the study area and include Galaxaura divaricata (Linnaeus) Huisman et Town­ three locations along the mainland coast and (where send 1993: 100, fig. 2. available) two from remote islands (Manam, Boisa and Bagabag). They are chronologically arranged. T. Tanaka (1936: 147, figs 5,6, pi. 34, fig. 3, = G. Notes regarding various aspects of taxonomy, sys- fasciculata Kjellman); Womersley and Bailey (1970: tematics, nomenclature, or aberrant characters, and 303, = G. fasciculata). distribution are added. Type locality. Océano Asiático. Vouchers'. HEC 6532, 18. 8. 1986: Megiar Harbour; HEC 7749, 7. 7. 1988: Boisa Island, S. coast; HEC Catalogue of the Marine Red Algae 8037, 1. 8. 1988: Ulingan Bay, W. side; Copp & PvR of the North Coast of Papua New Guinea 13196, 16. 7. 1990: Nagada Harbour; Copp & PvR 13547, 2. 8. 1990: Bagabag, New Year’s Bay. Class Rhodophyta Subclass Bangiophycideae Galaxaura filamentosa Chou in W. R. Taylor 1945: Order Porphyridiales 139. Family Porphyridiaceae Chou (1945: 39, pi. I, figs 1 -6 , pi. VI, fig. 1); Ma­ Chroodactylon Hansgirg gruder and Hunt (1979: 67, lower fig. on p. 66). Type locality. Isla Clarión, Isias Revillagigedo, Chroodactylon ornatum (C. Agardh) Basson 1979: 67. Mexico. Coppejans (1983: pi. 92); Cribb (1983: 9, pi. 1, Vouchers'. HEC 6568, 20. 8. 1986: Bogia Bay; HEC figs 7-8); Womersley (1994: 23, fig. 1C). 7466, 17. 6. 1988: Bogia Bay, Kolakola Island; HEC Marine red algae of northern Papua New Guinea 317 7650, 1. 7. 1988: Hansa Bay, Barol Point; HEC 7743, tergrades. In our collections, only HEC 6508 has pro­ 7. 7. 1988: Boisa Island, S. coast; Copp & PvR 13313, nounced verticillate filaments. 21. 7. 1990: Ulingan Bay, S. side; Copp & PvR 13580, 5. 8. 1990: landward slope of the barrier reef, N of Scinaia Bivona-Bernardi Tab Island. Scinaia hormoides Setchell 1914: 106, 125, pi. 12: Galaxaura marginata (Ellis et Solander) Lamouroux figs 33-35; pi. 13: figs 36, 37. Fig. 1* 1816: 264. Magruder and Hunt (1979: 93, upper fig. on p.
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