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Zoosystema 32 (2).Indb Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacifi c by various French expeditions, with the description of nineteen new species Álvaro L. PEÑA CANTERO Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universidad de Valencia/Fundación General, Universidad de Valencia, Apdo. Correos 22085, E-46071 Valencia (Spain) [email protected] Willem VERVOORT National Museum of Natural History, P.O. Box 9517, NL-2300 RA Leiden (The Netherlands) [email protected] Peña Cantero Á. L. & Vervoort W. 2010. — Species of Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) collected in the Western Pacifi c by various French expeditions, with the description of nineteen new species. Zoosystema 32 (2) : 267-332. ABSTRACT Th e species of Acryptolaria present in collections from several French expeditions in KEY WORDS the western Pacifi c, mostly in the waters around New Caledonia and neighbouring Cnidaria, areas, have been studied. Th e collection proved to be rich in biodiversity, since 29 Hydrozoa, Lafoeidae, species were found, of which 19 new to science, doubling the number of known Acryptolaria, species in this genus. All the species are described, including measurements, and deep-water, fi gured. Th e unknown coppiniae of several previously described species have New Caledonia, Western Pacifi c, been found; these are also described and fi gured. Th e study confi rmed the key new species. role of the cnidome for species identifi cation. ABSTRACT Acryptolaria Norman, 1875 (Cnidaria, Hydrozoa, Lafoeidae) récoltés dans le Pacifi que occidental par diverses expéditions françaises, et description de dix-neuf espèces nouvelles. Les espèces d’Acryptolaria présentes dans les récoltes de plusieurs expéditions fran- MOTS CLÉS çaises dans le Pacifi que occidental, principalement dans la région néo-calédonienne, Cnidaria, ont été étudiées. Il s’avère que cet échantillon est d’une biodiversité importante ; Hydrozoa, Lafoeidae, en eff et 29 espèces ont été trouvées dont 19 sont nouvelles pour la science. Ceci Acryptolaria, double le nombre d’espèces connues dans ce genre. Toutes les espèces sont décrites eaux profondes, et illustrées, et leurs mensurations sont indiquées. Les coppiniae inconnus de Nouvelle-Calédonie, Pacifi que occidental, plusieurs espèces déjà décrites ont été trouvés ; ils sont décrits et illustrés. Cette espèces nouvelles. étude confi rme le rôle-clé du cnidome dans l’identifi cation des espèces. ZOOSYSTEMA • 2010 • 32 (2) © Publications Scientifi ques du Muséum national d’Histoire naturelle, Paris. www.zoosystema.com 267 Peña Cantero Á. L. & Vervoort W. INTRODUCTION al. (2007), only records based on data with enough characteristics to be recognized from literature have Th e present study deals with the species of Acrypto- been included. laria Norman, 1875 present in the huge hydroid Holotypes and much of the remaining mate- collection resulting from several French expeditions rial is preserved in the collections of the Muséum in the western Pacifi c, mostly in the New Caledonian national d’Histoire naturelle, Paris (MNHN). area; a few samples are from the Philippines area. Additional material, including paratypes, is in Th is genus appears to be extremely diverse in this the National Museum of Natural History, Leiden area. According to Peña Cantero et al. (2007) (RMNH) and in the Museo de Ciencias Naturales there are 16 known species of Acryptolaria in the of Madrid (MNCN). Th e collection numbers are world. We found a total of 29 species, 19 of which given in the paragraph Material examined of the are considered new to science, thus doubling the species descriptions. number of known species to 35. Formerly identifi cation of the species of Acrypto- laria proved to be a diffi cult task. Although the SYSTEMATICS genus can be easily recognized amongst benthic Hydrozoa, both paucity of characters for species Family LAFOEIDAE Hincks, 1868 diff erentiation and poor original descriptions of many nomimal species made identifi cations at the Genus Acryptolaria Norman, 1875 species level almost impossible. To alleviate this situation, Peña Cantero et al. (2007) carried out Acryptolaria Norman, 1875: 172, pl. 12 fi gs 1, 2. a revision of the genus, redescribing most of the Scapus Norman, 1875: 173, pl. 12 fi gs 1, 3 (type species: known species, based on the study of their type Scapus tubulifer Norman, 1875). specimens, including new fi gures and information Oswaldaria Stechow, 1921: 30 (type species: Cryptolaria concerning the cnidome, which resulted in a useful crassicaulis Allman, 1888). tool for species identifi cation. Peña Cantero et al. (2007) also realised that it was TYPE SPECIES. — Acryptolaria andersoni Totton, 1930. impossible to confi rm many of the previous iden- DIAGNOSIS. — Lafoeidae with adult colonies consisting tifi cations, unless the voucher specimens could be of branched, polysiphonic, erect stems with a main, studied, because of the lack of cnidome information hydrothecate central axial tube and a series of accom- and, in general, the poor descriptions and fi gures. panying accessory tubes. Branches also polysiphonic, In spite of this, they considered all those records originating from secondary tubes. Polysiphony decreasing in a fi nal appendix to stimulate future studies of distally, but almost reaching distal end. Hydrothecae only present on main axis of stem and branches. Hydrothecae the genus Acryptolaria. alternately arranged, forming two longitudinal rows (with the exception of A. tetraseriata n. sp.), usually in one plane. Hydrotheca tubiform, partially adnate MATERIAL AND METHODS to branch; without diaphragm. Nematothecae absent. Gonothecae aggregated to form a coppinia, with or without defensive tubes. Gonophores fi xed sporosacs. Information concerning the species examined and Cnidome consisting of two categories of nematocysts: collecting stations has been summarized in Table 1. large putative macrobasic mastigophores and small Th e bathymetric range of the samples studied is putative microbasic mastigophores. between depths of 92 and 1470 m; most samples are from bathyal depths. REMARKS Th e material was examined, measured and drawn For a wider discussion on the genus see Peña Cantero with a compound microscope and a stereomicro- et al. (2007). Th ese authors completely redescribed scope. Measurements of nematocysts were made the type specimens of the known species, with on undischarged capsules. As in Peña Cantero et the exception of A. andersoni and A. rectangularis 268 ZOOSYSTEMA • 2010 • 32 (2) Western Pacifi c Acryptolaria (Cnidaria, Hydrozoa, Lafoeidae) (Jarvis, 1922), for which no type material could DESCRIPTION OF THE SPECIES be located; it is probably lost. According to Peña Cantero et al. (2007) the genus after their revision Acryptolaria angulata (Bale, 1914) included 16 valid species. However, A. andersoni, (Figs 1; 30; 31A; Table 2) type species of the genus, and A. rectangularis are insuffi ciently known, although the coppinia of Cryptolaria angulata Bale, 1914: 166, 167, pl. 35, fi g. 1; the former, that was mistakenly described as a 1915: 251. — Stranks 1993: 7. new species of hydroid (Scapus tubulifer Norman, Acryptolaria angulata – Schuchert 2003: 155, 156, 1875), is known. fi g. 14. — Peña Cantero et al. 2007: 235-237, fi gs 2, 17B; tab. II. SPECIES INCLUDED Not Acryptolaria angulata – Vervoort 1966: 116, 117, A list of species originally referred to Acryptolaria fi g. 16 [= ?A. rectangularis (Jarvis, 1922)] is given by Peña Cantero et al. (2007); they also list the species that actually belong to other gen- Not Acryptolaria angulata – Hirohito 1995: 102, text-fi g. era of Lafoeidae, as Cryptolaria, Grammaria or 29a, b, pl. 6 fi g. B [= ?A. bulbosa (Stechow, 1932)] Zygophylax. MATERIAL EXAMINED. — Loyalty Islands. BIOCAL Below we list all presently known species of Acry- 1, stn CP 84, 20°43.498’-20°42.948’S, 167°00.278’- ptolaria (in bold those found in the present study): 167°01.500’E, 210-150 m, 6.IX.1985, 5 stems up to Acryptolaria abies (Allman, 1877) 40 mm high with coppinia (MNHN-Hy.2009-0176); Acryptolaria andersoni Totton, 1930 2 slides (MNHN-Hy.2009-0144 & RMNH-Coel. no. Acryptolaria angulata (Bale, 1914) 37468, slide 288 with fragments up to 17 mm long). Acryptolaria bathyalis n. sp. BIOGEOCAL, stn DW 292, 20°28.23’-20°28.18’S, Acryptolaria bulbosa (Stechow, 1932) 166°48.45’-166°48.48’E, 470-465 m, 27.IV.1987, a Acryptolaria conferta (Allman, 1877) few stems up to 12 mm high (slide MNHN-Hy.2009- Acryptolaria corniformis Naumov & Stepanjants, 1962 0145). Acryptolaria crassicaulis (Allman, 1888) MUSORSTOM 6, stn DW 399, 20°41.80’S, 167°00.20’E, Acryptolaria disordinata n. sp. 282 m, 14.II.1989, 1 stem c. 30 mm high (RMNH-Coel. Acryptolaria encarnae n. sp. no. 31494); 1 stem c. 23 mm high (RMNH-Coel. Acryptolaria fl abelloides n. sp. no. 35101, slide 662). — Stn DW 474, 21°08.80’S, Acryptolaria fl abellum (Allman, 1888) 167°55.50’E, 260 m, 22.II.1989, 5 stems up to 20 mm high Acryptolaria gemini n. sp. (MNHN-Hy.2009-0177). — Stn DW 487, 21°23.30’S, Acryptolaria gracilis (Allman, 1888) 167°46.40’E, 500 m, 23.II.1989, several stems up to Acryptolaria infi nita n. sp. 25 mm high, on coral (MNHN-Hy.2009-0178); 1 stem c. Acryptolaria intermedia n. sp. 33 mm high in slide (MNHN-Hy.2009-0146). — Stn DW Acryptolaria inversa n. sp. 489, 20°48.37’S, 167°05.86’E, 700 m, 24.II.1989, 1 stem Acryptolaria laertesi n. sp. c. 62 mm high, with coppinia (MNCN 2.03/402). Acryptolaria longitheca (Allman, 1877) Norfolk Ridge. BIOCAL 1, stn DW 36, 23°08.647’- Acryptolaria medeae n. sp. 23°08.900’S, 167°10.994’-167°11.296’E, 650-680 m, Acryptolaria minima Totton, 1930 29.VIII.1985, 3 stems up to 12 mm high, on coral Acryptolaria minuta Watson, 2003 (RMNH-Coel. no 31495). — Stn DW 44, 22°47.300’- Acryptolaria niobae n.
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