Abstract
Dendronotus regius sp. nov. and Dendronotus noahi sp. nov. are the first two species of the genus Dendronotus Alder & Hancock described from tropical western Pacific waters. Both have unique color patterns as well as radulae that are distinct from other known species of the genus. Dendronotus regius sp. nov. is recorded from Indonesia, the Philippines and Malaysia while Dendronotus noahi sp. nov. is found in Papua New Guinea. Along with these descriptions, new data on D. gracilis Baba, 1949 are given to provide supplemental information on its morphology and report an increase in its range to include the tropical waters of Okinawa, Japan. A comparative table as well as scanning electron micrographs for almost all recognized species is also provided.
References
Ascanius, P. (1774) Beskrivelse over en Norske sneppe og et sødyr. Det Kongelige NorskeVidenskabernes Selskabs Skrifter, Trondhjem 5, 153–158, plate 5.
Baba, K. (1949) Opisthobranchia of Sagami Bay. Iwanami Shoten, Tokyo, 194 pp., 50 pls.
Bergh, L.S.R. (1879) On the nudibranchiate gasteropod Mollusca of the North Pacific Ocean, with special reference to those of Alaska, part 1. Proceedings of the Academy of Natural Sciences Philadelphia, 31, 71–132, plates 1–8.
Cooper, J.G. (1863) On new or rare Mollusca inhabiting the coast of California. No. II. Proceedings of the California Academy of Natural Sciences, 3, 56–60.
Dotulong, H. (2006) Re: Dendronotus? from Java Sea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=15362 (11 December 2006), (accessed: 22 October 2008).
Grall, S. (2008) Dendronotus from Sabah, Malaysia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=21909 (2 October 2008), (accessed: 27 October 2008).
Huang, F.W. (2007) Dendronotus from Bali. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=19490 (29 June 2007), (accessed: 22 October 2008).
Izumi, R. (2007) Dendronotus? from Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=18994 (29 June 2007), (accessed: 22 October 2008).
Kodiat, E. (2005) Dendronotus? from Java Sea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=12692 (9 February 2005), (accessed: 22 October 2008).
MacFarland, F.M. (1966) Studies on Opisthobranchiate Mollusks of the Pacific Coast of North America. Memoirs of the California Academy of Science, 6, 1–546, plates 1–72.
Marcus, Ev. and Er. Marcus. (1967) American opisthobranch mollusks Part I, Tropical American opisthobranchs, Part II, Opisthobranchs from the Gulf of California. Studies in Tropical Oceanography, Miami, 6, 1–256.
O'Donoghue, C.H. (1921) Nudibranchiate Mollusca from the Vancouver Island region. Transactions of the Royal Canadian Institute, 13, 147–209, plates 7–11 [1–5].
Robilliard, G.A. (1970) The systematics and some aspects of the ecology of the genus Dendronotus. The Veliger, 12, 433–479.
Robilliard, G.A. (1972) A new species of Dendronotus from the northeastern Pacific with notes on Dendronotus nanus and Dendronotus robustus (Mollusca: Opisthobranchia). Canadian Journal of Zoology, 50, 421–432.
Rudman, W.B. (2000) Dendronotus sp? [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from: http://www.seaslugforum.net/factsheet.cfm?base=dendron (22 March 2000), (accessed: 22 October 2008).
Rudman, W.B. (2001) Comment on Bornella? sp. from Okinawa by Bob Bolland. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=5221 (11 September 2001), (accessed: 22 October 2008).
Thollesson, M. (1998) Discrimination of two Dendronotus species by allozyme electrophoresis and the reinstatement of Dendronotus lacteus (Thompson, 1840) (Nudibranchia, Dendronotoidea). Zoologica Scripta, 27, 189–195.
Thompson, W. (1840) Contributions towards a knowledge of the Mollusca Nudibranchia and Mollusca Tunicata of Ireland, with descriptions of some apparently new species of Invertebrata. Annals & Magazine of Natural History, 5, 84–102, plate 2.
Tomeno, V. (2006) Dendronotus sp. from Bali. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=18943 (11 December 2006), (accessed: 22 October 2008).
Valdés, Á. and Bouchet, P. (1998) Naked in toxic fluids: a nudibranch mollusk from hydrothermal vents. Deep Sea Research II, 45, 319–327.
Verrill, A.E. (1870) Contributions to zoology from the Museum of Yale College. No.8.—Descriptions of some New England Nudibranchiata. American Journal of Science & Arts, series 2, 50(150), 405–408.
Warren, L. (1998) Possible Dendronotus? [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=162 (9 April 1998), (accessed: 22 October 2008).
Warren, L. (2000) Dendronotus? from Sulawesi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find.cfm?id=2136 (22 March 2000), (accessed: 22 October 2008).