Abstract
A new species of free-living marine draconematid nematode, Dracograllus trukensis sp. nov., is described based on the specimens collected from the sediments of a intertidal seagrass bed from Chuuk Islands, Micronesia. Dracograllus trukensis sp. nov. differs from other species of the genus by the combination of the following characteristics: the presence of numerous minute spiny ornamented body cuticular annules in both sexes, eight cephalic adhesion tubes inserted on the head capsule in both sexes, the presence of stiff posteriorly directed setae anterior to posterior adhesion tubes in both sexes, the shape (large, elongated, open loop-shaped in male and large, elongated, closed loop-shaped in female) and position (longer ventral arm extending to the first body annule in male) of amphideal fovea, shorter spicule length (34–42 μm), the presence of sexual dimorphism in shape and length of the non-annulated tail terminus, and number of posterior sublateral adhesion tubes (10 in male and 13–15 in female) and posterior subventral adhesion tubes (8–10 in male and 9–11 in female). A comparative table on the biogeographical and ecological characteristics of the species of Dracograllus is presented. This is the first taxonomic report on the genus Dracograllus from Chuuk Islands, Micronesia, central western Pacific Ocean.
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References
Allen MW, Noffsinger EM (1978) A revision of the marine nematodes of the superfamily Draconematoidea Filipjev, 1918 (Nematoda: Draconematina). Univ Calif Publ Zool 109:1–133
Burgess R (2001) An improved protocol for separating meiofauna from sediments using colloidal silica sols. Mar Ecol-Prog Ser 214:161–165
Clasing E (1980) Post-embryonic development in species of Desmodoridae, Epsilonematidae and Draconematidae. Zool Anz 204:337–344
Decraemer W (1988) Dracograllus (Nematoda: Draconematidae) from Papua New Guinea, with descriptions of new species. Leopold III Biological Station, Laing Island - Contribution no. 158. Bull Inst R Sci Nat Belg Biol 58:5–27
Decraemer W (1989) Three new draconematid species from Papua New Guinea. Bull Inst R Sci Nat Belg Biol 59:5–24
Decraemer W, Gourbault N (1986) Marine nematodes from Guadeloupe and other Caribbean Islands. II. Draconematidae. Zool Scr 15:107–108
Decraemer W, Gourbault N, Backeljau T (1997) Marine nematodes of the family Draconematidae (Nemata): a synopsis with phylogenetic relationships. Hydrobiologia 357:185–202
de Man JG (1880) Die einheimischen, frei in der reinen Erde und im süssen Wasser lebenden Nematoden. Vorlaufiger Bericht und descriptiv-systematischer Theil. Tijdschr ned dierk Vereeniging 5:1–104
Gerlach SA (1952) Nematoden aus dem Küstengrundwasser. Abh Math-Naturwiss Kl Akad Wiss Lit Mainz 6:315–372
Inglis WG (1968) Interstitial nematodes from St. Vincent’s Bay, New-Caledonia. Expédition francaise sur les recifs coralliens de la Nouvelle Calédonie. Editions de la Fondation Singer-Polignac 2:29–74
Irwin-Smith VA (1918) On the Chaetosomatidae, with description of new species, and a new genus from the coast of New South Wales. Proc Linn Soc NSW 45:757–814
Kristensen RM (1989) Marine Tardigrada from the southeastern United States coastal waters I. Paradoxipus orzeliscoides n. gen., n. sp. (Arthrotardigrada: Halechiniscidae). Invertebr Biol 108:262–282
Leduc D, Zhao Z (2016) Phylogenetic relationships within the superfamily Desmodoroidea (Nematoda: Desmodorida), with descriptions of two new and one known species. Zool J Linn Soc-Lond 176:511–536
Rho HS, Decraemer W, Sørensen MV, Min WG, Jung JW, Kim W (2011) Megadraconema cornutum, a new genus and species from Korea, with a discussion of its classification and relationships within the family Draconematidae (Nematoda, Desmodorida) based on morphological and molecular characters. Zool Sci 28:68–84
Rho HS, Kim DS, Kim W (2006) Redescription of free-living marine nematode, Dracograllus filipjevi Allen and Noffsinger, 1978 (Nematoda: Draconematidae) from Korea. Ocean Sci J 41:163–173
Rho HS, Min WG (2011) Marine dragon nematodes. Invertebr Fauna Kor 13:1–101
Seinhorst JW (1959) A rapid method for the transfer of nematodes from fixative to anhydrous glycerin. Nematologica 4:67–69
Shirayama Y, Kaku T, Higgins RP (1993) Double-slided microscopic observation of meiofauna using an HS-slide. Benth Res 44:41–44
Verschelde D, Vincx M (1993) Draconematidae (Nematoda, Desmodoridoidea) from the coast of Kenya, East-Africa. Bull Inst R Sci Nat Belg Biol 63:35–53
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Min, W., Kim, D., Decraemer, W. et al. Dracograllus trukensis sp. nov. (Draconematidae: Nematoda) from a seagrass bed (Zostera spp.) in Chuuk Islands, Micronesia, Central Western Pacific Ocean. Ocean Sci. J. 51, 343–354 (2016). https://doi.org/10.1007/s12601-016-0030-z
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DOI: https://doi.org/10.1007/s12601-016-0030-z