Abelbolla maemulensis
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Ordo: Enoplida
Familia: Enchelidiidae
Genus: Abelbolla
Name
Abelbolla maemulensis Hong, Ho, 2014 – Wikispecies link – Pensoft Profile
- Abelbolla maemulensis Hong, Ho, 2014, Zootaxa 3785: 422-424.
Materials Examined
Type locality. Station SE06: sub-tidal South-east of Maemul Island (34 ˚ 35 ΄ 40 ˝ N, 128 ˚ 45 ΄ 13 ˝ E), at a depth of 77 m, in muddy sediment. Additional locality. Station SE 19: sub-tidal South-west of Maemul Island (34 ˚ 34 ΄ 46 ˝ N, 128 ˚ 25 ΄ 1 ˝ E), at a depth of 49 m, in muddy sediment. Type material.Holotype: one male NIBRIV0000282455, collected by Hyeonggeun Kim and Kichoon Kim, at station SE 19 in December 2010, from Research Vessel Tam-Gu 7. Paratype: two males NIBRIV0000282456 and NIBRIV0000282457, collected by Hyeonggeun Kim and Kichoon Kim, at station SE 19 in December 2010, from Research Vessel Tam-Gu 7; and two females NIBRIV0000282458 and NIBRIV0000282459, collected by Hyeonggeun Kim and Kichoon Kim, at station SE06 in December 2010, from Research Vessel Tam-Gu 7
Description
Measurements. See Table 1 for detailed measurements and morphometric ratios. Description.Male holotype. Habitus tubular and slender, strongly narrowed anteriorly. Cuticle smooth. Body diameter increases steadily from anterior end to base of pharynx then does not change to cloaca. Tail conicocylindrical. Six outer labial sensilla small, with papillae form. Ten cephalic setae (4 µm) located about 0.5 hd from anterior end in one circle. Circular amphid with elongated corpus gelatum, diameter of amphid 4 µm, about 0.5 hd, located about 0.3 hd from anterior end. Anterior ten cervical setae about 9 µm long, located about 2.0 hd from anterior end in one circle. Other cervical setae (about 5 µm long) arranged irregularly. Buccal cavity (8 µm long and 5 µm wide) in two parts with circular ring (with no denticles) separating two buccal chambers and with three unequal teeth of which one right subventral tooth (about 4 µm long) is largest. Pharynx expanding gradually and muscular along its entire length, without posterior bulbs. Nerve ring at 50 % pharynx length. Reproductive system diorchic, testes outstretched, anterior testis located 775 µm and posterior testis located 465 µm from the cloaca. Spicules paired, equal and arcuate, with a hook at the distal end, 63 µm long as arc (1.9 abd), 46 µm long as chord (1.4 abd). Gubernaculum with dorso–caudally directed apophysis, with swollen distal tip, 26 µm long (0.8 abd). Two winged precloacal supplements observed, anterior supplement (total length of anterior supplement, 0.8 abd) located 223 µm and posterior supplement (0.8 abd) located 162 µm from the cloaca. Tail 4.3 abd long with terminal setae (about 5–6 µm, more than eight). Female paratypes. Similar to male, except body larger and longer than male (females average 1,921 µm long and 45 µm wide). Vulva at 56 % of body of length. Didelphic, outstretched ovaries, anterior ovary 197 µm, posterior 231 µm long. Supplements absent.
Etymology
Etymology. The species name refers to the sampling location, specifically the Maemul Island, from which the nematode was collected.
Diagnosis
Diagnosis and remarks.Abelbolla maemulensis sp. nov. is unique within the genus, being the only species so far described which has circular amphids and a complex structure of the gubernacular apophysis. It is similar to A. huanghaiensis, described from the Yellow Sea, having similar spicule lengths and, spicule shape. Also, it is one of the shortest Abelbolla species so far described. With respect to the de Man’s ratios A. maemulensis sp. nov. differs from a (39.3vs47.9; 48.9; 39.5) and c (10.0 vs11.2; 12.8; 17.2) for A. boucheri, A. huanghaiensis and A. warwicki, but b (3.4vs 4.0; 3.6; 3.4) is quite similar to the ratios of the other species (Table 2).
Characters♂ Holotype ♂ 2♂ 3♂ Ave.♀ 1♀ 2♀ Ave.L1535 1413 1532 1493 1710 2131 1921mbd39 37 38 38 42 49 45hd7 8 7 7 8 11 10bcl8 9 9 9 10 13 12bcw5 6 5 5 5 8 7cep4 6 5 5 5 6 6AL2 2 1 2 4n/a4amp4 5 4 4 4n/a4amp cbd8 7 8 8 8n/a8cer9 9 9 9 7 7 7NL201 238 239 226 247 248 247N cbd28 32 32 31 28 31 30N%50.1 52.0 50.0 50.7 50.7 37.2 43.9PL401 458 478 446 487 666 577P cbd38 37 36 37 37 46 42abd33 33 34 33 22 25 23TL142 148 158 149 146 149 148c'4.30 4.48 4.65 4.48 6.79 5.86 6.32spic46 44 50 47n/a n/a n/a spia63 65 73 67n/a n/a n/a s1.91 1.97 2.15 2.01n/a n/a n/a VL n/a n/a n/a n/a934 1235 1085V cbd n/a n/a n/a n/a42 49 45V%n/a n/a n/a n/a54.6 58.0 56.3gub26 28 29 28n/a n/a n/a psw10 9 7 9n/a n/a n/a psm5 5 5 5n/a n/a n/a ps25 21 18 21n/a n/a n/a asw10 9 6 8n/a n/a n/a asm5 5 5 5n/a n/a n/a as25 23 14 21n/a n/a n/a dps162 132 119 138n/a n/a n/a dbs61 95 53 70n/a n/a n/a at775 733 686 731n/a n/a n/a pt465 528 486 493n/a n/a n/a a39.36 38.34 40.32 39.34 40.71 43.56 42.14b3.83 3.09 3.21 3.37 3.51 3.20 3.36c10.81 9.55 9.70 10.02 11.71 14.27 12.99d1.55 1.75 1.71 1.67 1.59 1.62 1.60 TABLE2. Comparative data table of the measurements for published and new species of Abelbolla. All measurements in µm unless otherwise stated, except ratio a, b, c, c’, d, s. Data presented are mean values, unless n = 1. Literature source: a Huang & Zhang 2004. n/a: not applicable; n/f: not in figure. A. boucheri a A. huanghaiensis a A. warwicki a A. maemulensis Characters ♂ ♀ ♂ ♀ ♂ ♀ ♂ ♀ (n = 4) (n = 2) (n = 4) (n = 3) (n = 3) / (n = 3) (n = 2)
Taxon Treatment
- Hong, Ho; Lee, Wonchoel; 2014: Two new species of free-living marine nematodes (Nematoda: Oncholaimida: Enchelidiidae) from Maemul Island, Korea, Zootaxa 3785: 422-424. doi
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