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Table 3 Morphometric data of four Neenchelys species, expressed as percentage of total length, trunk length, and head length

From: Revision of the worm eel genus Neenchelys (Ophichthidae: Myrophinae), with descriptions of three new species from the western Pacific Ocean

  N. microtretus N. parvipectoralis N. pelagica sp. nov. N. similis sp. nov.
Holotype n = 16 Holotype Types (n = 3) Holotype Types (n = 4)
Total length (mm) 183 163-302 392 327-392 677 580-756
% Total length   Mean (range) SD   Mean (range)   Mean (range)
 Head length 10.9 10.7 (10.1-11.3) 0.3 10 10.0 (9.8-10.2) 6.1 6.4 (6.1-6.6)
 Predorsal length 19.1 16.7 (15.7-17.5) 0.6 22.4 22.2 (20.8-23.3) 14 14.0 (12.9-14.8)
 Trunk length 31.1 32.1 (30.6-34.0) 1.1 23.9 24.0 (23.1-25.0) 21.4 21.2 (20.7-21.8)
 Preanal length 42.1 43.1 (41.4-44.4) 1 33.9 34.0 (33.3-34.8) 28.1 27.7 (26.7-28.3)
 Tail length 57.9 57.5 (55.6-62.9) 1.8 66.1 66.2 (65.7-66.7) 72.4 72.4 (72.4-72.9)
% Trunk length        
 Gill opening to dorsal fin origin 26.3 19.3 (15.3-22.3) 1.9 52 50.6 (45.8-54.0) 36.9 36.1 (31.6-38.6)
% Head length        
 Pectoral fin length - 2.7 (1.4-4.2) 1.1 22.9 23.6 (21.6-26.2) 26.0 25.0 (24.0-26.0)
 Snout length 17.5 15.5 (13.8-17.5) 1 18.1 17.9 (17.4-18.1) 18.3 17.2 (15.6-17.5)
 Eye diameter 5 6.2 (5.0-7.1) 0.5 7.4 6.6 (6.1-7.4) 5.3 5.4 (4.9-5.9)
 Upper jaw length 27.5 27.7 (24.1-30.8) 2.1 28.2 28.3 (27.7-29.1) 28.9 30.1 (27.2-32.8)
 Interorbital width - 11.3 (8.0-13.1) 1.4 13 12.4 (12.0-13.0) 9.2 7.7 (6.3-9.2)
 Postorbital length - 79.6 (74.7-86.1) 3.7 74.3 75.4 (70.3-81.7) 81.9 79.3 (77.2-81.9)
 Gill opening height - 10.0 (6.7-13.5) 1.6 7.9 7.3 (6.6-7.9) 8.2 6.8 (5.2-8.2)
 Depth at head 35 37.8 (33.5-41.7) 2.5 35.9 32.3 (30.3-35.9) 34.9 31.7 (29.7-34.9)
 Depth at anus - 38.8 (31.6-44.0) 3.8 36.1 33.6 (32.1-36.1) 37.8 35.0 (32.9-35.4)
 Width at anus - 29.1 (24.1-34.6) 2.5 32.3 29.7 (26.7-30.0) 24.8 24.7 (22.9-28.0)