Species of the snake eel genus Yirrkala Whitley, 1940 from Taiwan, with descriptions of a new species and two new records (Anguilliformes, Ophichthidae) Author Hibino, Yusuke 0000-0002-5670-3851 Kitakyushu Museum of Natural History and Human History, Fukuoka 805 - 0071, Japan Author Ho, Hsuan-Ching 0000-0003-1154-601X Department and Graduate Institute of Aquaculture, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan & Australian Museum, Sydney 2010, Australia text ZooKeys 2024 2024-12-09 1220 45 62 journal article 306281 10.3897/zookeys.1220.130885 62e89788-eb92-496a-b999-8e9e77d835a8 7A7FE0E0-7BAA-4DB2-8061-A51BE183924F

Table 1. Counts and measurements of three Yirrkala species newly collected from Taiwan, with type information.

	Y. nkust sp. nov.		Y. kaupii		Y. omanensis
	Holotype	Paratypes	Present materials	Holotype	Present material	Holotype
Body depths in parentheses are possibly the maximum depth. a from Bleeker (1858); b from Norman (1939); c from McCosker (2022); and d estimated from Norman (1939).
Total length (mm)	496	297–462 (n = 3)	238–331 (n = 3)	342	216	230 b
As % of TL
Head length	5.9	6.2–6.4	7.3–8.4	6.5 a	8.1	7.7 b
Preanal length	51.9	47.4–52.6	47.1–47.3	N / A	57.9	58.3 c
Tail length	48.1	47.4–52.6	52.7–52.9	N / A	42.1	41.7 c
Predorsal length	5.1	5.5–6.1	12.5–13.5	N / A	59.8	ca 59 d
Body depth at gill opening	1.7	1.6–1.8	2.1–2.4	(1.7) a	2.3	(1.8) c
Body width at gill opening	1.5	1.5–1.6	1.4–1.7	N / A	2.1	N / A
Body depth at midanus	1.7	1.3–1.5	2.4–2.5	N / A	2.1	N / A
Body width at midanus	1.6	1.4–1.6	1.5–2.1	N / A	2.0	N / A
As % of head length
Snout length	15.1	14.7–16.5	13.9–14.5	ca 16 a	11.4	ca 11 b
Eye diameter	4.5	3.6–4.5	6.1–6.5	ca 8 a	5.7	N / A
Upper-jaw length	28.0	28.0–30.9	22.4–23.4	ca 25 a	28.6	N / A
Gill-opening length	12.7	11.4–15.7	8.2–13.4	N / A	9.7	N / A
Interorbital width	7.9	6.6–9.8	6.5–8.2	N / A	5.1	N / A
Isthmus width	5.1	3.9–5.5	8.5–15.6	N / A	6.9	N / A
Counts
Predorsal vertebrae	8	7–8	17–18	17	78	76
Preanal vertebrae	72	72–75	64–66	65	76	76
Total vertebrae	147	150–152	151–155	156	141	140