Two new species of eelpout genus Lycenchelys (Perciformes: Zoarcidae) from the Kuril-Kamchatka Trench, based on morphological and molecular evidence Author Thiel, Ralf Independent researcher, Lübeck, Germany Author Knebelsberger, Thomas biome-id GbR, c / o Jade InnovationsZentrum, Emsstrasse 20, 26382 Wilhelmshaven, Germany Author Chernova, Natalia Zoological Institute of the Russian Academy of Sciences (ZIN), St. Petersburg, Russia Author Eidus, Irina Independent researcher, Lübeck, Germany & Independent researcher, Hamburg, Germany & Independent researcher, Lübeck, Germany text Zootaxa 2025 2025-02-04 5583 3 491 508 https://doi.org/10.11646/zootaxa.5583.3.4 journal article 308079 10.11646/zootaxa.5583.3.4 bbc18ba8-1833-41d8-9ac8-f7710730b029 1175-5326 14804545 EF57F9C7-5A67-4D21-AFCC-3FAD17249DDA

TABLE 1. Counts and measurements of Lycenchelys delanglei sp. nov.

Lycenchelys delanglei sp. nov.	Holotype ZMH 26277	Paratype ZMH 26278	Paratype ZMH 26279	Paratype ZMH 26280	Range
*No. epurals + on upper hypural plate + on lower hypural plate; **on upper limb + on lower limb.
Standard length (SL, mm)	196	157	157	199	157–199
Sex	Female	Female	Female	Male
Meristic characters
Dorsal-fin rays	115	117	115	114	114–117
Free pterygiophores at the beginning of dorsal fin	2	2	3	2	2–3
Anal-fin rays	96	98	97	98	96–98
Pectoral-fin rays	17	16	17	17	16–17
Pelvic-fin rays	2	2	2	2	2
Caudal-fin rays*	2+4+3	2+4+3	2+5+4	2+5+4	9–11
Gill rakers**	3+10	2+12	3+12	3+12	13–15
Precaudal vertebrae	28	29	28	29	28–29
Caudal vertebrae	93	92	93	91	91–93
Total vertebrae	121	121	121	120	120–121
Pseudobranch filaments	5	4	4	3	3–5
Nasal pores	2	2	2	2	2
Suborbital pores	11	10	12	10	10–12
Postorbital pores	4	4	4	4	4
Interorbital Pores	0	0	0	0	0
Preopercular pores	4	4	4	4	4
Mandibular pores	4+1	4+1	4+1	4+1	4+1
Occipital pores	0	0	0	0	0
Morphometric characters (%SL)
Head length (HL, mm)	37.0	27.3	26.8	34.7	26.8–37.0
Body height at pectoral-fin base	8.7	6.5	7.1	7.1	6.5–8.7
Body height at anal-fin origin	7.8	5.5	5.9	6.1	5.5–7.8
Predorsal length	22.0	22.8	19.6	20.7	19.6–22.8
Preanal length	38.0	37.5	37.5	39.3	37.5–39.3
Pectoral-fin length	11.1	9.2	10.6	9.0	9.0–11.1
Gill slit length	6.7	6.6	6.7	7.0	6.6–7.0
Morphometric characters (%HL)
Upper jaw length	29.2	31.5	31.7	28.5	28.5–31.7
Pectoral-fin length	58.6	52.7	62.3	51.9	51.9–62.3
Snout length	31.6	29.7	34.0	30.3	29.7–34.0
Eye diameter	19.2	19.8	20.5	21.0	19.2–21.0
Gill slit length	35.7	37.2	39.2	40.1	35.7–40.1
Interorbital width (bony margin)	4.6	4.8	4.5	4.9	4.5–4.9
Pelvic-fin length	13.2	17.2	17.2	12.1	12.1–17.2
Pectoral-fin base/length ratio	0.34	0.38	0.31	0.34	0.31–0.38