Stolephorus falco sp. nov. (Teleostei, Clupeiformes, Engraulidae), a new anchovy from Sumatra, Indonesia Author Hata, Harutaka 0000-0002-6996-3628 Macroevolution Unit, Okinawa Institute of Science and Technology, 1919 - 1 Tancha, Onna-son, Kunigami-gun, Okinawa 904 - 0495, Japan Author Sallan, Lauren 0000-0002-4441-1456 Macroevolution Unit, Okinawa Institute of Science and Technology, 1919 - 1 Tancha, Onna-son, Kunigami-gun, Okinawa 904 - 0495, Japan Author Motomura, Hiroyuki 0000-0002-7448-2482 The Kagoshima University Museum, 1 - 21 - 30 Korimoto, Kagoshima 890 - 0065, Japan text ZooKeys 2026 2026-02-25 1270 255 268 journal article 314307 10.3897/zookeys.1270.175032 cdb06ce8-ef8d-4bd7-ba43-1b60b6111ff5 8322C12D-6E1A-4F0C-A6DF-62D4D2108FB5

Table 2. Morphometrics of specimens of Stolephorus falco sp. nov.

	Holotype	Paratypes
	ZMH 28689	ZMH 28749	KAUM –I.220780
Abbreviations: D – P 1: distance from dorsal-fin origin to pectoral-fin insertion; D – P 2: distance from dorsal-fin origin to pelvic-fin insertion; D – A: distance between origins of dorsal and anal fins; P 1 – P 2: distance between insertions of pectoral and pelvic fins; P 2 – A: distance from pelvic-fin insertion to anal-fin origin.
Standard length (mm; SL)	58.8	63.3	58.4
As % of SL
Head length	26.9	26.3	27.5
Body depth	28.8	28.9	28.9
Pre-dorsal fin length	56.0	56.2	55.8
Snout tip to pectoral-fin insertion	28.3	28.3	28.5
Snout tip to pelvic-fin insertion	46.4	45.6	45.3
Snout tip to anal-fin origin	66.4	63.5	63.7
Dorsal-fin base length	13.5	13.7	14.3
Anal-fin base length	20.7	22.2	23.5
Caudal-peduncle length	18.2	17.7	16.9
Caudal-peduncle depth	12.6	12.2	13.7
D – P 1	38.8	37.7	36.6
D – P 2	30.7	29.6	30.5
D – A	29.7	29.3	29.9
P 1 – P 2	20.4	18.6	18.1
P 2 – A	20.9	19.2	18.7
Pectoral-fin length	18.8	17.7	19.3
Pelvic-fin length	12.0	11.9	12.2
Orbit diameter	8.4	8.2	7.9
Eye diameter	7.3	7.3	7.2
Snout length	3.5	3.2	3.1
Interorbital length	6.5	6.2	6.5
Maxilla length	23.5	damaged	22.8
Mandibular length	18.2	18.2	18.0
Supramaxilla end to maxilla end	6.9	damaged	5.8
Postorbital length	15.8	15.2	16.2