Taxonomic revision on the Gobio group in the Yellow River drainage, with discussion on the validity of the genus Acanthogobio (Cypriniformes, Gobionidae) Author Fang, Yutian https://orcid.org/0009-0008-5347-9250 State Key Laboratory of Animal Biodiversity Conservation and Integrated Pest Management, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China & University of Chinese Academy of Sciences, Beijing, China Author Sun, Zhixian 0000-0003-0565-2801 State Key Laboratory of Animal Biodiversity Conservation and Integrated Pest Management, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China & Shanghai Universities Key Laboratory of Marine Animal Taxonomy and Evolution, Shanghai Ocean University, Shanghai, 201306, China Author Zhao, Yahui 0000-0002-4615-596X State Key Laboratory of Animal Biodiversity Conservation and Integrated Pest Management, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China text Zoosystematics and Evolution 2025 2025-03-25 101 2 661 679 journal article 308803 10.3897/zse.101.144134 ba5e7e4c-6710-44c8-933c-ef535b168385 72D44F7D-13D3-4AFA-A57E-B11B2175A6F3

Table 2. Morphometric measurements of Gobio species in the Yellow River drainage.

Characters	Gobio huanghensis (n = 17)			Gobio tchangi (n = 6)				Gobio rivuloides (n = 10)
				Holotype	Holotype + Other Specimens
	Range	Mean	SD		Range	Mean	SD	Range	Mean	SD
Dorsal-fin rays	7	7		7	7	7		7	7
Anal-fin rays	6	6		6	6	6		6–7	6
Pectoral-fin rays	13–14	14		14	13–14	14		13–14	14
Pelvic-fin rays	7	7		7	7	7		7	7
Lateral line scales	42–44	43		43	41–43	42		40–43	42
Scales above lateral line	6–7.5	6.5		6.5	6–6.5	6.5		5.5–7.5	6
Scales below lateral line	3–4	4		4	4	4		3–4	3
Circumpeduncular scales	14–16	16		14	14–16	16		14–16	14
SL (mm)	64.7–128.9			152.8	115.6–157.6			66.9–119.2
In percent of SL
Body depth	18.0–24.1	21.2	1.7	21.0	16.5–21.0	18.8	1.8	19.0–22.8	20.5	1.5
Dorsal-fin base length	13.0–15.7	14.3	0.7	13.9	13.8–15.2	14.4	0.6	13.5–15.1	14.5	0.5
Pectoral-fin base length	4.2–5.8	5.2	0.5	6.4	4.8–6.4	5.8	0.6	4.5–6.6	5.7	0.6
Pelvic-fin base length	3.9–5.7	4.7	0.6	5.1	4.4–5.1	4.7	0.3	3.9–5.6	4.8	0.6
Anal-fin base length	9.1–10.5	9.9	0.4	10.8	10.2–11.5	10.7	0.4	8.6–10.8	9.3	0.7
Pre-dorsal length	43.8–48.7	46.8	1.5	45.9	44.9–46.3	45.9	0.5	41.7–49.9	45.8	2.6
Pre-pectoral length	23.7–25.6	24.5	0.6	23.3	23.3–25.1	24.0	0.7	23.3–33.7	25.8	2.9
Pre-pelvic length	47.1–51.2	48.7	1.1	48.3	47.2–50.3	48.7	1.3	45.2–51.1	48.1	1.8
Pre-anal length	68.8–73.8	71.5	1.3	71.1	70.2–73.5	71.4	1.5	69.7–73.4	71.2	1.1
Post-dorsal length	52.7–58.5	56.8	1.3	56.4	55.8–58.8	57.0	1.0	54.1–62.0	57.7	2.8
Caudal peduncle length	18.8–22.1	20.0	0.8	19.0	18.3–19.6	19.1	0.5	22.3–17.8	20.2	1.5
Caudal peduncle depth	9.0–12.2	9.9	0.7	9.8	8.8–9.8	9.1	0.4	8.3–11.5	9.6	1.0
Head length (mm)	16.4–32.0			36.1	27.7–36.7			16.9–27.5
In percent of HL
Head depth	53.0–62.6	55.7	2.7	59.9	54.1–62.2	57.6	3.1	55.7–62.4	58.7	2.1
Head width	53.4–64.1	59.9	3.3	61.9	53.2–70.3	60.3	6.1	58.8–65.3	62.4	2.2
Eye diameter	20.8–27.0	23.3	1.8	20.4	19.8–22.3	21.1	0.9	24.7–32.1	27.6	2.1
Interorbital width	20.4–27.1	23.3	1.7	22.7	21.9–24.5	23.2	1.0	18.4–24.7	21.9	1.9
Snout length	34.8–46.6	41.2	3.2	43.6	39.4–43.6	42.1	1.4	33.4–39.4	35.6	1.7
Barbel length	41.3–57.1	47.3	4.7	45.3	45.3–58.2	51.5	4.3	31.8–39.9	36.3	2.9
	Gobio meridionalis (n = 24)						Gobio coriparoides (n = 15)			Gobio guentheri (n = 11)
	Paratypes (n = 6)			Other specimens (n = 18)
	Range	Mean	SD	Range	Mean	SD	Range	Mean	SD	Range	Mean	SD
Dorsal-fin rays	7	7		7	7		7	7		7	7
Anal-fin rays	6	6		6	6		6	6		6	6
Pectoral-fin rays	14–15	14		13–15	13		14–15	14		14–15	15
Pelvic-fin rays	7	7		7	7		7	7		7	7
Lateral line scales	40–42	42		41–43	42		39–41	40		40–43	42
Scales above lateral line	5.5	5.5		5.5	5.5		6.5–7.5	6.5		5–8	7
Scales below lateral line	3	3		2–3	3		4–5	4		4	4
Circumpeduncular scales	12	12		12–14	12		16–18	18		20–24	20
SL (mm)	60.0–88.6			72.1–109.1			60.0–81.8			69.0–143.4
In percent of SL
Body depth	17.7–21.8	19.4	1.5	18.6–22.5	20.6	1.1	22.6–26.8	25.5	1.2	21.4–30.1	26.5	2.6
Dorsal-fin base length	12.7–15.2	13.8	0.9	13.4–15.1	14.2	0.4	13.1–16.1	14.9	1.0	14.0–16.7	15.2	0.7
Pectoral-fin base length	5.2–6.9	6.2	0.7	4.9–6.3	5.6	0.4	4.8–6.9	5.7	0.6	5.5–7.1	6.2	0.5
Pelvic-fin base length	3.8–5.7	4.6	0.6	4.3–5.6	5.0	0.3	4.3–6.1	5.3	0.5	5.3–7.3	6.0	0.6
Anal-fin base length	8.1–9.7	8.9	0.7	8.6–9.9	9.3	0.4	9.1–11.2	10.1	0.6	9.3–11.3	10.3	0.6
Pre-dorsal length	42.5–46.3	44.5	1.2	42.8–46.7	44.1	0.9	44.8–48.6	46.7	1.2	45.7–49.6	47.8	1.1
Pre-pectoral length	23.8–27.1	25.6	1.2	22.0–25.3	23.7	0.8	24.3–27.3	25.7	0.9	24.3–27.4	25.6	0.9
Pre-pelvic length	47.4–50.9	49.3	1.2	47.4–50.6	49.1	1.0	45.8–48.7	47.3	0.8	47.2–50.5	48.9	1.2
Pre-anal length	68.7–74.9	72.1	2.4	69.3–73.8	72.0	1.3	68.5–72.6	70.2	1.2	70.9–76.6	73.3	1.9
Post-dorsal length	55.5–58.8	56.7	1.2	56.4–61.7	58.3	1.2	55.5–58.3	56.7	0.9	53.7–57.8	56.0	1.3
Caudal peduncle length	15.6–19.7	18.1	1.4	17.9–21.3	19.7	0.9	18.0–23.7	21.0	1.3	17.3–20.9	19.3	1.1
Caudal peduncle depth	9.1–10.0	9.8	0.3	8.8–10.3	9.5	0.6	11.4–13.5	12.3	0.6	10.7–13.9	12.8	1.1
Head length (mm)	14.6–23.6			17.6–24.8			14.9–20.8			16.3–34.3
In percent of HL
Head depth	50.8–60.4	55.8	3.8	52.7–65.6	58.0	2.8	61.0–69.4	65.2	2.1	54.6–64.5	60.6	3.3
Head width	47.1–60.5	53.2	4.6	53.2–74.8	62.4	5.2	63.2–72.4	66.9	2.7	55.1–65.9	61.4	3.8
Eye diameter	20.9–26.4	24.4	2.3	23.7–29.1	25.7	1.3	24.6–29.3	27.0	1.4	22.1–28.6	24.5	2.1
Interorbital width	24.4–29.6	27.2	2.0	23.5–29.3	26.1	1.4	24.0–32.6	29.9	2.2	24.9–30.4	27.3	2.2
Snout length	35.1–43.2	38.3	3.9	31.9–37.7	34.4	1.6	27.6–33.6	30.4	1.7	29.9–36.9	34.2	2.3
Barbel length				31.1–39.5	35.5	2.3	30.4–41.2	35.7	3.4	53.3–89.4	72.1	10.7