Chelon planiceps ( Valenciennes, 1836 )

Hasan, Ariba & Siddiqui, Pirzada Jamal Ahmed, 2020, Taxonomic study of the family Mugilidae from Pakistan coast (northern Arabian Sea), Zootaxa 4881 (1), pp. 131-151 : 145-149

Chelon planiceps ( Valenciennes, 1836)

(Figure: 14)

D1: IV; D2: 8 A: III, 9; Pc: 14–15; Pl: I, 5 L. S: 33–34; T .S: 11–13

Local name: Boi, Chhodi (Sin); Mundi (Bal)

FAO name: Tade mullet

Material examined. 7 specimens of 170–183 mm TL

Diagnosis. B ody depth at origin of first dorsal fin is 26–28 % of SL, 29–31% of SL at anal fin and 12% of SL at caudal peduncle. Head pointed, broad and dorsally depressed. Second spine of first dorsal fin is slightly larger than the first spine. Pectoral fin 20–21% of SL, 69–71 % of HL. Scale numbers: 33–34 in longitudinal series and 11–13 in transverse series

Description. Body elongated, quite slender, body depth is smaller than HL. Snout pointed, shorter than eye TABLE I . Morphometric data and meristic counts of six mullet species in two genera collected from the Pakistan coast.

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diameter. Adipose eye-fold developed moderately and covering almost entire iris. Terminal mouth, thin lips, lower lips directed forward. First dorsal fin origin is nearer to the base of caudal fin than to the snout tip. Second dorsal fin origin is at vertical behind one third or half of anal fin base. Dorsal and anal fins are relatively curved and basally scaled. Forked caudal fin. First pectoral fin has 14–15 spines reaching to the first dorsal fin origin. Axillary scale on pectoral fin is reduced. Scales Ctenoid.

Color. Dorsally olive or greenish brown, flanks silvery, ventrally whitish, upper scale rows with 5–7 indistinct longitudinal stripes. Light brown to greyish dorsal fin, yellowish pectoral fin, greyish to light blue caudal fin with black edges.

Distribution: Collected from Keti Bunder, Gwadar and Pasni.

Remarks. The distinctive character of C. planiceps is its pointed, depressed head. It is similar to L. subviridis and L.parsia in number of scale counts, well developed adipose tissue and number of fin rays.

Tables

TABLE I. (Continued

Parameters
Mugil cephalus	Ellochelon vaigiensis	Valamugil speigleri	Moolgarda perusii	Moolgarda seheli	Osteomugil engeli	Osteomugil cunnesius	Liza parsia	Planiliza subviridis		Planiliza melinopterus	Planiliza macrolepis	Planiliza kluzingeri	Chelon planiceps
Jugular space	15–19	15–16	16–20	17–18	14–17	16–20	15–18	17–19	16–22		15–20	19–21	20–21	19–21
1st Pre-dorsal distance	49–53	52–54	49	49–52	46–50	49–54	48–51	49–52	50–56		49–53	50–52	50	49–51
2nd Pre- dorsal distance	71–79	79–80	76–78	72–75	74–75	74–79	71–74	73–75	75–80		73–82	73–77	74–75	75–77
Pre-pectoral distance	24–30	25–28	29–32	28–32	27–29	28–33	27–29	27–28	27–32		26–32	31–33	30–31	31–32
Pre-pelvic distance	38–44	40–41	42	38–41	39–40	38–43	38–40	38–40	38–43		38–43	40–43	38–39	41–42
Pre-anal distance	70–75	74–75	72–74	68–72	72–73	70–76	66–69	71–72	70–75		68–76	73–76	72–73	72–74
Pectoral-1st dorsal fin distance	25–30	29–30	25–27	22–27	26–27	24–28	26–27	26–30	25–31		25–31	23–27	22–23	22–26
Pectoral 2nd dorsal fin distance	49–54	55–57	48–50	44–48	51–53	44–50	46–47	49–50	48–55		50–56	46	45–47	45–49
Pelvic 1st dorsal fin origin distance	24–30	28–29	27–30	26–30	26–29	26–30	25–28	26–27	28–33		26–33	27–28	29–32	27–28
Pelvic 2nd dorsal fin origin distance	40–47	45–49	43–44	40–44	45–46	41–46	40–43	41–44	44–49		43–49	38–43	45–47	43–45
Anal 1st dorsal fin origin distance	27–35	33–35	33–34	33–35	33–34	31–35	32–34	29–31	31–35		31–37	31–33	33–35	32–34
Pelvic-anal fin distance	32–36	34–38	33–34	32–36	35–36	30–36	30–33	33–34	32–37		30–35	33–35	33–34	33–37
Pectoral-anal fin distance	46–52	52–54	47–49	42–48	49–51	44–50	44–46	45–47	44–53		31–45	44–45	44–45	43–47
Pectoral-pelvic origin distance	18–23	20	18–22	19–20	19–22	18–23	18–20	20	18–22		17–22	17–19	16–18	16–18
1st-2nd dorsal fin Distance	23–27	28	25–26	24–26	25–26	21–26	23–25	21–24	23–29		24–28	22–26	24–25	25–26
1st Dorsal fin base length	7–14	8–11	10–13	10–15	8–9	9–14	10–13	12–13	11–15		9–13	12–14	14–16	13–14

TABLE I. (Continued

Parameters
Mugil cephalus	Ellochelon vaigiensis	Valamugil speigleri	Moolgarda perusii	Moolgarda seheli	Osteomugil engeli	Osteomugil cunnesius	Liza parsia	Planiliza subviridis		Planiliza melinopterus	Planiliza macrolepis	Planiliza kluzingeri	Chelon planiceps
2nd Dorsal fin base length	10–12	8–9	9–10	11–14	10–11	9–13	11–14	11–12	9–11		9–11	10	10–11	10–11
Pelvic fin length	13–16	15–17	15–17	16–18	13–14	15–17	15–17	14–15	14–18		14–17	16–17	15–17	15–16
Anal fin base length	11–13	10–11	12–14	15–17	14–15	10–13	15–17	12–14	11–14		10–14	10–12	11–12	11–12
Pelvic-pelvic spine dis-	6–7	9	6–7	6–8	6	6–7	6–7	6–7	6–8		6–8	7	7–8	7–8
tance
Caudal peduncle Depth	10–12	15	12–13	11–13	9–11	12–14	12–14	10–12	12–14		11–15	12	12–14	12
1st Dorsal spine length	11–15	11–13	14–17	15–17	12–13	14–18	14–15	13–14	15–19		15–19	16–17	15–17	15–16
2nd Dorsal spine length	11–15	11–12	13–16	13–15	10–11	13–17	12–15	12–13	14–17		14–17	15–16	15–16	15–17
3rd Dorsal spine length	10–13	10–11	12–14	11–14	8–10	12–15	11–13	11–12	11–15		11–15	13–14	13–14	12–15
4th Dorsal spine length	3–6	7	6–8	8–9	5–6	6–8	6–8	5–6	6–9		6–8	7–8	8–9	6–8
Pelvic fin spine length	9–12	8–10	10–12	11–13	9–10	10–12	11–13	9–11	10–13		10–12	10–11	11–12	10–12
Anal fin Spine Length	2–3	2–3	2–3	2–3	2	2–3	2–3	2	2–3		2–4	2	2	2
Anal-Caudal fin Distance	26–33	28–30	26–31	29–35	26–27	31–35	30–34	30–33	28–33		27–34	31–32	24	27–28
2nd dorsal-caudal distance	23–39	24–26	24–29	25–30	25–26	24–27	27–31	30–31	26–30		25–30	28–29	23–25	23–25
1st dorsal-caudal distance	47–53	44–48	51	49–50	50–52	45–52	49–51	49–51	46–51		47–51	48–49	46–48	48–49