Parabothus taiwanensis Amaoka & Shen, 1993:1042
Parabothus chlorospilus
Parabothus
Crossorhombus
The lefteye flounder family Bothidae (Order Pleuronectiformes) of Taiwan
Amaoka, Kunio
Ho, Hsuan-Ching
Zootaxa
2019
2019-12-04
4702
1
155
215
4CMWB
Amaoka & Shen, 1993
Amaoka & Shen
1993
[151,727,513,540]
Actinopterygii
Bothidae
Parabothus
Animalia
Pleuronectiformes
47
202
Chordata
species
taiwanensis
Figures 9A–B; Table 11
Parabothus taiwanensis Amaoka & Shen, 1993:1042( Typelocality: Kaohsiung, Taiwan). Shen & Wu, 2012:754. Parabothus chlorospilus(not of Gilbert, 1905): Shen, 1983:13. Parabothussp.: Shen, 1983:13; Shen in Shen et al., 1993:571. Crossorhombussp.: Shen, 1983:19.
Specimens examined. NMMB-P23214( 1 female, 101.6), Ke-tzu-liao, 17 Mar. 2016; NMMB-P23219(2, 73.0– 85.5), Ke-tzu-liao, 30 Apr. 2015; NMMB-P23232( 3 males, 1 female, 91.8–132.2), Ke-tzu-liao, 31 Mar. 2016; NMMB-P23272( 1 male, 1 female, 116.3–129.6), Ke-tzu-liao, 28 Feb. 2016; NMMB-P23305( 1 male, 1 female, 92.7–95.6), Ke-tzu-liao, 18 Mar. 2016; NMMB-P24854( 1 male, 1 female, 116.7–124.8), NMMB-P25710( 1 male, 117.6), NMMB-P25713( 2 males, 100.8–123.9), Ke-tzu-liao, 2 Apr. 2015; NMMB-P25725( 2 males, 98.8–122.3), Ke-tzu-liao, 11 Mar. 2017. More specimens deposited in NMMB-P. Diagnostic features.D 98–110; A 77–87; P 11–14; C 2+13+2=17; LLs 61–67; GR 0+7–8=7–8; vert. 10+28– 30=38–40. Body elliptical, deepest at anterior 1/3 of body (36.8–45.6% SL). Head slightly longer than half of body depth (22.0–28.1% SL); upper profile of head with deep concavity in front of interorbital space. Snout much shorter than eye diameter. Rostral spine on snout tip blunt in males, absent in females and juveniles. Eye diameter slightly shorter than upper-jaw length. Orbital spine absent in either sex. Interorbital space narrow, deeply concave, its width narrower than eye diameter, wider in males than females and juveniles, 3.0–3.5% SL in males, 2.3–2.6% SL in females, 1.2–1.3% SL in juveniles. Mouth moderate, upper-jaw length 7.4–12.7% SL; maxilla extending to slightly beyond anterior margin of lower eye. Prominent knob on mandibular symphysis in males, feeble or absent in females and juveniles. Teeth on upper jaw biserial, those in outer series stronger and more widely spaced than those in inner series; some anterior teeth canine-like; teeth on lower jaw uniserial, nearly equal in size and spacing to inner-row teeth of upper jaw. Gill rakers only on lower limb, moderate in size, not serrate. Scales on ocular side ctenoid with long ctenii; scales on blind side cycloid. Pectoral fin on ocular side very short (13.5–22.3% SL). Coloration.Ocular side of body grayish brown without any distinct color pattern (body pale purple when scales are removed); body on blind side grayish white. All fins on both sides uniformly grayish brown without any noticeable spots or blotches. Size.Reaching 130 mmSL in Taiwan; up to 153 mmSL in East ChinaSea ( Yamada et al., 2007).
Distribution.Northeastern and southwestern Taiwan, at depth not deeper than 100 m(present study); East ChinaSea ( Yamada et al., 2007).
Remarks.This species can be easily separated from P. polylepisin having more dorsal- and anal-fin rays, and from Parabothus kiensisand P. coarctatusin having clearly fewer lateral-line scales. This species exhibits sexually dimorphism and ontogenetic changes of interorbital width and presence or absence of a rostral spine and mandibular knob. Parabothussp. and Crossorhombussp. reported by Shen (1983)may in fact represent the same species.
2462935161
[418,1127,153,180]
2016-03-17
NMMB-P
48
203
NMMB-P23214
1
1
2462935168
2015-04-30
NMMB-P
48
203
NMMB-P23219
1
2462935157
[543,1432,189,215]
2016-03-31
NMMB-P
48
203
NMMB-P23232
4
1
3
2462935153
[151,1023,225,252]
2016-02-28
NMMB-P
48
203
NMMB-P23272
2
1
1
2462935162
2016-03-18
NMMB-P
48
203
NMMB-P23305
2
1
1
2462935164
[592,1143,260,288]
NMMB-P
48
203
NMMB-P24854
2
1
1
2462935163
NMMB-P
48
203
NMMB-P25710
1
1
2462935160
[237,980,296,323]
2015-04-02
NMMB-P
48
203
NMMB-P25713
2
2
2462935154
2017-03-11
NMMB-P
48
203
NMMB-P25725
2
2