Double-row Grubfish, Parapercis biordinis Allen 1976


Illustration of the preserved holotype of the Double-row Grubfish, Parapercis biordinis, WAM P.25206-001, from SW of Point Cloates, Western Australia. Source: Fig. 3, in Allen (1976) Journal of the Royal Society of Western Australia 59(1): 24-30 / Biodiversity Heritage Library. License: CC BY Attribution

Summary:
A grubfish with five pairs of dark brown blotches along the side, followed by 2 pairs of dusky spots or blotches on the caudal fin, 7-8 large dusky spots near the base of the dorsal fin, and a dark 'eyebrow' spot on the upper part of the eye.

Cite this page as:
Bray, D.J. 2021, Parapercis biordinis in Fishes of Australia, accessed 01 Oct 2022, https://fishesofaustralia.net.au/home/species/520

Double-row Grubfish, Parapercis biordinis Allen 1976

More Info


Distribution

Endemic to Western Australia, from south-west of Point Cloates to north of Port Hedland.

Features

Dorsal fin V, 21; Anal fin 16-18; Pectoral fin 17-18; Caudal fin (branched rays) 15; Gill rakers 5+12; Lateral line scales 49-54,
Eye very large (diameter longer than snout, 2.7 to 2.95 times in head length); preopercle entire. Lower jaw with 6-7 teeth in outer row; vomerine teeth in a single row; palatine teeth absent. Last dorsal-fin spine connected by membrane to first dorsal-fin ray opposite tip of last dorsal spine.

Colour

Body with a series of double blotches along the sides, dark spots along the base of the soft-dorsal fin, cycloid cheek scales, and a single row of vomerine teeth. However, P. biordinis has higher pectoralfin ray and gill raker counts (Tables 3–4), the preopercle entire (versus finely serrated, especially around angle in P. hoi), and numerous differences in colouration, including five (versus six or seven) pairs of more well-defined blotches laterally, two pairs of dusky blotches on the caudal fin (one pair on the base and another on the medial portion of the fin, versus one pair on the base only in P. hoi), a dark ‘eyebrow’ spot on the upper eye (absent in P. hoi), and seven or eight large dusky spots near the base of the soft dorsal-fin (versus about 10 spots that also extend onto the adjacent upper body in P. hoi).

Similar Species

The Double-row Grubfish differs from Ho's Sandperch, Parapercis hoi, in having five (vs. 6-7 in P. hoi) pairs of more well-defined lateral blotches; two pairs of dusky blotches on the caudal fin (one pair on the base and another on the medial portion of the fin, vs. one pair on the base only in P. hoi), a dark ‘eyebrow’ spot on the upper eye (spot absent in P. hoi), and 7-8 large dusky spots near the base of the soft dorsal-fin (vs. about 10 spots that also extend onto the adjacent upper body in P. hoi).
P. biordinis also has higher pectoral-fin ray and gill raker counts, an entire the preopercle (vs. preopercle finely serrated, especially around the angle in P. hoi).

Etymology

The specific name biordinis is from the Latin bi (= two) and ordinis (= row, series, arrangement) in reference to the double row of spots along the side.

Species Citation

Parapercis biordinis Allen, 1976, J. Roy. Soc. W. A. 59(1): 28, fig. 3. Type locality:  south-west off Point Cloates, Western Australia [22°59'S, 113°25'E], 71 fathoms.

Author

Bray, D.J. 2021

Resources

Atlas of Living Australia

Double-row Grubfish, Parapercis biordinis Allen 1976

References


Allen, G.R. 1976. Descriptions of three new fishes from Western Australia. Journal of the Royal Society of Western Australia 59(1): 24-30 figs 1-3 See ref at BHL

Johnson, J.W. & Motomura, H. 2017. Five new species Parapercis (Perciformes: Pinguipedidae) from southeast Asia and northwest Australia. Zootaxa 4320(1): 121-145 https://doi.org/10.11646/zootaxa.4320.1.7

Randall, J.E. 2001. Pinguipedidae. pp. 3501-3510 in Carpenter, K.E. & Niem, T.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 6 pp. 3381-4218.

Quick Facts


CAAB Code:37390024

Depth:130-141 m

Habitat:Sand & rubble areas

Max Size:7 cm SL (holotype)

Native:Endemic

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CAAB distribution map