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| Crossorhombus pescadores Amaoka, Su & Ho, 2026 |
Abstract
A new lefteye flounder, Crossorhombus pescadores sp. nov., is described based on five specimens collected from Penghu Islands. This new species differs from the other four congeners by having a pair of small black spots on the caudal fin, a horizontal triangular bluish-black marking on the blind side of body in male, the front wings of the marking reaching the base of dorsal and anal fins, and a combination of morphometric characters, including a larger head, deeper body, smaller eyes, fewer dorsal- and anal-fin rays and lateral-line scales, and other characters. A key to all five nominal species of Crossorhombus is provided.
Key words: Biodiversity, ichthyology, identification key, sexual dimorphism, taxonomy, western Pacific
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| Crossorhombus pescadores sp. nov., NMMB-P 42260, holotype, male, 99.8 mm SL, preserved. A. Ocular side; B. Blind side. |
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| Paratypes of Crossorhombus pescadores sp. nov., showing ocular sides (odd numbers) and blind sides (even numbers). A. HUMZ 237066, immature male, 74.8 mm SL; B. NMMB-P 42263, female, 92.4 mm SL; C. NMMB-P 42262, immature female, 58.0 mm SL. |
Crossorhombus pescadores sp. nov
Diagnosis. A species of Crossorhombus differing from its congeners in having: caudal fin with light-gray band along posterior sub-margin; a pair of small black spots on band at upper and lower fourth rays, respectively; a bluish-black, horizontal triangular marking on blind side of body in male; a series of dark blotches along dorsal and ventral margins of body; combination of some meristic and proportional characters: large head; small upper and lower eyes; slightly longer pectoral-fin on ocular side; fewer dorsal- and anal- fin rays and fewer scales in lateral line and others.
Etymology. The specific name “pescadores” is the old name of the type locality, meaning “fishermen” in Portuguese. It is treated as a noun in apposition.
Kunio Amaoka, Yo Su and Hsuan-Ching Ho. 2026. A New lefteye Flounder of the Genus Crossorhombus (Teleostei, Bothidae) from Penghu Islands, western Taiwan. ZooKeys. 1273: 15-25. DOI: doi.org/10.3897/zookeys.1273.167628 [13 Mar. 2026]
