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Crossorhombus howensis Hensley & Randall, 1993

Lord Howe Island flounder
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Image of Crossorhombus howensis (Lord Howe Island flounder)
Crossorhombus howensis
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> Pleuronectiformes (Flatfishes) > Bothidae (Lefteye flounders)
Etymology: Crossorhombus: Greek krossoi = tassel + Greek, rhombos = paralelogram (Ref. 45335).
More on authors: Hensley & Randall.

Environment: milieu / climate zone / depth range / distribution range экология

морской демерсальный; пределы глубины ? - 8 m (Ref. 9824). Temperate

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | Faunafri

Northwest Pacific: Taiwan. Southwest Pacific: Lord Howe Island. Possibly occurring in the Western Central Pacific.

Size / Вес / Возраст

Maturity: Lm ?  range ? - ? cm
Max length : 13.0 cm TL самец/пол неопределен; (Ref. 9824)

Краткое описание определительные ключи | морфология | морфометрия

членистые (мягкие) лучи спинного плавника (общее число) : 85 - 88; членистые (мягкие) лучи анального плавника: 64 - 69. Head and body on eyed side tan to grey with many small dark specks and spots. A series of dark spots very close to dorsal and ventral edges of body. About 4 or 5 spots along straight section of lateral line. Dorsal, anal, and caudal fin light coloured with small dark specks. Flaps on eyes of males with dark spots. Blind side of females tan to whitish. Males with distinct bluish black V-shaped mark on blind side. Ventral arm of "V" wider than dorsal arm. Body ovoid, its depth about 1.7 times SL. Head small, snout shorter than eye, profile steep anterior to interorbital area. Head length 3.9 to 4.2 times SL. Interorbital region broad and concave, probably wider in males than females. Males with a rostral spine and several small orbital spines. Both eyes on left side of head, front margin of upper eye over middle of lower eye. Flaps on posterior areas of eyes in males. Mouth small, reaching to below anterior margin of lower eye, length of upper jaw 3.5 to 4.1 times in head length. Teeth of upper jaw biserial, teeth of outer row more widely spaced than teeth of inner row. Teeth in lower jaw uniserial. Gill rakers short. Scales on eyed side with long ctenii. Scales on blind side cycloid. Pectoral fin on eye side with 11 or 12 rays and on blind side with 9 or 10 rays (Ref 42535).

биология     глоссарий (например epibenthic)

Lives on silty sand bottoms and feeds on bottom-living animals. Only known from specimens collected from divers. Sexually dimorphic characters possibly develop at about 6-7 cm SL.

Life cycle and mating behavior половая зрелость | размножение | нерест | икра | Fecundity | личинки

Основная ссылка Upload your references | ссылки | координатор : Amaoka, Kunio | соавторы

Hensley, D.A. and K. Amaoka, 2001. Bothidae. Lefteye flounders. p. 3799-3841. In K.E. Carpenter and V. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Vol. 6. Bony fishes part 4 (Labridae to Latimeriidae), estuarine crocodiles. FAO, Rome. (Ref. 9824)

Статус Красного Списка МСОП (Ref. 130435: Version 2024-2)

  Нехватка данных (DD) ; Date assessed: 11 November 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

  Harmless





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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00408 - 0.02036), b=3.04 (2.85 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.5   ±0.37 se; based on food items.
устойчивость к внешним воздействиям (Ref. 120179):  средний (среднего размера), минимальное время удвоения популяции 1.4-4.4 года (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).