分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
板鰓亜鋼(サメとエイ類) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Trygonorrhinidae (Banjo rays, Fiddler rays)
Etymology: Aptychotrema: Greek, a = without + Greek, ptyx, ptychos = fold + Greek, trema = hole (Ref. 45335); timorensis: Named for its type locality, Timor Sea.
More on author: Last.
Environment: milieu / climate zone / depth range / distribution range
生態学
海 底生の漂泳性; 深さの範囲 ? - 124 m (Ref. 58070). Tropical; 9°S - 10°S, 130°E - 132°E (Ref. 114953)
Western Pacific: Arafura Sea, northern Australia.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 58.2 cm TL オス/雌雄の選別がない; (Ref. 58070)
簡単な記述
検索表 | 形態学 | 形態計測学
This species is distinguished by the following combination of characters: disc relatively large, broadly wedge-shaped, with a narrowly pointed snout; orbit diameter equal to interorbital width; tail short, about 1.1 times precIoacal length; mouth small, precloacal length about 8 times mouth width; first dorsal-fin short, length 6% TL, ca 2.3 times in interdorsal distance; dorsal-fin apices angular; caudal fin short, dorsal margin 12% TL; pelvic fin large, length about 2.8 times its width; post-synarcual vertebral centra 156; nasal lamellae 27; ventral tip of snout not black-tipped; dorsal surface covered with small, white spots (Ref. 58070).
A benthic species found inshore on mid-continental shelf. Biology little known. Maturity size of only two males known at 48-50 cm TL (Ref. 114953).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Last, P.R., 2004. Rhinobatos sainsburyi n. sp. and Aptychotrema timorensis n. sp. -- two new shovelnose rays (Batoidea: Rhinobatidae) from the eastern Indian Ocean. Rec. Aust. Mus. 56(2):201-208. (Ref. 58070)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-1)
Human uses
用具
特記事項
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インターネットの情報源
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00267 - 0.01964), b=3.00 (2.77 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (Ref.
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (43 of 100).
