分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鰓亞綱 (鯊魚與魟魚) (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
生態學
海洋 底中水層性; 深度上下限 ? - 124 m (Ref. 58070). 熱帶; 9°S - 10°S, 130°E - 132°E (Ref. 114953)
Western Pacific: Arafura Sea, northern Australia.
西太平洋: 澳洲。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 58.2 cm TL 雄魚/尚未辨別雌雄; (Ref. 58070)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
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).
這種被藉著下列的組合特徵區別: 體盤相當大的﹐寬廣楔形, 具有一個狹窄尖的吻; 眼窩直徑等於眼間骨寬度; 尾部短, 大約 1.1 倍 precIoacal 長度; 嘴小的, 倍嘴寬度的 precloacal 長度大約 8; 第一背鰭短，長度 6% TL, ca 2.3 倍間背片距離; 背鰭頂點有角的; 尾鰭短, 上緣 12% TL; 腹鰭大的, 長度大約 2.8 倍於它的寬度; 在 synarcual 之後的椎骨中心 156; 鼻的嗅板 27; 腹面吻尖不是黑色的-頂端; 背面覆蓋著小又白色的斑點了。 (參考文獻 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
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
西太平洋: 澳洲。
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 瀕危狀態 (Ref. 130435: Version 2024-2)
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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).
營養階層 (Ref.
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 低的, 最小族群倍增時間4.5 - 14 年 (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (43 of 100).
