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Elasmobranchii (Haie und Rochen) (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 Ökologie

seewasser benthopelagisch; tiefenbereich ? - 124 m (Ref. 58070). Tropical; 9°S - 10°S, 130°E - 132°E (Ref. 114953)

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Western Pacific: Arafura Sea, northern Australia.

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 58.2 cm TL Männchen/unbestimmt; (Ref. 58070)

Kurzbeschreibung Morphologie | Morphometrie

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 Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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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 Rote Liste Status (Ref. 130435)

gefährdet, siehe IUCN Red List (VU) (B1ab(v)); Date assessed: 20 February 2015

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00724 (0.00267 - 0.01964), b=3.00 (2.76 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.6 ±0.6 se; based on size and trophs of closest relatives

Widerstandsfähigkeit (Ref. 120179): niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (Preliminary low fecundity).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (43 of 100).

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Aptychotrema timorensis Last, 2004