(كوسه ها و سپرماهيان) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Rhinobatidae (Guitarfishes)
Etymology: stehmanni: Named for Dr. Matthias F.W. Stehmann for his invaluable contributions to chondrichthyan taxonomy, particularly with respect to skates.
Eponymy: Dr Matthias F W Stehmann (d: 1943) is a German ichthyologist whose university career at Kiel University (1962–1969) resulted in degrees covering marine sciences, zoology and limnology and culminated with a doctorate in marine sciences. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
بوم شناسي
دريايي نزديك كف زي; تغييرات عمق 36 - 43 m (Ref. 124452). Tropical
Western Indian Ocean: off Socotra Is. (restricted).
Size / Weight / سن
Maturity: Lm ? range ? - 37.8 cm
Max length : 62.2 cm TL جنس نر / بدون خواص جنسي; (Ref. 124452); 60.2 cm TL (female)
توصيف مختصر
كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
This species is distinguished by the following set of characters: dorsal surface is smooth, no prominent thorns or tubercles, except for the slightly enlarged granular denticles partially around orbital rims and rather regularly distributed along midline from nape to or to somewhat anterior to first dorsal-fin origin, none between dorsal fins and upper caudal fin; the snout semi-translucent with a few, somewhat elongated bluish-gray spots only, giving it a very reduced stripe-nosed appearance, patterning with small bluish-gray circular spots generally few and confined to symmetrical patterns on snout tip, the posterior pectoral-fin margins, a pair of tiny spots on midbody behind occipital joint, and few spots on posterior pelvic-fin margins; brown spots indistinct on body and dorsal and caudal fins; ventral surface is white except for a blackish blotch and two tiny black spots on ventral snout tip in smallest juvenile paratype; nasal lamellae 43-48; upper jaw tooth row count ca. 64-78; post-synarcual centra 181-186; total vertebral segments 194-200; total pectoral skeleton radials 63-67 (Ref. 124452).
Occurs in coastal waters. Size range from 20.8 - 62.2 cm TL, males at size 37.8 cm TL is considered very early subadult (apparently start to mature around this size) and juvenile at 20.8 cm TL; while females at 59.4 and 60.2 cm TL are presumed to be adult (Ref. 124452).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | تخم ها | Fecundity | توزاد ( لارو)
Weigmann, S., D.A. Ebert, B. Séret, 2021. Resolution of the Acroteriobatus leucospilus species complex, with a redescription of A. leucospilus (Norman, 1926) and descriptions of two new western Indian Ocean species of Acroteriobatus (Rhinopristiformes, Rhinobatidae). Marine Biodiversity (2021):51:58. (Ref. 124452)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2024-2)
خطر برای انسان ها
Harmless
استفاده انسانی
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00295 (0.00151 - 0.00578), b=3.13 (2.96 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.5 ±0.5 se; based on size and trophs of closest relatives
جهندگی (Ref.
120179): پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (45 of 100).
