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Squaliformes (Sleeper and dogfish sharks) >
Somniosidae (Sleeper sharks)
Etymology: Scymnodalatias: scymno-, referring to previous placement in Scymnodon; dalatias, referring to lack of dorsal spines like most sharks in the family Dalatiidae (sometimes included within Somniosidae) (See ETYFish); sherwoodi: In honor of C. W. Sherwood, who discovered the shark washed up on a beach in Canterbury, New Zealand, and presented it to the local museum (See ETYFish).
Eponymy: C W Sherwood discovered the holotype lying washed up on the beach at New Brighton, New Zealand (1920) and presented it to the Canterbury Museum. Nothing further was recorded. (Ref. 128868), visit book page.
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
بحري قاعية التغذية و المعيشة. Subtropical; 42°S - 44°S
Southwest Pacific: New Zealand. Possibly occurring off Australia (Ref. 6871).
الحجم / وزن / العمر
النضج: Lm ?  range ? - ? cm
Max length : 80.3 cm TL ذكر/ مختلط الجنس; (Ref. 247)
الأشواك الظهرية (المجموع) : 0. Dark brown or black with a grey blaze on the back behind the eyes (Ref. 26346). Scymnodon-like, but with no dorsal spines and the first dorsal fin slightly more posterior than in Scymnodon species; snout somewhat flattened, not bulbous, lower teeth with very high, erect or semi-erect cusps, distal blades and no serrations, first dorsal on middle of back behind pectoral fins, caudal fin asymmetrical, with a short lower lobe, fins without prominent light edges (Ref. 247).
Body shape (shape guide): elongated.
A rare species (Ref. 26346) presumably inhabiting the insular slope of New Zealand (Ref. 247). Ovoviviparous (Ref. 205).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Distinct pairing with embrace (Ref. 205).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
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مصائد: غير ذات اهمية
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تقديرات تستند إلى النماذج
مؤشر التنوع الشُعبي الوراثي (مرجع
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00398 (0.00172 - 0.00922), b=3.13 (2.94 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (مرجع
69278): 4.0 ±0.4 se; based on size and trophs of closest relatives
المرونه (مرجع
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Fec assumed to be <100).
ضعف الصيد (Ref.
59153): Moderate to high vulnerability (52 of 100).
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المغذيات (Ref.
124155): Calcium = 15 [3, 74] mg/100g; Iron = 0.552 [0.142, 1.667] mg/100g; Protein = 19.7 [17.4, 22.0] %; Omega3 = 0.27 [0.10, 0.78] g/100g; Selenium = 27.5 [7.9, 98.4] μg/100g; VitaminA = 31.4 [7.8, 139.6] μg/100g; Zinc = 0.658 [0.308, 1.290] mg/100g (wet weight);