Rhinobatos ranongensis, Ranong guitarfish

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Rhinobatos ranongensis Last, Séret & Naylor, 2019

Ranong guitarfish
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Image of Rhinobatos ranongensis (Ranong guitarfish)
No image available for this species;
drawing shows typical species in Rhinobatidae.

Классификация / Names народные названия | синонимы | Catalog of Fishes(род, виды) | ITIS | CoL | WoRMS | Cloffa

Пластиножаберные (акулы и скаты) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinobatidae (Guitarfishes) > Rhinobatinae
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335);  ranongensis: Named for the Ranong fish landing in western Thailand, where the first specimen was collected 25 years ago, and subsequently most of the types.

Environment: milieu / climate zone / depth range / distribution range экология

; морской демерсальный; пределы глубины 30 - 69 m (Ref. 123963), usually - m (Ref. ).   Tropical; 0°C -

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Eastern Indian Ocean: Andaman Sea, Myanmar and western Thailand.

Size / Вес / Возраст

Maturity: Lm ?  range ? - ? cm
Max length : 64.5 cm TL самец/пол неопределен; (Ref. 123963); 51.1 cm TL (female)

Краткое описание морфология | морфометрия

This medium-sized species is distinguished by the following set of characters in adult male: disc is wedge-shaped and relatively narrow, its width 31-33% TL, length 1.3-1.4 times width; snout moderately elongate, its length 3.0–3.2 times interspiracular distance, 4.1-4.4 times interorbital width; orbit and spiracular openings are small, orbit diameter ~1.5 times spiracle length; nostrils weakly oblique, length 1.3-1.6 times internarial distance; mouth narrow, 5.4-6.0% TL; preoral length 6.3-6.9 times internarial distance; posterior nasal flaps are broad; spiracular folds 2, the outermost fold slightly taller than inner fold; ridges of rostral cartilage are almost parallel, converging anteriorly but not constricted medially; anterior cartilage is broadly sickle shaped, truncate posteriorly; gill slits and their interspaces are narrow, distance between fifth gill slits 3.0-3.2 times in ventral head length; prebranchial sensory pore system distinct, extending to just behind margin of first gill slit; postscapular sensory canal indistinct, deeply embedded, not forming shallow groove; thorn patches present on supraorbit and scapular region, and row along dorsal midline rudimentary, inconspicuous; denticles on dorsal fins are densest anteriorly, present but more sparse posteriorly; dorsal fins are small, height of first 5.4-6.2% TL; pelvic-fin inner margin subequal to its base length; interdorsal distance 2.9-3.3 times first dorsal-fin base; dorsal caudal margin 2.0-2.4 times the preventral margin; upper jaw with 68-82 tooth rows; snout angle 59-64°; pectoral radials 64-68; post-synarcual centra 172-176; nasal lamellae 47-48. Colouration: dorsal fins brownish anteriorly, dusky posteriorly; dorsal disc of adults largely uniformly brownish, no spots or obvious blotches; no large, black, teardrop marking on undersurface of snout (Ref. 123963)

биология     глоссарий (например epibenthic)

Caught individuals: males at 49.4 and 50.3 cm TL were immature and the largest female (51.1 cm TL) was most probably at late adolescent or early mature stage of development (Ref. 123963).

Life cycle and mating behavior половая зрелость | размножение | нерест | икра | Fecundity | личинки

Основная ссылка Upload your references | ссылки | координатор : McEachran, John | соавторы

Last, P.R., B. Séret and G.J.P. Naylor, 2019. Description of Rhinobatos ranongensis sp. nov.(Rhinopristiformes: Rhinobatidae) from the Andaman Sea and Bay of Bengal with a review of its northern Indian Ocean congeners. Zootaxa 4576(2),257-287. (Ref. 123963)

Статус Красного Списка МСОП (Ref. 124695)


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

  Harmless





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ресурсы в Интернет

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.7   ±0.4 se; based on size and trophs of closest relatives
устойчивость к внешним воздействиям (Ref. 120179):  средний (среднего размера), минимальное время удвоения популяции 1.4-4.4 года (Preliminary K or Fecundity.).
Уязвимость (Ref. 59153):  Moderate vulnerability (37 of 100) .