Elasmobranchii (sharks and rays) > Rhinopristiformes
(Shovelnose rays) > Rhinobatidae
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335); austini: Named for Austin Ebert (a 'flat' shark enthusiast), on the occasion of his graduation from the University of Southern California.
Environment: milieu / climate zone / depth range / distribution range
Marine; pelagic-neritic; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 0°C -
Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri
Western Indian Ocean: from southern KwaZulu-Natal Province, South Africa to north of Bazaruto Island, central Mozambique.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 115.0 cm TL (female)
Morphology | Morphometrics
This species is distinguished by the following set of characters: no prominent thorns or tubercles on dorsal surface; distinct colour pattern of paired spots of differing sizes, some forming darker transverse bands across its back; ventral surface colour mostly white, without distinctive patterning except for a prominent teardrop-shaped black blotch extending posteriorly from rostral tip to about midpoint anterior to upper mouth; nasal lamellae 61-63; upper jaw tooth count about ca. 83-93; post-synarcual centra 177-181; total vertebral segments 193-198;total pectoral skeleton radials 67-71 (Ref. 115561).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Ebert, D.A. and O. Gon, 2017. Rhinobatos austini n. sp., a new species of guitarfish (Rhinopristiformes: Rhinobatidae) from the Southwestern Indian Ocean. Zootaxa 4276(2):204-214. (Ref. 115561)
IUCN Red List Status (Ref. 124695)
Threat to humans
CountriesFAO areasEcosystemsOccurrencesIntroductionsStocksEcologyDietFood itemsFood consumptionRation
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.8 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): High vulnerability (62 of 100) .