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Dipturus mennii Gomes and Paragˇ, 2001
Life   Vertebrata   Fish   Rajidae   Dipturus

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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Dipturus&speciesname=mennii ---> https://www.fishbase.se/Summary/speciesSummary.php?genusname=Dipturus&speciesname=mennii
https://www.fishbase.se/Summary/speciesSummary.php?genusname=Dipturus&speciesname=mennii ---> https://www.fishbase.se/summary/Dipturus-mennii.html

Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Dipturus mennii Gomes & Parag├│ , 2001

South Brazilian skate Upload your photos  and  videos
Pictures | Google image Image of Dipturus mennii (South Brazilian skate) Dipturus mennii
Male picture by Gomes, U.L./Parag├│, C.

Classification / Names Common names | Synonyms | Catalog of Fishes ( gen. , sp. ) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates) > Rajinae
Etymology: Dipturus: Greek, di = two + Greek, pteryx = fin (Ref. 45335 ) ;   mennii: Named for Roberto Carlos Menni.

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

Marine; demersal; depth range 135 - 550 m (Ref. 114953 ).   Subtropical; 20°S - 40°S, 60°W - 40°W (Ref. 57911 )

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Southwest Atlantic: Brazil, from São Paulo to Rio Grande do Sul.

Length at first maturity / Size / Weight / Age

Maturity: L m   ? , range 62 - ? cm
Max length : 167 cm TL male/unsexed; (Ref. 114953 )

Short description Morphology | Morphometrics

Differs from its congeners by having prickly interorbital space with few developed dermal denticles an no arrangement pattern easily visible and sensible when touched. Dorsal surface smooth with nuchal thorns confluent with median dorsal and caudal thorns up to the origin of the first dorsal fin. Scapular and interdorsal thorns are present. Ventral surface with rare, few developed prickles in between the gill openings. Mature specimens reaching about 160 cm TL and 120 cm disk width. Dorsal and ventral surfaces brown, with ventral tip of pectoral fins light brown. Dorsal and ventral snout surfaces prickly with several tiny prickles. Anterior margin of pectoral fins convex in males. Orbital series thorns distributed as 4 preorbital and 2 to 3 interorbital; the postorbital thorns are absent. The rest of thorns are distributed as 2 to 5 interspiracular; 5 to 6 nuchal, 2 to 3 scapular and 12 to 18 mediodorsal. The caudal region bears 3 to 5 rows of thorns; 25 to 36 mediocaudal; 7 to 24 laterocaudal on the left and on the right; 43 to 47 alar thorns present in males, in 3 rows and 1 to 3 interdorsal; 12-16 pseudobranchial lamellae. The horizontal orbit diameter 2 times length of second dorsal fin base. The length of first dorsal fin base is equal to the interorbital distance. The dorsal region of claspers is smooth. The dental formula is 33-36/30-37. This species is similar with Dipturus trachyderma in having the rough skin on the interorbital region; both differ from D. leptocauda , D. chilensis , and D. teevani which possess smooth interorbital region. Other body regions of D. mennii have less evident dermal denticles, but sensible when touched, and because of this, this species was mistaken for D. trachyderma . D. mennii compared with D. trachyderma , exhibits 1 row of confluent thorns from nape to first dorsal fin origin while the latter exhibits a row of thorns in caudal region only; have 4 preorbital thorns (vs. 2); 2-3 interorbital and no postorbital thorns (vs. 1 interorbital and 1 postorbital thorn); mature males with 3 rows of alar thorns with variation of the total number 43-47 (vs. 4 rows with total 17- 48); dorsal region of claspers smooth (vs. rough); proportionally smaller in disc width and length, horizontal orbit diameter, distance between first and fifth gill openings and dorsal fins base. D. mennii differs from other Brazilian species ( leptocauda and chilensis ) in spinulation arrangement; with the two exhibiting smooth dorsal region with 1 nuchal thorn and no mediodorsal and laterocaudal thorns (Ref. 42991 ).

Biology     Glossary (e.g. epibenthic)

Inhabit continental slopes. Oviparous (Ref. 50449 ). Eggs have horn-like projections on the shell (Ref. 205 ). Maturity size unknown, 95 cm TL male was still immature (Ref. 114953 ).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449 ). Eggs have horn-like projections on the shell (Ref. 205 ).

Main reference Upload your references | References | Coordinator : McEachran, John | Collaborators

Gomes, U.L. and C. Parag├│ , 2001. Esp├ęcie nova de raj├şdeo (Chondrichthyes, Rajiformes) do Atl├óntico Sul Ocidental. Bol. Do Mus. Nac., N.S., Zool., Rio de Janeiro 448:1-10. (Ref. 42991 )

IUCN Red List Status (Ref. 120744 )

  Vulnerable (VU)  (A4d); Date assessed: 01 March 2007

CITES (Ref. 115941 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search ) | FishSource |

More information

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Length-weight
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Summary page | Point data | Common names | Photos

Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes ( gen. , sp. ) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank( genome , nucleotide ) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Tree of Life | Wikipedia( Go , Search ) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00282 (0.00128 - 0.00621), b=3.24 (3.06 - 3.42), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245 ). Trophic Level (Ref. 69278 ):  4.0   ±0.6 se; Based on size and trophs of closest relatives Resilience (Ref. 69278 ):  Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100). Vulnerability (Ref. 59153 ):  Very high vulnerability (79 of 100) .

Entered by Capuli, Estelita Emily Modified by Abucay, Luisa Fish Forum
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