Rajella fyllae

(LÜTKEN, 1887)


Round ray
Classification: Elasmobranchii Rajiformes Rajidae

Reference of the original description
LÜTKEN, C.F. (1887)
Korte Bidrag til nordisk Ichthyographi. VI. En for Grønlandshavet ny Rokke-art (Raja Fyllae n. sp. ad int.) m. m. Videnskabelige Meddelelser fra den Naturhistoriske Forening i Kjøbenhavn, Aaret 1887: 1–4, Pl. 1.

Image of the original description

Rajella fyllae (LÜTKEN, 1887)

Synonyms / new combinations and misspellings
Breviraja marklei, Raia fyllae, Raja fyllae, Raja fyllae lipacantha, Raja (Rajella) fyllae

Types
Rajella fyllae
Holotype: ZMUC: P08488;
Breviraja marklei
Holotype: CMNFI: 1986-0036.1; Paratype: MCZ: 63198; ROM: 50330; USNM: 277973;
Raja fyllae lipacantha
Syntype: ZMB: 18292 ZMUC: P08717; ZMUC: P08718; ZMUC: P08723; ZMUC: P08724; ZMUC: P08725; ZMUC: P08726; ZMUC: P08727; ZMUC: P08728; ZMUC: P08729; ZMUC: P08730; ZMUC: P08731; ZMUC: P08732; ZMUC: P08733; ZMUC: P08734; ZMUC: P08735; ZMUC: P08736;


Description :


Citation: Rajella fyllae (LÜTKEN, 1887): In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 02/2019

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Common names
deu \(T\) Fyllasrochen, spa Raya redonda, fra \(T\) Raie ronde, eng Round ray, eng Round skate, eng Sandy skate

Short Description
Snout is short and obtuse. Midbelt of its disc and upper surface of its tail are rough with large thorns in irregular rows. Upper surface ash gray to chocolate brown. Lower surface white, grayish white, pale gray or light fawn color, sooty patches on pelvic fins and axils of pectoral fins [199]. Diet: Barents Sea (data base: of 85 stomachs examined): Round skate fed mainly on bottom benthos, especially Polychaeta (31% by mass) and Gammaridae (14% by mass). Northern shrimp (26% by mass) and fisheries waste (10% by mass) were also major components of their diets. Fish (mostly capelin and young cod) occurred in small quantities. Small individuals (<35 cm TL) consumed exclusively benthos (Polychaeta and Gammaridae) and only those of the 36–40 cm TL-group and larger fed on bigger prey. The largest skates (51–55 cm TL-group) had a high proportion of small benthic organisms (<30–40%). [5910];

Distribution
Northeast Atlantic: Spitsbergen [=Svalbard] to southern Norway, southern Greenland, Iceland, Faeroe Islands to Shetlands, western coasts of British Isles and Bay of Biscay. Northwest Atlantic: Greenland to Nova Scotia, Canada. Source: www.gbif.org

Human uses
fisheries: of no interest

Biology
Oviparous, paired eggs are laid. Embryos feed solely on yolk [733]. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother [17086]. Found in deeper shelf and slope waters, in 3-5.5°C water temperature (6902). Benthic (Ref. 58426). Feed on all kinds of bottom animals with preference for invertebrates [7182] like copepods, amphipods and mysids [199]. A nematode, Proleptus mackenzei is a known parasite of the species (Ref. 5951).

Size / Weight / Age
60.0 cm TL (male/unsexed; [20241])

Habitat
bathydemersal; marine; depth range 170 - 2050 m [7182], usually 300 - 800 m [7182]

Remarks
shark-references Species-ID=5863;

Parasites (arranged by Jürgen Pollerspöck)
Nematoda
  • Proleptus mackenziei WILLIAMS & HEDDWYN, 1978 [13251]