Dipturus lamillai

Concha, Caira, Ebert & Pompert, 2019



Classification: Elasmobranchii Rajiformes Rajidae

Reference of the original description
Concha, F.J. & Caira, J.N. & Ebert, D.A. & Pompert, J.H.W. (2019)
Redescription and taxonomic status of Dipturus chilensis (Guichenot, 1848), and description of Dipturus lamillai sp. nov. (Rajiformes: Rajidae), a new species of long-snout skate from the Falkland Islands. Zootaxa, 4590(5), 501–524

Types
Dipturus lamillai
Holotype: MNHNCL: ICT 7531; Paratype: CAS: 242403; MNHNCL: ICT 7532;


Description :


Citation: Dipturus lamillai Concha, Caira, Ebert & Pompert, 2019: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 08/2022

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Dipturus lamillai CONCHA, CAIRA, Ebert & POMPERT, 2019, female © Francisco Concha, Condrolab
Common names
spa raya guará, eng Warrah skate

Short Description
Diagnosis after CONCHA, CAIRA, EBERT & POMPERT, 2019 [27265]: A medium-sized species of Dipturus, to at least 107.0 cm TL (FA-7). It is distinguishable from its congeners by the following combination of characters: Dorsal surface of body medium brownish with lighter spots and reticulations ranging from simple (holotype) to complex pattern (female paratype); ocellus in center of each pectoral fin reticulated, margins not well defined. Body, dusky grey ventrally, with light patches around mouth, gills, pelvic girdle, and cloaca; area flanking rostral cartilage membranous and barely translucent; disc relatively broad with angular apices, width 75.2 (73.2; 78.9) % TL; snout elongated. Tail longer in males than in female paratype, 38.4 (37.9) % TL and 35.1% TL, respectively. Ventral head length 36.3 (35.0; 32.7) % TL; pre-orbital snout length 3.2 (3.1; 3.5) times distance between orbits; orbit diameter 0.4 (0.6; 0.4) times inter-orbital width. Dorsal surface of disc in males with scattered and thick dermal denticles over rostral cartilage; small fine dermal denticles on pre- and post-orbit; thin band of dermal denticles on anterior margins of dorsal fins and anterior margins of disc, and from tip of snout to anterior margin of alar thorn patches; thin band of dermal denticles on anterior margins of dorsal fins. In females, dorsal surface of head and anterior margins of disc with small dermal denticles; narrow patch of dermal denticles on medial-dorsal area between girdles, narrow band on anterior margins of dorsal fins. Both sexes with orbital thorns, single nuchal thorn; scapular thorns lacking; one median row of small caudal thorns; single row of lateral thorns on each side of tail, mostly at anterior part of tail in males and all along tail in female paratype; additional row of small and posteriorly directed thorns above lateral tail fold; malar and alar thorns only in adult males. Ventral sensory pores small, distinct, black-edged, not surrounded by greyish blotches, more abundant anteriorly to gill openings, scarce on abdominal area.

Distribution
slopes of the southwestern Atlantic Ocean adjacent to the Falkland Islands [27265]

Size / Weight / Age
TL (max) (types): female 114.0 cm [27265]

Habitat
marine; depth range: 162-515m (types) [27220]

Dentition
Teeth uni-cuspid, with sub-circular bases, arranged in longitudinal rows in both sexes; cusps of medial teeth long, sub-conical, bluntly pointed, posteriorly and lingually directed in both upper and lower jaws; cusps of lateral teeth oblique and almost flat; cusps of males longer and narrower than in females. [27265]

Remarks
shark-references Species-ID=15437