Warrah Skate

description

Description. Morphometric and meristic data provided for holotype (mature male FA- 46) and two paratypes (mature male FA- 39 and mature female FA- 47) are expressed as FA- 46 (FA- 39; FA- 47). Information corresponds to fixed and fresh specimens of both sexes unless otherwise indicated. Dorsal surface medium brownish with lighter spots and reticulations, ranging from relatively simple (holotype) to complex in pattern (female paratype); ocellus in center of each pectoral fin reticulated, margins not well defined, with light spots encircled by pattern of lighter broken lines with rosette-like appearance, lighter to undistinguishable when fixed. Reticulated patterns more pronounced in fresh specimens (Fig. 7 A – B). Ventral surface dusky grey, with whitish patches around mouth, gills, pelvic girdle and cloaca; ventral surface of claspers whitish (Fig. 7 C – D). Disc rhomboidal, 1.3 (1.4; 1.3) times as broad as long; snout angle in front of spiracles 66.3 (68.7; 71.7) degrees; axis of greatest width 65.3 (65.9; 69.0) % of TL; anterior margin of disc concave anteriorly, moderately convex anterior-laterally to line of orbits, strongly or moderately concave margin just behind line of orbi

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

description

Dipturus lamillai sp. nov. differs from the three other species of Dipturus reported from the waters off the Falkland Islands (i. e., D. argentinensis, D. leptocaudus, and D. trachydermus) in the distance between orbits (6.4 – (6.4 – 6.6 versus 5.1, 3.9, and 4.9 % of TL, respectively), in the distance between spiracles (7.7 – 8.1 versus 6.0, 6.2, and 6.5 % of TL, respectively), and also in mouth width (9.3 – 10.3 versus 8.1, 7.3, and 8.5 % of TL, respectively). Moreover, both the dorsal and ventral surfaces of the body of D. lamillai sp. nov. are partially covered with fine dermal denticles whereas those of D. trachydermus are almost fully covered with dermal denticles of different sizes.

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

description

Specimens sequenced. Sequence data for NADH 2 were generated for the holotype, both paratypes, and five additional specimens of D. lamillai sp. nov. Information on sex, type status, collection number (GCD), and accession numbers for museum and GenBank of each of the specimens is provided in Table 1.

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

description

The Neighbor-Joining tree resulting from analysis of NADH 2 data is shown in Figure 13. Our eight specimens of D. lamillai sp. nov. from the Falkland Islands were found to cluster together away from the cluster composed of our three specimens of D. nasutus from New Zealand and the cluster composed of our 11 specimens of D. chilensis from Chile. GenBank specimen No. KJ 913073, collected from Chile by Vargas-Caro et al. (2016 a), was found to nest among the latter specimens. However, GenBank specimen No. KF 748508, collected from raw fillets at a skate restaurant in Seoul, Korea (Jeong & Lee 2016), was found to nest among our specimens of D. lamillai sp. nov.

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