TABLE 4 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species

TABLE 4. Distinctions of Coelorinchus amirantensis, C. paraboliceps and C. yurii.
CharacterCoelorinchus amirantensisCoelorinchus parabolicepsCoelorinchus yuriiSnout length, % HL46–5140–4438–42[including data of Shcherbachev et al. (1986)]Dorsal contour of snout in lateral viewHorizontal (Fig. 3A)Convex at level of nasal fossa, gently declining toward the tip (Fig. 14A)Horizontal (Fig. 16A)Sides of snout in dorsal viewConvex in basal half, straight to Strongly and regularly conweakly concave in front of vex (Fig. 14B) nasal fossa (Figs. 3B–C)Weakly convex in front of nasal fossa (Fig. 17A)Tip of snout in dorsal viewAcuminateRoundedApparently acuminate (distal half of terminal scute broken in both known specimens)Terminal scute of snout (medial element)Elongate, diamond-shaped, 9.9–11.1 % HL (Figs. 3B–C)Short, rectangular, 3.3 % HL (Fig. 15A)Diamond-shaped (Fig. 17A)Underside of snout (preoral region)From almost completely scaled to largely scaleless in anterior third to two-thirds of preoral lengthScaleless except small area behind terminal scute and lateral quarters of posterior third of preoral lengthAlmost completely scaledSpinules on scales over interorbital regionArranged in keel-like rows (Fig. 6A)Mostly irregularly disposed (Fig. 6C)Mostly irregularly disposed (Fig. 6E)Buttresses of spinules on trunk scales in front and below first dorsal finForming transverse ridges (Figs. 5A–B, 6B)Forming transverse ridges (Figs. 5G–H, 6D)Not forming transverse ridges (Figs. 5J–K, 6F)Buttresses of spinules on scales from tailNot forming transverse ridges (Fig. 7B)Forming transverse ridges (Fig. 7D)Not forming transverse ridges (Fig. 7F)Anus–anal length1.2–1.91.72.8–4.5