Hortia pseudotaranis, Kantor, Yuri, Lozouet, Pierre, Puillandre, Nicolas & Bouchet, Philippe, 2014

Kantor, Yuri, Lozouet, Pierre, Puillandre, Nicolas & Bouchet, Philippe, 2014, Lost and found: The Eocene family Pyramimitridae (Neogastropoda) discovered in the Recent fauna of the Indo-Pacific, Zootaxa 3754 (3), pp. 239-276 : 256-257

Hortia pseudotaranis new species

Figure 2 H, 10A–C

Type material. Holotype MNHN 24570.

Type locality. East coast of New Caledonia, 21º36’S, 166º29’E, 625–650 m [BIOCAL, st. DW 106].

Material examined. New Caledonia: BIOCAL, st. DW 106, 21º36’S, 166º29’E, 625–650 m, 1 dd (holotype); BIOGEOCAL, st. DW 253, 21º32’S, 166º29’E, 310–315 m, 1 dd; st. KG 227, 21º33’S, 166º24’E, 500 m, 1 dd. EXBODI, st. CP 3809, 21º41’S, 166º37’E, 685–880 m, 1 dd; st. CP 3842, 22º23’S, 167º22’E, 756–769 m, 1 dd

Description (holotype) ( Fig. 10 A–B). Shell small, narrowly fusiform, with high elevated spire (LWL/SL 0.50) and attenuated, medium long canal. Shell of ca 1.5 protoconch whorls and 6.5 slightly convex teleoconch whorls. Protoconch paucispiral, globose, smooth, diameter 640 Μm, height 600 Μm, with 3 very weak opisthocyrt ribs marking transition to teleoconch. Suture shallowly impressed. Besides inconspicuous growth lines, axial sculpture of narrow, closely spaced, sinuous and slightly prosocline ribs, 12 on penultimate whorl, 13 on last whorl. Ribs run from suture to suture on spire whorls and become obsolete on shell base at transition to canal. Spiral sculpture of one weak spiral thread abapically of suture, and distinct, broadly spaced, narrow cords, rounded in section, 2 on spire whorls, 3 on penultimate and 15 on last whorl, 10 of which on shell base and canal are more closely spaced. Cords on spire whorls and five cords on periphery of last whorl form small but distinct rounded beads at intersection with axial ribs. Aperture medium high, narrow elongate, 0.40 (together with canal) of SL. Outer lip partially broken, concave at transition to canal. Growth lines delineating a shallow notch at shoulder. Columella short, slightly concave, with a very weak columellar plait deep inside, seen when shell is rotated counterclockwise. Callus narrow, of thin transparent glaze overlying parietal region. Siphonal notch very shallow. Canal well differentiated from aperture, narrow, medium long, recurved abaxially. Shell color off-white. Periostracum missing.

Measurements (holotype): SL 8.4 mm, LWL 4.2 mm, AL (with canal) 3.4 mm, SW 2.3 mm. The holotype is the largest specimen.

Distribution. East coast of New Caledonia, shells in 315– 625 m.

Etymology. Named after Taranis , a genus of Raphitomidae (Conoidea) that superficially resembles this new species. It is used as a noun in apposition.

Remarks. Hortia taranis is most similar to Hortia macrocephala n. sp. and differs in having more pronounced and fewer axial ribs (13 on last whorl in H. pseudotaranis vs. 19 in macrocephala ). In pattern of shell sculpture, it also resembles the fossil Hortia priabonica , but differs in its much larger shell and paucispiral protoconch.

Figures

FIGURE 2. Overview of fossil and Recent Pyramimitridae. A. Endiatoma quadricincta (Cossmann, 1883), MNHN. F. A 47757, Lower Eocene, France. B – C. Pyramimitra terebraeformis (Conrad, 1848), MNHN. F. J 08748, Middle Eocene, USA. D – E. Pyramimitra quadralirata Dockery, 1977, MNHN. F. A 47750, Middle Eocene, USA. F. Hortia priabonica n. sp., MNHN. F. A 47752, Upper Eocene, France. G. Hortia arriuensis Lozouet, 1999, MNHN. F. A 47751, Upper Oligocene, France. H. Hortia pseudotaranis n. sp., New Caledonia, SL 8.4 mm. I. Hortia macrocephala n. sp., New Caledonia, SL 10.4 mm. J. Hortia paradrillia n. sp., New Caledonia, SL 8.1 mm. K. Hortia marshalli n. sp., New Zealand, SL 10.6 mm. L. Hortia spenceri n. sp., New Zealand, SL 9.0 mm. M. Hortia aotearoa n. sp., New Zealand, SL 9.0 mm. N. Hortia solitaria n. sp., South of Madagascar, SL 6.5 mm. O. Teremitra fallax n. sp., Solomon Islands, SL 11.8 mm. P. Teremitra efatensis (Aubry, 1999), Vanuatu, SL 10.8 mm. Q. Teremitra? hortensis (Vinassa de Regny, 1898), Upper Eocene, France. R. Teremitra sp., Taiwan, SL 16 mm. S. Vaughanites? superstes n. sp., Philippines, SL 19.1 mm.

FIGURE 10. Hortia pseudotaranis n. sp. A – B. Holotype, SL 8.4 mm. C. BIOGEOCAL, st. KG 227, 21 º 33 ’ S, 166 º 24 ’ E, 500 m, SL 6.3 mm. Hortia solitaria n. sp. D – E. Holotype, SL 6.5 mm.