Conus (Taranteconus) polongimarumai (Kosuge, 1980)

Tenorio, Manuel J. & Puillandre, Nicolas, 2023, Revision of the deep-water cone snail fauna from New Caledonia (Gastropoda, Conoidea), European Journal of Taxonomy 896, pp. 1-134 : 112-113

Conus (Taranteconus) polongimarumai (Kosuge, 1980)

Figs 2 , 82I–L, N , 84

Conus polongimarumai Kosuge, 1980a: 63 , pl. 18 figs 6–8.

Conus polongimarumai – R̂ckel et al. 1995b: no. 243, pl. 52 figs 21–24.

Taranteconus polongimarumai – Tucker & Tenorio 2013: 324. — Monnier et al. 2018a: 288.

Material examined

14 lots (about 20 specimens). See Supp. file 1.

Type material

Holotype PHILIPPINES • 22.5 mm; Punta Engaño , Mactan Island; IMT 80-63 .

Figured material

NEW CALEDONIA • 20.5 mm; Norfolk Ridge , Munida, off New Caledonia, stn DW3106; 23°02′ S, 168°21′ E; 180‒220 m depth; 27 Oct. 2008; TERRASSES expedition ( Fig. 82I ) • 19.4 mm; Grand Passage , off New Caledonia, stn DW2985; 18°59′ S, 163°06′ E; 277‒289 m depth; 5 May 2008; CONCALIS expedition; MNHN ( Fig. 82J ) • 18.9 mm; same collection data as for preceding; MNHN ( Fig. 82K ) • 17.3 mm; same collection data as for preceding; MNHN ( Fig. 82L ) • 21 mm; Pouembout , New Caledonia; 80–90 m depth; Franck Leterrier coll. ( Fig. 82N ) .

Geographical distribution and bathymetry

Philippines, Marshall Islands, W Thailand, in shallow water to 350 m deep. In New Caledonia it has been sampled at depths between 100 to 500 m in the Coral Sea, Grand Passage area, Norfolk Ridge and Loyalty Islands.

Remarks

Shell small (maximum shell length 30 mm), conical with a moderate to high, stepped spire of straight to slightly concave profile. Spire whorls and shoulder with strong nodules continuing as axial costae below. Multispiral protoconch of about 3 whorls. Radular tooth ( Fig. 82N ) with the anterior section much shorter than the posterior section. Tooth serrated with 7–8 denticles arranged in one row, ending on a large, pointed cusp. Barb moderate. Blade prominent and pointed, covering about 80–90% of the anterior section of the tooth. Strong basal spur present on top of the very large base. In the phylogeny ( Fig. 2 ), C. (T.) polongimarumai is sister to C. (T.) chiangi .

Figures

Fig. 2. Cox1-based Bayesian phylogeny. Posterior probabilities (> 0.95) and bootstrap values (> 90) from the ML analysis are provided for each node. Intraspecific relationships are collapsed. Subgenus names are indicated on the right.

Fig. 82. A–H. Conus (Taranteconus) chiangi (Azuma, 1972). A. Banc Kaimon Maru, Norfolk Ridge, 231–233 m depth, 16.7 mm. B. Banc P, Norfolk Ridge, 185–207 m depth, 14.9 mm. C. Banc Munida, Norfolk Ridge, 180–220 m depth, 16.1 mm. D. Banc Crypthélia, Norfolk Ridge, 187‒197 m depth, 17.1 mm. E. Norfolk Ridge, 262‒290 m depth, 15 mm. F. Same collection data as for specimen E, 18 mm. G. S New Caledonia, 200 m depth, 14 mm. H. Protoconch of specimen A. – I–L. Conus (Taranteconus) polongimarumai (Kosuge, 1980). I. Banc Munida, Norfolk Ridge, 180‒220 m depth, 20.5 mm. J. Grand Passage, 277‒289 m depth, 19.4 mm. K. Same collection data as for specimen J, 18.9 mm. L. Same collection data as for specimen J, 17.3 mm. – M. C. (T.) chiangi. Radular tooth, specimen from Bohol Island, Philippines, 19.8 mm (MNCN). – N. C. (T.) polongimarumai. Radular tooth, specimen from Pouembout, New Caledonia, 21 mm (Frank Leterrier coll.). Scale bars = 10 mm, unless otherwise stated.

Fig. 84. Bathymetric range and distribution map for Conus (Taranteconus) polongimarumai (Kosuge, 1980). Red circles indicate the points where the species was collected.