Conus (Embrikena) pergrandis Iredale, 1937

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 : 74-76

Conus (Embrikena) pergrandis Iredale, 1937

Figs 2 , 55A–D, M , 56

Embrikena pergrandis Iredale, 1937: 407 , pl. xviii.

Conus fletcheri Petuch & Mendenhall, 1972: 96 , figs 1–2.

Conus (Embrikena) potusmarumai Kosuge, 1980b: 81 , pl. 28 figs 1–4. Conus pergrandis – R̂ckel et al. 1995b: no. 110, pl. 26 figs 16–19.

Embrikena pergrandis – Tucker & Tenorio 2013: 318. — Monnier et al. 2018a: 706.

Material examined

12 lots (12 specimens). See Supp. file 1.

Type material

Holotype SOLOMON ISLANDS • 137 mm; Tahli Bay , New Britain; 55–73 m depth; AMS C.3152.

Figured material

NEW CALEDONIA • 116.4 mm; Loyalty Ridge , off New Caledonia, stn DW391; 20º47′ S, 167º06′ E; 390 m depth; 13 Feb. 1989; MUSORSTOM 6 expedition; MNHN ( Fig. 55A, M ) • 106 mm; Loyalty Ridge , off New Caledonia, stn DW418; 20º42′ S, 167º03′ E; 283 m depth; 16 Feb. 1989; MUSORSTOM 6 expedition; MNHN ( Fig. 55B ) • 114.7 mm; Loyalty Ridge , off New Caledonia, stn dive16; 20º38′ S, 167º02′ E; 509 m depth; CALSUB expedition; MNHN ( Fig. 55C ) • 60.2 mm; along Toupeti , off New Caledonia, stn CP3806; 21°42′ S, 166°34′ E; 307‒309 m depth; 5 Sep. 2011; EXBODI expedition; MNHN ( Fig. 55D ) .

Geographical distribution and bathymetry

Taiwan, Philippines, Papua New Guinea, Solomon Islands and Vanuatu. Also reported from Australia, off Queensland. In New Caledonia it has been found along the east coast, Loyalty Islands and Hunter Island, at depths between 200 and 700 m.

Remarks

Shell large to very large (maximum shell length 160 mm), ventricosely conical, with a moderate spire, slightly sigmoid to concave. Radular tooth ( Fig. 55M ) with the anterior section slightly shorter than the posterior section. The tooth is serrated with 14–15 denticles arranged in one single row. There is a small rounded terminating cusp. Barb well marked. Blade rounded, covering about 50% of the anterior section of the tooth. Basal spur pointing upwards on top of the rather large base. In the phylogeny ( Fig. 2 ), all specimens examined using DNA form a clade representing the subgenus Embrikena .

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. 55. A–D. Conus (Embrikena) pergrandis Iredale, 1937. A. Loyalty Ridge, 390 m depth, 116.4 mm. B. Loyalty Ridge, 283 m depth, 106 mm. C. Loyalty Ridge, 509 m depth, 114.7 mm. D. Along Toupeti, off New Caledonia, 307‒309 m depth, 60.2 mm. – E. Conus (Phasmoconus) armadillo Shikama, 1971. Loyalty Ridge, 420 m depth, 54.9 mm. – F–L. C. (Ph.) kuroharai (Habe, 1965). F. Banc Kaimon Maru, Norfolk Ridge, 233‒259 m depth, 55.4 mm. G. Loyalty Ridge, 275‒295 m depth, 60.1 mm. H. Loyalty Ridge, 257 m depth, 47 mm. I. E Île des Pins, off New Caledonia, 138‒146 m depth, 36.7 mm (MNHN- IM-2013-66069). J. Banc Munida, Norfolk Ridge, 180‒220 m depth, 30.5 mm. K. Same collection data as for specimen J, 20.6 mm. L. Protoconch of specimen K. – M. C. (E.) pergrandis. Radular tooth of specimen A. – N. C. (P.) kuroharai. Radular tooth of specimen I. Scale bars = 10 mm, unless otherwise stated.

Fig. 56. Bathymetric range and distribution map for Conus (Embrikena) pergrandis Iredale, 1937. Red circles indicate the points where the species was collected.