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From New Caledonia and Solomon Islands

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From New Caledonia and Solomon Islands C. VlLVENS Novapex 10(4): 125-163, 10 décembre 2009 New species and new records of Calliostomatidae (Gastropoda: Trochoidea) from New Caledonia and Solomon Islands Claude VlLVENS Rue de Hermalle, 1 13 - B-4680 Oupeye, Belgium Scientific Collaborator, Muséum national d'Histoire naturelle, Paris. vilvens. claude(â skynet.be KEYWORDS. Gastropoda, Calliostomatidae, New Caledonia, Solomon Islands, Calliostoma, Bathyfautor, Thysanodonta, new species. ABSTRACT. New records of 16 known Calliostomatidae species from New Caledonia and Solomon Islands area are listed, extending the distribution area of some of them. Seven new species are described and compared with similar species: Calliostoma (Calliostoma) cochlias n. sp., C. (Fautor) aprosceptum n. sp., C. (F.) diaphoros n. sp., C. (Benthastelena) hexalyssion n. sp., C. (B.) malaita n. sp., C. (Ampullotrochus) tropis n. sp., C. (A.) aporia n. sp. A list of the Calliostomatidae of the Indo-Pacific area is provided with their distribution. RESUME. De nouveaux relevés de 16 espèces connues de Calliostomatidae provenant de Nouvelle-Calédonie et des îles Salomon sont listés, étendant ainsi l'aire de distribution d'un certain nombre d'entre elles. Sept nouvelles espèces sont décrites et comparées avec des espèces similaires : Calliostoma (Calliostoma) cochlias n. sp.. C. (Fautor) aprosceptum n. sp., C. (F.) diaphoros n. sp., C. (Benthastelena) hexalyssion n. sp., C. (B.) malaita n. sp., C. (Ampullotrochus) tropis n. sp., C. (A.) aporia n. sp. Une liste des Calliostomatidae d'Indo-Pacifique est fournie avec leur distribution. INTRODUCTION The présent paper gives a synthetic report on the Calliostomatidae species collected during thèse most New Caledonia. and the adjacent Vanuatu and Fiji récent (cited above) expéditions involving MNHN Islands, has reveal numerous new calliostomatid scientists in New Caledonia and Solomon Islands species since thèse 15 last years: Marshall (1995b) areas. Besides new records for 24 known species, described not less than 27 new species (Calliostoma, which sometimes extends their distribution and/or Thysanodonta, Laetifautor, ...); Vilvens (2005) added introduces some variability of shell characters, 7 new 5 Calliostoma species to this large list (extending to species are described hère. Tonga Islands); finally Vilvens & Maestrati (2006) What also makes fundamental the papers of Marshall described 3 new Thysanodonta from this area. (1995a. 1995b) is his systematic work, after having Ail thèse descriptions were based on a large material created the subfamily Thysanodontinae (Marshall. coming from the French expéditions (Héros et al., 1988) : clarification of the numerous subgenera of the 2007; Vilvens. 2007; Bouchet et al., 2008; Bouchet et genus Calliostoma (while placing some of them in al., 2009) conducted ail around this area for the last synonymy), description of new gênera {Bathyfautor. thirty years by IRD (Institut de Recherche pour le Dactylastele, Selastele, Fautrix) and interprétation of Développement, Paris - ex-ORSTOM) and MNHN Maurea as a subgenus of Calliostoma. This important (Muséum national d'Histoire naturelle, Paris) : works were used, among others, to build a provisional MUSORSTOM and BATHUS, BERYX, BIOCAL, list of the Calliostomatidae of the Indo-Pacific area, BIOGEOCAL, BORDAU, CALSUB, CHALCAL, with their respective distribution, that is provided as CORAIL, HALICAL, HALIPRO, LAGON, LIFOU, appendix at the end of this paper. LITHIST, MONTROUZIER, NORFOLK, PALEO- SURPRISE, SMIB. VOLSMAR. However, the Material and methods calliostomatids material brought by the most récent campaigns (NORFOLK 2, CONCALIS) was not yet The material studied in the présent paper was brought studied. by 5 IRD-MNHN expéditions: NORFOLK 2, Unlike New Caledonia, no régional study about CONCALIS, SALOMON 1, SALOMON 2 and calliostomatids (and even Trochoidea as far as I know) SALOMONBOA 3. from the Solomon Islands has been published in the As the continuation of the NORFOLK 1 campaign last years. The spécifie campaigns leaded again by (6/2001), the NORFOLK 2 campaign (10-11/2003) MNHN and IRD (especially SALOMON 1 & 2, took place around Norfolk Ridge and was mainly SALOMONBOA 3) were therefore welcome to fill dedicated to the study of speciation and endemism this gap. phenomena on the seamounts. The CONCALIS cruise 125 C Vil \l \s Calliostomatidae from New Caledonia and Solomon [slands (4-5/2008) took place in the Grand-Passage and 112004) thaï explored the western part of the Surprises [slands north off New Caledonia's main Solomon [slands, with spécial care for the hard Island and lum focused on deep-water cônes for their bottoms (a bit neglected by SALOMON I ) and for the venom glands. But, among other interesting biological l'aima assoeiated to the "sunken woods". This new material, il also provided an additional valuable interesting topie of the récent years has justified the malacological material, among which some BOA ("Bois coulés et Organismes Associés [Sunken rrochoidea (and especialk Calliostomatidae) were Wood and Associated Organisms]) cruises séries: found. BOA (1 1/2004), BOA 1 (9/2005) and SANTOBOA Ihe SALOMON 1 campaign (9-10/2001) surveyed (10/2006) off the larger islands in northern Vanuatu the deep waters off the central part of the Solomon and southern New Caledonia, and SALOMONBOA 3 [slands (from Guadalcanal to Malaita and Makira). (9-10/2007) lhat operaled off the larger Ibrested lins survej was continued by SALOMON 2 (10- islands of Guadalcanal and Malaita (Samadi, 2009). 155° 60 e 165 70 e 175 ( 5 -»••»» ' » i SALOMON 2 4 Atn. * Tf SALOMON 1 SOLOMON ISLANDS '*** *" k TU \ -, I i - i 15* «V»!^ *AHUATU (ON( AL1S < H ' \ »*> e 20 S. o îiflfc if N o t ! B a s < n ***** mtâ mmC**ào**Vi %mm "t\ c FUI — — —. i 25 l 2 X ORFOLK n0 'PACIFIC*=r*S«£«r !•«• t h - Map 1 : Prospecting areas surveyed in this paper approximate locations of NORFOLK, CONCALIS and SALOMON cruises. 126 C. VlLVENS Novapex 10(4): 125-163, 10 décembre 2009 The range of the known and new species is provided gênerai shape of the shell (depressed, high spired for ail the available spécimens and also for the only - conical, cyrtoconoidal, coeloconoidal); living spécimens if they hâve been found; when thèse shape of the vvhorls (convex, concave, straight - ranges are the same, the common range is cited once with or without shoulder or keel); with the "(living)" annotation; if ail the spécimens are spiral cords of the whorls (onthogeny, number, dead collected. the range is cited with the "(dead)" beads, strength); annotation. Regarding the description methodology, spiral cords on the base (number. beads, distance the main conchological features used are (see Text between); Figure 1 below): shape of the aperture. the outer and the inner lip. Text Figure 1 : Features of Calliostomatidae shells: H : height; W : width; HA : height of the aperture; PI, P2, P3, ... : primary cords; SI, S2, S3, ... : secondary cords; Tl, T2. ... : tertiary cords (shell : Calliostoma (Fautor) chlorum Vilvens, 2005, Fiji, BORDAU 1, stn DW1454, 13.6 x 10.4 mm). Abbreviations BMNH : Natural History Muséum. London. England. NSMT : National Muséum of Science, Tokyo, Japan. Repositories RMBR : Raffles Muséum of Biodiversity Research, IMT : Institute of Malacology of Tokyo, Tokyo, Singapore. Japan. ZMA : Zoologisch Muséum, Amsterdam. The MNHN : Muséum national d'Histoire naturelle, Paris, Netherlands. France. 127 C \ II \l \s Calliostomatidae from New Caledonia and Solomon [slands Other ahbrt-x iations SALOMONBOA 3. stn CP2816, 09°49'S, 161 32'H, 464-819 m. Il : heighl w width Material examined. Solomon Islands. SALOMONBOA 3: stn CP2816, 09°49'S, 161°32'E, 1 1 \ heighl ofthe aperture 464-819 m. I l\ (holotype). I \\ numberof teleoconch whorls PI. P2. P3,...: primai} cords (PI is the most adapical) - Distribution. Only known from the type locality. SI. S2, S3,...: secondai ) cords (SI is the mosl adapical) Diagnosis. A typical rather large Calliostoma species II. 12. T3,...: tertiary cords (numbered following with a rather elevated, conical spire, six strong, appearing order) prominent spiral cords on the last whorl, adapical stn : station granular cords and abapical smooth cords, an almost l\ : live-taken spécimens présent in sample liât base with a large médian smooth area bordered by dd : no live-taken spécimens présent in sample an external and three internai spiral cords, without sub : subadult spécimen umbilicus. juv : juvénile spécimen Description. Shell of médium large size for the genus SYSTEMATICS (height 17.0 mm, width 15.8 mm), higher than wide, conical in shape; spire elevated, height l.lx width, We tbllow hère the classification of Marshall (1995), 3.3x aperture height; angulate periphery; used by Bouchet & Rocroi (2005), where anomphalous. Calliostomatidae, earlier treated as a subfamily of Protoconch 400 pm wide, of 1 whorl, rounded, Trochidae (Hickman & McLean, 1990), are ranked as covered by a network of ridges producing polygonal a family of superfamily Trochoidea (besides true areas; apical fold nearly straight with a rounded, Trochidae and Solariellidae), vvith the two subfamilies clearly visible terminal varix. C'alliostomatinae and Thysanodontinae. Teleoconch of 7.0 whorls; whorls straight except convex last whorl, without keel. Suture visible, not Superfamily : TROCHOIDEA Rafinesque, 1815 canaliculated. First whorl convex, sculptured by axial, Family : CALLIOSTOMATIDAE Thiele, 1924 weakly prosocline, strong threads and 3 spiral cords; Subtamily : CALLIOSTOMATINAE Thiele, 1924 PI, P2 and P3 appearing
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