The Genus Volvarina (Volutacea: Marginellidae) in Brazil. Part
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BOYER Volvarina in Brazil NOVAPEX 1 (2) : 35-55, 20 juin 2000 The genus Volvarina (Volutacea : Marginellidae) in Brazil. Part 1 : revision of the species described by A. Bavay, and closely related species Franck BOYER 1 10, Chemin du Marais du Souci, 93270 Sevran, France KEYWORDS. Marginellidae, Brazil, Volvarina, taxonomy, type matenal, phylogeny. ABSTRACT. Six Brazilian species of Volvarina described by A. Bavay are revised, together with a recently described related one. Two new species of Volvarina are described. The phylogeny of Brazilian Volvarina is tackled. RESUME. Six espèces brésiliennes de Volvarina décrites par A. Bavay sont révisées, ainsi qu'une espèce apparentée récemment décrite. Deux nouvelles espèces sont décrites. La phylogénie des Volvarina brésiliennes est abordée. INTRODUCTION In 1985, E. C. Rios tentatively performed the only gênerai faunistic inventory of Brazilian marginellids. The Brazilian fauna of marginellids remains poorly After the study of the correspondant iconography, known, despite the great diversity presented by the and a comparison with the available material stored new phenae brought to hght by local collectors over in European public and private collections, we can many years. Most of thèse phenae are provisionally state that the Brazilian fauna of marginellids, as attributed to Caribbean taxa, depending on very presented in Rios, shows only very superficial superficial similarities. This practice tends to similarities with the fauna known from the Caribbean dissuade further investigations about taxonomic or Sea. biogeographic aspects. Concerning the genus Volvarina s. s., just one single Very few species were described from Brazil well-known species from the Caribbean Sea can be subsequently to those described by Bavay at the confirmed as belonging to the Brazilian fauna. This beginning of the rwentieth century : species, Volvarina avena Kiener, is represented - One large Prunum (Marginella matthewsi Van Mol throughout the whole Caribbean area by important and Tursch, 1967), one large Dentimargo populations in shallow and moderate depths, whilst {Marginella cloveri Rios and Matthews, 1972) and just known by scarce spécimens from the Brazilian one tiny Volvarina {Prunum amphorale de Souza, coasts. 1992), ail of them from equatorial zones, in moderate Ail the other named Caribbean species belonging to depths. the genus Volvarina s. s. and proposed by Rios as - One médium sized Volvarina {V. pontesi Rios and inhabiting Brazil, are invalidated by his figures, and Leal, 1993) from bathyal levels, off Southeast Brazil. it would hâve been more correct to hâve considered Récent records confirm that an important number of them as non-described endémie species from Brazil. tiny to large marginellid species are still to be This applies to the following références no. 528 (as discovered along the thousands of kilometers of P. amabilis Redfield), no. 530 (as P. bella Conrad), Brazilian coasthne. However, their study cannot no. 544 (as V. albolineata d'Orbigny), no. 546 (as V. senously be undertaken without a prehminary avenacea Deshayes = junior synonym for V. avena revision of the available taxa, the comparison of Kiener), no. 547 (as V. gracilis C.B. Adams, linkable populations, and a reliable knowledge of proposed by Rios as a senior synonym of M. joubmi both their géographie and bathymétrie distribution. Bavay = V. bahiensis Tomlin). By reviewing the taxonomic status of species The occurrence of V. gracilis C.B. Adams in Brazil belonging to the genus Volvarina sensu stricto whose remains to be verified, as explained below, and V. identity remains in doubt, ît is hoped to help to bahiensis Tomlin is not the same species (cf. clarify the documentation concerning Brazilian discussion on V. bahiensis). On the other hand, marginellids, and to encourage further research on référence no. 524 in Rios is to be confirmed really to their biogeography and phylogeny. This paper is deal with the genus Dentimargo, as the flexuous mainly devoted to the species described by A. Bavay labrum of the figured shell better suggests a from 1906 to 1922. Volvarina species. As demonstrated below, several 35 Bou k The genus Volvanna in Brazil Novapex 1 (2) : 35-55, 20 juin 2000 bjdl\ knowo species of Volvanna reaching a length SYSTEMATICS of 2 ta 4 nun are living along the Brazilian coasts, and référence no. 524 just could be a non-described Genus Volvanna Hinds, 1844. one Type species Marginella nitida Hinds, 1844 Référence no 54°- îs compared to V. roberti Bavay, (subséquent désignation by Redfield, 1871), junior firom Made'ira, Northwest Afnca. However, figure synonym of Volvanna mitrella (Risso, 1826). l M > clearly represents a shell of V. serrei Bavay, described from Brazil, the latter species also being Volvarina perrieri (Bavay, 1906) illustrated and correctly named under the référence Fig. 1 - Ibis. no. 550. It is noted that the name of V. lactea Kiener is Marginella (Volvarina) perrieri Bavay, 1906, pp. proposed under the référence no. 548 and illustrated 248-249, pi. 7, figs 5-6. b\ a shell of Hyalina pallida Linnaeus, which belongs to a différent non-radulate genus (even if Type material. probably a distant relative of the complex Prunum Volvanna). H. pallida is common ail around A. Four syntypes in MNHN (type collection), in 2 the Caribbean province, in rubble or sand, and it can lots : - occur in very shallow water in sheltered Lot 1 : 3 shells (sized 10.8 x 4.3 mm to 10.3 x 4.2 environments. The species may not be rare in Brazil, mm) deposited by Bavay with two labels, one of but local collectors do not employ methods for them bearing the inscription "type figuré. I. collecting microshells in shallow environments. Malouines. Expéd. de La Vénus 1839". - Six spécifie taxa belonging to the genus Volvanna Lot 2 : 1 shell (sized 10.5 x 4.2 mm) from the s s were described by Bavay : V. perrieri 1906, V. Jousseaume collection, erroneously labelled serrei 1913, V. joubini 1913 (preoccupied and "Marginella perrieri Rochebr." renamed V. bahiensis by Tomhn, 1917), V. germaini B. One syntype in IRSNB, from the Dautzenberg 1913, V.perexilis 1922, V.pupa 1922. collection, labelled in the hand of Bavay "VolV The first species is described from material obtained perrieri Bavay. Voyage de La Vénus 1839. I. by Dupetit-Thouars during the campaign of the ship Malouines. Muséum". La Vénus in 1836-1839. The three next species were obtained by Mr P. Serre, correspondent of A. Bavay Original description. in Salvador de Bahia. The last two species were (Translated from French) found in Jousseaume collection, dredged off Parahyba. "Shell of poor length, slender fusiform, particularly It is proposed to review hereunder thèse supposed bulging in its upper part; spire well apparent rounded endémie species, accepting ail of them in the genus conoid, with an obtuse top, made of four whorls; the Volvanna, sensu Gofas (1989, p. 160). In the course last whorl of the shell raising clearly around the of this study, some related phenae are studied, and aperture; this one triangular very slender, larger on two new species are described. the base which is obliquely rounded; nght border extemally thickened and slightly curved inwards ail Abbreviations along its médium part; columellar border bearing on its base four somewhat délicate oblique plaits. IRSNB : Institut Royal des Sciences Naturelles de Colour transparent porcellaneous white but Belgique, Brussels. suggesting however three very faint shades of fawn MCZ : Muséum of Comparative Zoology, Harvard bands on the dorsum of the shell." Umversity, Cambridge, USA. As noted by Bavay, the shells of V. perrieri look like V. avena (Kiener, 1834). MHNG : Muséum d'Histoire Naturelle de Genève, the well-known Caribbean Switzerland. Bavay, however, establishes the identity of V. slight différences with V. avena, MNHN : Muséum National d'Histoire Naturelle, perrieri through Paris. having a less slender shape, thinner and more oblique subtranslucid whitish colour. MNRJ : Museo Nacional do Rio de Janeiro, Brazil. columellar plaits, and a correctly match the description, even MORG : Museo Oceanogrâphico do Rio Grande, The syntypes Brazil. for the average size (given as 1 1 x 5 mm by Bavay). NNM : Nationaal Natuurhistonsch Muséum, Leiden, the Netherlands. Type locality. (Falklands). Coll. F.B. : Collection of the author. Malouines Insulas 36 BOYER Volvarina in Brazil NOVAPEX 1 (2) : 35-55, 20 juin 2000 Remarks. In fact, the so-called new species quoted by Bavay from the French magellanic expédition are V. hahm None of the located syntypes hâve a small hole on (Mabille, 1884) and V. dozei (Mabille and the ventral side of the last whorl, just near the anal Rochebrune, 1889), both found between the Straight canal, as pictured in the type figure (Fig. la, b). of Magellan and the Falklands, at a depth of 120 m. However, the origin of syntypes housed in MNHN V. hahni Mabille is clearly a junior synonym of V. and IRSNB îs beyond doubt. Bavay specified that warreni (Marrât, 1876) as confirmed by the study of several samples coming from the expédition of La the four syntypes stored in MNFTN - Type collection. Vénus were represented in the Pans Muséum, The high-spired V. dozei does seem really to be a without stating precisely how many. It seems différent species, and clearly belongs to the same probable that more than five shells belonged to the "subantarctic group" of V. warreni which holds original lot. As the rediscovery of the figured type numerous phenae and possible species recorded from and potential holotype remains possible, it seems southern latitudes off South Africa and off Australia better for now to avoid the désignation of a lectotype, and New Zealand. Amongst thèse species is and wait for further investigations in French and numbered Volvarina pontesi Rios and Leal, 1993, Bntish collections where spécimens from Bavay are fished off Southeast Brazil in 200 to 1,140 m, and currently found.