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Gastropoda)Reeently Dredged in the South-Western Indian Oeean-II

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Gastropoda)Reeently Dredged in the South-Western Indian Oeean-II The malacologicalsocietymalacological society ofJapanof Japan fire VENUS Jour. Malac.) VoL 44, No. 4(Jap.(1985):239-248 ]ii2iEi 7･ ]i?2f Fki iZti suS rb i6t51fi g 2Lk7 .=l=)b'-d'N-U. P7 7. ij 7-7V Report on Murieidae (Gastropoda)Reeently Dredged in the South-Western Indian Oeean-II. List of Species with Remarks and Illustrations* Roland HOUART (St. Jobsstraat, 8, B-3330 Landen (Ezemaal) Belgium; Seientific Collaborator at the Institut Royal des Scienees Naturelles de Belgique) Part I is dealing with the deseription of eight new speeies (Ven7ts, 44(3) : 159-171) ineluded in 3 different subfamilies: Muricinae, Muricopsinae and Typhinae. This second and last part is t･he cornplete listing ef collected species areund the islands of Madagasear, R6union, Mauritius and the Seychelles, except the 8 new species previously deserihed. Introduetion, material studied and ucknowledgements are included in the first paTt. Family Muricidae Rafinesque, 1815 Subfamily Muricinae Rafinesque, 1815 Murex (Murex) brevisptna Lamarck, 1822 Materia･l: Tu16ar St. 889, Southern passage Tulear lageon, inner slope of Grand R6eif, 10-13m, lspm. Mitrerc (M-uTex) peeten Lightfoot, 1786 Material: MD32 St. FA39, 21021'S, 55e28'E, 70 m, 1spm. Mu,rex (M'urex) trapa R6ding, 1798 Material: Tu16ar, St.658, dredging outer Grand Recif slope, 112m; St.697, "Pointe Grand R6cif, S. SerpenV', inner reef flat, 8spms.; St.820, S. passage Tul5ar lagoon, inner slope of Grand Recif, 10-13 m, 1 spm.; Reves 2, St. 9, 04056'S, 55034'E, 48 m, 1sh; St. 37, 04e35'S, 55012'E, 65 m, 2spms. M･errex (Murex) sp. Material: MD32 St. CP43, 21e21'S, r,5027'E, 73-77 m, 1sh; St. DC54, 21006'S, 55a13'E, 80-83 m, 1 sh; St. DC56, 21005'S, 55e13'E, 170-225 m, 1 sh. * Accepted:July 15, 1985 NII-Electronic Library Service TheThemalacological malacological society of Japan 240 VENUS: Vol. 44, No.4(1985) Only 3 dead specimens were dredged. Apparented to Murex kiiensis Kira, 1969, known from Japan to the Philippines, it differs mainly by its different proto- coneh. This shell was also illustrated by D'Attilio (1981: figs. 1,2,3). Ponder and Vokes are preparing a monograph of the genus Murex s.s. in which this form will be named. Murex (Haustellum) hausteU･um Linnaeus, 1758 Materiat: Tul･ear, St,330, outer slope Grand Reeif, Antseteky region, 55-61 m. 2 spms; St. 737, S. passage Tulear lagoon, 12 m, 1 spm ; St. 820, S. passage Tulear lagoon, inner slope m, spm. Grand R6cif, 10-13 1 Chicoret{s (Chicoreus)banksii (Sowerby, 1841) Materiat: Reves 2, St. 4, 05008'S, 56"35'E, 32 m,1spm; St. 16, 05036'S, 56056'E, 55m; St.20, 05e36'S, 56019'E, 35m, 1spm; St.27, 04e56'S, 54e58'E, 52rn; St. 37, 04035'S, 55012tE ,65 m. Chicore･zts (Chicoreus) groschi Vokes, 1978 "Pointe Material: Tu16ar, Grand R6eif, Serpent", inner reef flat, 1spm. ChicoTeus (Chicoreus) Tamosus (Linnaeus, 1758) reef Materiat: Tul6ar, St,497, R/6cifSongoritelo, flat, lspm; St.687, Grand `tGrande Reeif, near Vasque", reef flat, 1spm; St.842, Grand R6cif, reef fiat, "Pointe 1 spm; St. 890, Grand Recif Serpent'', inner reef fiat, 1 spm; St. 901 bis, Northern Grand R6cif, reef flat, 1 spm. Chicoreus (Chicoreus) saulii (Sowerby, 1841) Material: Benthedi, St. 113R, 12022'S, 46D27'E, Bane du Geyser, 5-35 m, 1spm, Chicoreus (ChieomuTex) laciniatus (Sowerby, 1841) Masteriat: Reves 2, St.17, 05043'S, 56039'E, 58m, 2spms; St.23, 05016'S, 38m, 55041'E, 45m; St.24, 05[)09'S, 55025tE, 35m; St.31, 04e36'S, 54e20tE, 65m, 3spms; 55a59'E, 50m, 1spm; St,37, 04035'S, 55012tE, St.47, 04e03tS, 1 spm; MD32, St.DC56, 21005tS, 55e12'E, 170-335 m, 2 spms; St. DC176, 21e02'S, 55Dll'E, 165-195 m, 1 spm. This species has never been recorded from the SW Indian Ocean. Cernohorsky eited and (1967:119) it from the Fiji Islands to the Philippines Japan. Fair "Indo-Pacifid' (1976:53) and Vokes (1971:63) both indieate but with no further indieations; while Radwin and D'Attilio (1976 : 90) gives the Philippines to Northern Queensland (Australia) as geographical distribution. The latter authors incorrectly synonymised Murex 2'iekelii Tapparone-Canefri, 1875, a Naquetia frem the Red Sea. NII-Electronic Library Service The malacologicalsocietymalacological society of Japan Houart: Muricids in SW Indian Ocean-[, 241 Pterynottts (Pterynotus) albobrunneus Bertsch and D'Attilio, 1980 (Fig. 1) Material: Reves 2, St.11, 05U05'S, 55053'E, 55 m, 1spm. The type loeality of this recently named speeies is the Laccadives Islands (approximately 11030'N, 73000'E). The present locality is not unexpeeted, although P. albobrunnetts has never before been recorded from the Seychelles. This species is distributed in the Western Indian Ocean: North Mozambique [Vokes, 1978: 397, pl. 6, fig. 3 as Pterynotus (P.) sp. cf. pell･ucidus (Reeve)] the Seyehelles, the Laceadives (type locality) and eoast of Oman (Besch and Bosch, 1982: 89). Pterynotus (PteTynotus) loebbecleei (Kobelt, 1879) Material: MD32, St. CP172, 20e52'S, 55e38'E, 105-120 m, 1sp. Aspella platytaevis Radwin and D'Attilio, 1976 (Fig. 3) Material: MD32, St.FA39, 21021'S, 55028'E, 70m, lsh; St.DC41, 21e2VS, 55e27'E, 75m, lsh; St.DR47, 21e23'S, 55037'E, 205-215m, lsh; Tu16ear, St. 238, Grand R6cif, outer reef slope, Ankaradanva region, 12m, 1 sh. This is a range extension for this recently deseribed species, only known till now from the Palau Islands, Western Caroline Islands and Western Australia (type loeality). Radwin and D'Attilio (1976: 224) gave a maximum length of 14 mm. The speeimen from St. FA39 measures 17 × 7.1 mm. Aspella vekesiana HouaTt, 1983 (Fig. 4) Material: Tulear, Grand R6eif, outer reef slope, 36 m, 1spm (holotype). This recently named speeies differs from all other members of Aspelea, mainly by its different intritaealx and appressed suture. Dermomurex (Dermom2trex) sp. (Fig.5) MateTial: Benthedi, St. 8, 11e29'S, 47e18'E, W. Iles Glorieuses, dredge, 250m, 1 spm. No Der7zaomurex s.s. has ever been reported from the West Indian Ocean and the shell seems different from other related species. As there is a single juvenile specimen, only illustration of this specimen is shown here at this time. NII-Electronic Library Service The malacologicalsocietymalacological society ofJapanof Japan 242 VENUS: VoL 44, No. 4 (1985) Subfamily Muricopsinae Radwin and D'Attilio, 1971 Favartia (Favartia) crouchi (Sowerby, 1894) (Figs. 11-12) Material: Benthedi, St.5, 12"32'S, 47e40'E, W. Bane of Leven, dredge, 35- 150m, 1spm; Tulear, St.156, Grand R6cif, euter reef slope, northern seetor, 5 m, 1 sh. After reading the original deseriptions and examination of photograph of both types, I consider here P. gztamensis Emerson and D'Attilio, 1979 as a possible junior synonym of F'avaTtia erouehi (Sowerby, 1894). One cannot be absolutely sure of this synonymy until specimens of both species could be seriously eom- pared; F. c･reTtchi is a slighUy larger shell and study of its protoconch would be necessary. Unfortunately none was preserved. Originally described from Mauritius, F. cTo･uchi has a wide Indo-Pacific distribution: it is also known from Guam (type loeality of F. gi.tamensis) and Tahiti (Anonymous, 1979: 6, erTone- ously illustrated as Fainrtin ?peasei). fiiavartia (Favartia) garrett･ii (Pease, 1868) (Figs. 6, 6B) Materiat: MD32, St. DR47, 21e23'S, 55037'E, 205-215 m, 1 sh; St. DC'56, 21005'S, 55e12'E, 6 shs; St. DC85, 21000'S, 55015'E, 58-70 m, 37 shs; St. DC178, 21002'S, 55ell'E, 165-195 m, 1 sh. AIthough IFT. gaTTettii was originally described from Hawaii, I could not separate the Indian Ocean shells from typical Hawaiian specimens; this means a eonsid- erable range extension. Another related species which eould be the same is Favartia･ nata･tensis (Smith, 1906) but this needs further studies, i7'a.vaTtia･ (Favartia) o'tLclithae D'Attilio and Bertseh, 1980 (Fig. 9) Material: Reeves 2, St.11, 05005'S, 55053'E, 55 m, 1spm; Tu16ar, outer reef slope, 27 m, 1 spm; 28 m, 1 spm. A geographical range extension. The type and so far only known locality of this Figs.1-13.SW Indian Ocean Muricidae. 1. Pterynotus albobr"nneus, Seycherles, 23 × 12.4 mm. 2-2A. Ilygmaepterys fttnof"tiensis, Tulear, 5 × 2.8mm [.2A, × 301 3. Aspella piatylaevis. R6union, 11.7× 5.9mm. 4. Aspella veleesiana. Tul6ar, holotype, 14 × 6. Imm. 5. Dermomurex sp., N. Mozambique Channel, 11 × 5,9mm. 6-6B. F2ivartia garrettii, R6union, 8.5X5,lmm (6A-6B, X25). 7. havartia salmonea, Tu16ar, Madagascar, 16,5X10mm. 8. Murex salmoneus. Syntype BMNH 1899.2. 23.24. 12 X7.1rnm. 9. Eavartia iudithae, Seychelles, 18.8X13mm, le-10A. Trophenopsis polycyma, N. Mozambique Channel, 8, 9 × 4. 9mm [10A, X30). 11. Favartia crouchi, N, Mozambique Channel, 9,2X5.2mrn. 12. Murex crouchi. s.yntype BMNH 86, 2.10.32, 15X8.3mm [lphotograph courtesy Dr. Vokes). 13-13A. Trophonopsis ziciac. N. Mozambique Channel, 7 × 3.2rnm (13A, × 30]. NII-Electronic Library Service The malacologicalsocietymalacological society ofJapanof Japan HouarttMuricids in SW IndianOcean- ll . 243 2 ''t''i' 1i! f t ' ' t .'M l-' r.,. -,' ii/IIII.i//･-: ,//r/1.:Tt'･tl).,//,' tt tt.. t:･･ --.t･t･,-.･･.･.. t-.. .-t,/:.r- ･ e-AS .1.->2A 1 l 6A ll 1 4 .r v=-.L..---?6B t' NII-Electronic Library Service The malacologicalsocietymalacological society of Japan 244 VENUS: Vol, 44, No. 4 (1985) & 8 --- 10A :],1:13A 12 NII-Electronic Library Service The malacologicalsocietymalacological society of Japan Houart: Muricids in SW Indian -II. Ocean- 245 species being the Philippine Islands. i7'avaTtia salmonea <Ii'avartia･) (Melvill and Standen, 1899) (Figs. 7-8) Material: Reves 2, St.
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