Contribution to the knowledge of Triviidae XXII. New species in the genus Trivellona Iredale, 1931

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1 SPIXIANA Münhen, August 12 ISSN Contriution to the knowlege of Triviie XXII. New speies in the genus Trivellon Irele, 1931 (Mollus, Gstropo) Dirk Fehse & Jozef Grego Fehse, D. & Grego, J. 12. Contriutions to the knowlege of Triviie XXII. New speies in the genus Trivellon Irele, 1931 (Mollus, Gstropo). Spixin 35 (1): 1-8. Two new speies of the genus Trivellon Irele, 1931 Trivellon pulhr spe. nov. n Trivellon enrioshwei spe. nov. re esrie from the Philippines n Est Chin Se. The new speies re thoroughly ompre with their ongeners Trivellon oplin (Kuro & Cte in Cte, 1979) n Trivellon shepmni (Shiler, 1941). Trivellon pulhr spe. nov. is espeilly istinguishe y its unique riing n outline. Trivellon enrioshwei spe. nov. iffers y the ovte shell outline with nrrow perture. Speies of the genus Trivellon re eep wter Triviie minly known from the entrl Ino-Pifi. Dirk Fehse, Nippeser Str. 3, Berlin, Germny; e-mil: irk.fehse@rohe-shwrz.om Jozef Grego, Limová 23, Bnská Bystri, Slovki; e-mil: jozef.grego@evonik.om Introution Reently, our revisions of the fossil n Reent speies of Trivellon Irele, 1931, n interesting group of eep wter Triviie were pulishe (Fehse & Grego 04, 09). We stuie ll types of living n fossil Trivellon speies esies of severl hunres of itionl shells. We note the existene of new tx n mentione them s Trivellon sp. inent. A to E (Fehse & Grego 09: pl. 10, fig. 47; pl. 11, figs 49, 50; pl. 15, figs 61, 62; ppenix IV, fig. U). We restrine to esrie these speies euse only less thn five speimens were ville to onfirm the intrspeifi vriility. In the mentime itionl speimens of Trivellon sp. inent. C were foun in the eep wter of Aliguy Isln, Philippines n oul e otine y the uthors. This speies is esrie in this stuy s Trivellon pulhr spe. nov. It is very ttrtive speies with fine n numerous, lose-set ris n oloure terminls. Severl ozens of speimens of nother unesrie Trivellon speies were rege from eep wters of the Est Chin Se. These speimens re similr to Trivellon shepmni (Shiler, 1941) n inue omprison se on type mteril in whih we hve foun the ifferenes to e onsistent. Therefore, we hve eie to esrie the new txon s Trivellon enrioshwei spe. nov. The genus Trivellon mintins the worl reor size mong the Triviie with lmost 50 mm ut lso smll speies of 5 mm re known (Fehse & Grego 07). Their shells possess uniquely shpe nl n siphonl nl n shrply ege outer lrl mrgin. They first ppere in the Tethyn Erly Mioene of Ini, Jpn, Inonesi n espeilly southern Austrli. Living speies our in the tropil Ino-Pifi in epths from to more thn 700 m (Dolin 01). The gretest iversity is oserve in the eep wters of New Cleoni n the Philippines. Live speimens hve een oserve on vriety of sustrtes s orse n fine sn, on orl sn, silt, smll pele, tunites n roks. Most speies hve white shell, few re eige to rown. Unfortuntely, the soft prts n the iology of most speies re still 1

2 unknown. Up to now the western Inin Oen n the Re Se re lmost white gp onerning the ourrene of Trivellon speies. However, further reserhes will surely proue lrger numer of new speies euse few shells re known to the senior uthor. Aitionl informtion is given in Fehse & Grego (09). 115 E 1 E N 15 N Arevitions DFB JGS MBI RMNH 10 N ZMS oll. Dirk Fehse, Berlin, Germny oll. Jozef Grego, Bnsá Bystri, Slovki oll. Mrty Bels, Inglewoo, U.S.A. Nturlis, Leien, The Netherlns (Rijksmuseum vn Ntuurlijke Historie) Zoologil Museum, University of Amsterm, The Netherlns Bvrin Stte Colletion of Zoology, Germny LT CT RR L W H numer of lrl teeth numer of olumellr ris numer of orsl ris length of shell in mm with of shell in mm height of shell in mm ZMA Txonomy Trivioie Troshel, 63 Triviie Troshel, 63 Triviine Troshel, 63 Trivellon Irele, 1931 Type speies: Trivellon exels Irele, 1931 y monotypy. Detile esriptions of the genus re given in Fehse & Grego (04, 09). Trivellon pulhr spe. nov. Figs 2-6 Trivellon sp. inet. C Fehse & Grego 04, 09: pl. 15, fig. 61. Types. Empty shells were rege t Aliguy Isln, ner Dipolog, Minno, Philippines in epths of 150 m in rule. Holotype: ZSM Prtypes: No. 1: DFB ; No. 2: DFB ; No. 3: DFB ; No. 4: DFB ; No. 5: DFB ; No. 6: MBI T09; No. 7: JGS T0190; MBI T0199. All mteril omprises empty shells from type lolity tht were otine from ifferent relile soures E Trivellon pulhr 5 N N km Fig. 1. Distriution of Trivellon pulhr spe. nov. within the Philippines. Desription Shell meium size (see Tle 1), lightweight, somewht frgile, gloose. Spire slightly elevte, overe with terminl ris. Boy whorl somewht pyriform, gloose, roune, pproximtely 90 % of totl shell height; nterior terminl proue, tip inente; posterior terminl slightly so. Anl nl inente. Dorsum evenly roune, highly elevte, ompletely overe y very fine, lose-set ris with slight mi-orsl epression; osionlly ris isete mi-orslly. Ventrum onvex, with terminl ollrs stright. Aperture reltively nrrow, urve espeilly towrs the nls. Lrum nrrow, stright t its mi-portion, urve nteriorly n posteriorly, posteriorly projeting, rounly keele on ventrum, nteriorly flttene, ering on its inner mrgin fine entiles. Outer lrl mrgin ngulrly lluse with shrp rige on shouler n with posterior-most lrl entiles projete. Siphonl n nl nls following shell profile; orere pilly y wek n pilly y lrge ventrl sie wll. Columell nrrow, stright, tpering steeply inwrs, without rinl rige. Prietl lip rounly lluse, slightly projete, nteriorly rige, ering fine ris, whih eome even finer, slightly osure onto the olumell. Fossul short, roly onve, not lerly elimite from the rest of the olumell. Inner fossulr ege slightly protruing. Figs 2-6. Trivellon pulhr spe. nov. 2. Holotype, ZSM, / oll. No Prtype 1, DFB, oll. No , slightly suult. 4. Prtype 4, DFB, oll. No Prtype 6, MBI, oll. No. T Prtype 8, MBI, oll. No. T0199., right lterl view;, orsl view;, left lterl view;, ventrl view.

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4 Fig. 7. Trivellon shepmni (Shiler, 1941), letotype [fter Cte 1979]. Shell olour white with terminl ollrs ple re-rown. No informtion ville on soft prts n rul. Vrition. The ville shells re very uniform in their pperne (Tle 1). Their infltion vries it. The inner fossulr mrgin is more or less protrue. The numer of orsl ris vries etween n 44, of lrl entiles etween 25 n 29, of prietl ris etween 23 n 27 n of terminl ris tht over the spire etween 5 n 7. Etymology. From the Ltin jetive pulher, mening eutiful. Distriution. Only known from the type lolity (Fig. 1). Disussion Trivellon pulhr spe. nov. is similr to Trivellon oplin (Kuro & Cte in Cte, 1979) onerning its fine n lose-set riing, ut the new speies iffers in severl spets of the shell morphology. Tle 1. Dimensions of Trivellon pulhr spe. nov. Length refers to the gretest nterior/posterior mesurement. refers to the gretest lterl (left-right) mesurement with the shell t rest on the ventrum. Height refers to the mximum gloosity from the ventrum through to the orsl extremity. Columellr respetively lrl entiles t the nterior n posterior en of the prietl respetively lrl lip hve een ounte s full teeth. The ount of the orsl ris follows the efinition y Shiler (1933: p. 288, text-fig. 6) Speimens (tlogue numers) ZSM DFB DFB DFB DFB DFB MBI T09 JGS T0190 MBI T Length With Height CT LT RR H P1 P2 P3 P4 P5 P6 P7 P8

5 Trivellon oplin hs pyriform shell outline with oth terminls proue, wheres T. pulhr hs very hrteristi ovte shell outline with the posterior terminl only slightly proue. The riing is even finer in the new speies. The shpe of the lrum n perture iffer. Trivellon pulhr spe. nov. possesses projeting lrl entiles t the posterior-most outer lrl mrgin. The fossul is shorter n its inner mrgin is more protrue in the new speies. Other speies of similr shell size re Trivellon eos (Roerts, 1913), Trivellon kiiensis (Kuro & Cte in Cte, 1979) n Trivellon finleyi (Bels, 01). In ll of these tx the riing is orser n/or less lose-set. The speil riing mkes T. pulhr unmistkle. Trivellon eos n T. finleyi hve orsl sulus, wheres the new speies shows osionlly just slight epression. Our reserhes hve shown tht Trivellon sioge (Shepmn, 1909) hs sometimes fine riing too, ut the shell is smller rehing mximum of 13 mm in length, wheres the length of fully mture shells of T. pulhr strts t minimum of 12 mm. The shell outline istinguishes oth speies immeitely, euse T. sioge hs pyriform shpe shell n T. pulhr n ovte one. Aoring to their outline, the oy whorl is su-tringulr in T. sioge n semi-irulr in T. pulhr. Trivellon sioge oes not show even orsl epression n the orsum is often higher elevte thn in T. pulhr (T. sioge up to 75 % vs. T. pulhr up to 70 %). The shells of T. sioge re uniformly white, wheres those of T. pulhr hve ple re-rown terminl ollrs in live tken or fresh e speimens. Trivellon syzygi Dolin, 01 off Norfolk Rige, 23 41' S 8 00' E, S New Cleoni (Dolin, 01: 8, figs 19, 19, 38, 38) is only t first sight similr to T. pulhr. However, their shell shpes iffer onsierly. The new speies is more inflte n ovte, lmost spheril, wheres T. syzygi is rther pyriform. The ris in T. pulhr re lso finer n the lrum is lesser thikene. The shell of T. syzygi is lwys white, while the terminl ollrs of T. pulhr re ple re-rown. 115 E 1 E 125 E 25 N N 15 N 10 N Trivellon enrioshwei 5 N 0 5 S N km 10 S Fig. 8. Distriution of Trivellon enrioshwei spe. nov., type lolity;, further finings. Non Trivellon shepmni (Shiler, 1941) Dolin 01: 9, text figs, [= Trivellon elsi Rosenerg & Finley, 01]. Non Trivellon shepmni (Shiler, 1941) Fehse & Grego 04, 09: pl. 3, figs 14- [= Trivellon enrioshwei spe. nov. herein]. Types. Letotype: Est of Silus-Besr, Pternoster Islns, Netherlns Est Inies; in up to metres of wter; orl n Lithothmnion ottom (Shepmn 1909: 140). Prletotypes: Stt Siog Expeition , Philippines, Sulu Se; ' N, ' E, stony ottom, rege t 5 m;.vi.99. (Shepmn 1909: 140), Nturlis Leien, RMNH, Mol Remrks Trivellon shepmni (Shiler, 1941) Fig. 7 Trivi sioge form minor Shepmn, 1909: 140, pl. 11, fig. 4 [nme preoupie]. Pseuotrivi shepmni Shiler, 1941 Cte 1979: 35, pl. 9, figs 35, 35. Trivellon shepmni (Shiler, 1941) Fehse & Grego 04, 09: 29, pl. 4, fig. 21, pl. 6, fig. 29, pl. 8, fig. 39; ppenix IV, figs S.1, S.2. Shepmn (1909: 140) lrey note ifferenes mong his type speimens of Trivellon sioge when he wrote, Two speimens from Stt. 95 re still smller, eing only 7 1/2 Mill. in length,... the ris re slightly orser, the teeth of the right mrgin less numerous (15 n ),... I prefer to keep them uner one nme with the vriety [minor], inste of esriing new speies.... The nme Trivi minor, however, ws preliminry homonym eing 5

6 preoupie y Trivi pulex vr. minor Dutzenerg, 89. Shiler (1941: 74) renme Shepmn s Trivi minor s Pseuotrivi shepmni without exmining the type speimens. We onfirme Shepmn s oservtions (Fehse & Grego 04: 30). The letotype (esignte y Cte 1979) of Trivellon shepmni ws re-esrie in Fehse & Grego (04). Aitionl speimens of T. sioge n T. shepmni were ientifie n stuie espeilly from off Aliguy Isln ner Dipolog, NE Minno, Philippines (Fehse & Grego, 04). Shepmn s prletotypes 1 to 3 (ZMA n ZMA ) of Trivi sioge Shepmn, 1909 were provisionlly ssigne to Shiler s T. shepmni. In 04 we lrey oserve the inflte shells of the prletotypes, ut we expline them s intrspeifi. Also now we oul se our reserh on the letotype of T. shepmni only on the photos in Cte s review of the Triviie (1979: pl. 9, figs 35, 35), euse the letotype is still not returne sine 01 (pers. omm. with H. Dekker n R. Mooleneek, Mrh 11). The exmine prletotypes 1 to 3 of T. shepmni re onsistent with the Chinese shells tht re stuie herein (see elow). Sine 04, severl ozen further speimens of T. shepmni oul e stuie n the istinguishing fetures re persistent (see elow) to the new speies. Therefore, the new txon is esrie in this stuy s Trivellon enrioshwei spe. nov. Trivellon enrioshwei spe. nov. Figs 9-12 Trivellon shepmni (Shiler, 1941) Fehse & Grego 04, 09: pl. 3, figs 14-. Types. Holotype: ZSM , 15' N ' E, off Ximen (prov. Fujinn), ner Chilwei Isln, E Chin Se; trwle t 0 m epth. Prtypes: Nos. 1-2: Stt. 95, ' N., ' E, Sulu Se, 5 M, Stony ottom (Shepmn 1909: 140), ZMA ; No. 3: Est of Silus-Besr, Pternoster Islns, Netherlns Est Inies; in up to metres of wter; orl n Lithothmnion ottom (Shepmn 1909: 140), ZMA ; Nos. 4-5: Off Ximen, ner Chilwei Isln, E Chin Se; trwle t m; Nos. 6-8: Off Ximen, ner Chilwei Isln, E Chin Se; rege t 0 m on grvel n sn; Nos. 9-13: Off Ximen, ner Chilwei Isln, E Chin Se; trwle t 0 m. All mteril omprises empty shells from type lolity tht were otine from ifferent relile soures. Desription Shell smll size (see Tle 2), lightweight, somewht frgile, gloose. Spire overe y terminl ris. Boy whorl somewht semi-irulr, gloose, roune, pproximtely 90 % of totl shell height; nterior terminl proue, tip lunt; posterior terminl slightly so. Dorsum evenly roune, not muh elevte, ompletely overe with orse, lose-set ris. Ventrum onvex, with terminl ollrs stright. Aperture nrrow, urve espeilly towrs the Tle 2. Dimensions of Trivellon enrioshwei spe. nov. Length refers to the gretest nterior/posterior mesurement. With refers to the gretest lterl (left-right) mesurement with the shell t rest on the ventrum. Height refers to the mximum gloosity from the ventrum through to the orsl extremity. Columellr respetively lrl entiles t the nterior n posterior en of the prietl respetively lrl lip hve een ounte s full teeth. The ount of the orsl ris follows the efinition y Shiler (1933: p. 288, text-fig.). Speimens (tlogue numers) ZSM ZMA ZMA ZMA DFB DFB DFB DFB DFB DFB 90-1 DFB 90-2 DFB 90-3 DFB 90-4 JGS T Length With Height CT LT RR H P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13

7 Figs Trivellon enrioshwei spe. nov. 9. Holotype, ZSM, oll. No Prtype 8, DFB, oll. No. 90-1, slightly suult. 11. Prtype 11, DFB, oll. No Prtype 12, DFB, oll. No , right lterl view;, orsl view;, left lterl view;, ventrl view. 7

8 nls. Lrum nrrow, stright t its mi-portion, urve nteriorly n posteriorly, rounly keele on ventrum, ering on its inner mrgin entiles. Outer lrl mrgin slightly rounly lluse. Siphonl n nl nls following shell profile; orere pilly n pilly y wek ventrl sie wlls. Columell nrrow, stright, tpering steeply inwrs, without rinl rige. Prietl lip rounly lluse, slightly projete, ering ris, whih eome finer onto the olumell. Fossul short, onve, not lerly elimite from the rest of the olumell. Inner fossulr ege slightly protruing. Shell olour overll white. No informtion ville on soft prts n rul. Vrition. The length vries etween 5.6 n 7.7 mm (see Tle 2). The posterior terminl is more or less proue. The terminl ollrs n e slightly reurve. The numer of orsl ris vries etween n, of lrl entiles etween n 21, of prietl ris etween 14 n, n of terminl ris tht over the spire etween 2 n 3. Etymology. The nme of the speies honours Mr. Enrio Shwe from ZSM. Distriution. From Chilwei Isln, E Chin Se (type lolity) in the north to the Sulu Se, Philippines n Jv Se in the south in epths etween 100 n 0 m on grvel n sn (Fig. 8). Disussion Trivellon enrioshwei spe. nov. is similr to its ongeners T. shepmni n T. olini Fehse & Grego, 04. The new speies iffers from T. shepmni y the ovte shell outline with the osure spire. The perture is nrrower in T. enrioshwei. The posterior lrl portion is not projete s in T. shepmni. Also the shell is more inflte in the ltter. The nterior lrl portion is elivous in T. shepmni n its orsum is higher elevte. Trivellon olini hs gloose shell with proue terminls n spire. The lrum is roer in T. olini espeilly in its mi-portion n is istintly elivous t the nterior portion. The lrl entiles re orser in T. enrioshwei n less numerous (-19 vs. - in T. olini). There is orsl epression in T. olini where the ris re osionlly isete n/or slightly kno-like thikene (Fehse & Grego 04: 41, pl. 23, fig. 95). Suh epression is not oservle in T. enrioshwei. 8 Aknowlegement We thnk Mrty Bels from Inglewoo, Cliforni, U.S.A. very muh for the lon of his Trivellon speimens. Referenes Bels, M. N. 01. A new speies of Roertotrivi from the Philippines. L Conhigli 33 (298): -. Cte, C. N A review of the Triviie (Mollus: Gstropo). Sn Diego Soiety of Nturl History Memoir 10: 1-1. Dutzenerg, P. 89. Contriution à l fune mlologique es Îles Açores. Résultts es rgges effetués pr le yht l Hironelle pennt s mpgne sientifique e 87. Révision es mollusques mrins es Açores. 112 pp., Resultts es Cmpgnes Sientifiques omplies sur son yht pr Alert 1er, Prine Souverin e Mono, fs. 1. Dolin, L. 01. Les Triviie (Mollus: Cenogstropo) e l Ino-Pifique: révision es genres Trivi, Dolihupis et Trivellon. In: Bouhet, P. & Mrshll, B. A. (es). Tropil eep-se enthos, vol.. Mémoires u Muséum Ntionl Histoire Nturelle 5: Fehse, D. & Grego, J. 04. Contriutions to the knowlege of the Triviie (Mollus: Gstropo). IX. Revision of the genus Trivellon Irele, pp., Berlin n Bnsk Bystri (privtely pulishe CD). & 07. Contriutions to the knowlege of Triviie (Mollus: Gstropo). XVIII. New speies of the genus Trivellon (Mollus: Gstropo) from the Mioene of Austrli. Reors of the Western Austrlin Museum 24 (2): & 09. Revision of the genus Trivellon Irele, (Mollus: Gstropo: Triviie). Allie Cowries. Contriution to the knowlege of Triviie. 0 pp., Ngykovási, Hungry (Grfon). Roerts, S. R New Cypreie. The Nutilus (9): Shepmn, M. M The Prosornhi, Pulmont, n Opisthornhi Tetirnhit, trie Bullomorph of the Siog Expeition. Tenigloss n Ptenogloss. Pp in: Uitkomsten op zoologish, otnish, oenogrphish en geologish geie verzmel in Neerlnsh Oost-Inie , vol. 49 (2). Leyen (E. J. Brill). Shiler, F. A Beiträge zur Kenntnis er Cypree (Moll. Gstr.) VII. 19. Ds Genus Trivirostr Jousseume.. Cypree von Neu-Pommern. Zoologisher Anzeiger, Leipzig, 102 (11/12): Verwntshft un Verreitung er Cypree. Arhiv für Molluskenkune 73 (2/3): 571.