Grillotia dollfusi sp. n. (Cestoda: Trypanorhyncha) from the Skate ...

Grillotia dollfusi sp. n. (Cestoda: Trypanorhyncha) from the Skate ...

Grillotia dollfusi sp. n. (Cestoda: Trypanorhyncha) from the Skate, Raja chilensis, from Chile,and a Note on G. heptanchiAuthor(s): Juan Carvajal G.Source: The Journal of Parasitology, Vol. 57, No. 6 (Dec., 1971), pp. 1269-1271Published by: The American Society of ParasitologistsStable URL: 26/02/2010 15:54Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at JSTOR's Terms and Conditions of Use provides, in part, that unlessyou have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and youmay use content in the JSTOR archive only for your personal, non-commercial use.Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printedpage of such transmission.JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range ofcontent in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new formsof scholarship. For more information about JSTOR, please contact American Society of Parasitologists is collaborating with JSTOR to digitize, preserve and extend access toThe Journal of Parasitology.

THE JOURNAL OF PARASITOLOGYVol. 57, No. 6, December 1971, p. 1269-1271GRILLOTIA DOLLFUSI SP. N. (CESTODA: TRYPANORHYNCHA)FROM THE SKATE, RAJA CHILENSIS, FROM CHILE, AND ANOTE ON G. HEPTANCHIJuan Carvajal G.Laboratorio de Zoologia, Instituto de Ciencias Biologicas, Universidad Catolica de Chile,Casilla 1 14-D, Santiago, ChileABSTRACT: Grillotia dollfusi sp. n., characterized by number and size of proboscide hooks, absence ofspecial hooks in the basal armature, and scolex formula, is described from Raja chilensis Guichenot,1848. The range for G. heptanchi (Vaullegeard, 1899) is extended to the southeastern Pacific Ocean offthe coast of Chile.Representatives of the genus Grillotia havebeen previously reported from the AtlanticOcean, Mediterranean Sea, Pacific Ocean, andIndian Ocean. This is the first report of adultGrillotia spp. from the southeastern PacificOcean.MATERIALS AND METHODSOne hundred thirteen skates, Raja chilensis, and5 sixgill sharks, Hexanchus griseus, were collectedfrom November 1966 to March 1971. The hostswere obtained and the parasites examined bymethods previously described (Carvajal and Goldstein,1969). Proglottids embedded in gelatin weresectioned at 15 ,u with a freezing microtome andstained. Unstained proboscides were removed attheir bases from parasites fixed in 70% ethanol,hydrated, placed in lactophenol, and mounted inHoyer's medium. Measurements are in micronsunless otherwise indicated.DescriptionGrillotia dolifusi sp. n.(Figs. 1-5)Long, acraspedote, euapolytic worms. Length,9 cm; maximal width, 4 mm. Bothridia 2, of thereverse cordiform type; as broad as they are long;900 to 1,100 wide; 900 to 1,100 long. Scolexformula approximately 1:2:1; pars bothridialis,1,000 to 1,200,; pars vaginalis, 2,000 to 2,800; parsbulbosa, 1,400 to 1,600; evaginated proboscides,1,500 to 2,000 long. Proboscis armature poeciloacanthous,with hooks of different kinds (Figs. 1-4). Following the hook nomenclatural system ofDollfus (1942), each half turn has 4 hooks; hooks1(1') on inner side are largest; length of base ofimplantation, 42.5 to 47.5; greatest dimension, 55.2to 57.5; from tip to end of posterior heel, 20 to 25.Hooks 2(2') base of implantation without welldevelopedheel; 22.5 to 27.5; greatest dimension,45 to 47.5. Hooks 3(3') base of implantationmoderate in size; 25 to 30 in length. On the middleof the external face is a longitudinal band ofReceived for publication 3 December 1970.1269small hooks extending from the tip of the proboscisto the base. Between the transverse rows ofprincipal hooks are interpolating groups of smallerhooks, 10 to 13 in number, disposed in 2 rows andconfluent with the longitudinal band of small hookson the middle of the external face. There is nobasal armature of specialized hooks. Retractormuscle of the proboscis inserted at posterior partof the bulbus. Testes numerous, more than 300, inmedullar field throughout entire length of proglottid(Fig. 5); diameter of testes approximately 100.Cirrus pouch muscular, pear-shaped, its long axistransverse to the length of the proglottid and extendingto its midline. Ovary medium-sized inposterior part of proglottid; separated from posteriorborder of proglottid by the testes. Graviduterus reaches anterior border of proglottid. Uterineeggs ellipsoidal, without a polar projection; 62by 30. Number of segments, about 70. Dimensionsof last gravid segment (several worms) 1,300long by 600 wide; 2,400 long by 1,200 wide; thus,the terminal segment is twice as long as wide.Host: Raja chilensis Guichenot, 1848.Locality: South Pacific Ocean, between latitudes32?28' S and 37?15' S (between Papudo and Talcahuano,Chile).Holotype: Museo Nacional de Historia Natural,Chile, No. 20,004.Paratypes: USNM Helm. Coll. No. 72010.RemarksDetailed accounts of the species of the genusGrillotia Guiart, 1927, are those of Dollfus(1942, 1946, 1969a, b). Grillotia dollfusi sp. closely related to the species of the erinaceusgroup, whose hosts are skates of the genus Raja.These include G. erinaceus, G. pseudoerinaceus,G. recurvispinis, and G. musculara. G.dollfusi is readily separated from them by thelack of basal armature of specialized hooks, differentscolex formula, and smaller principalhooks. The distribution of its host lies in a differentgeographic area, from latitudes 23? S to52? S in the Pacific Ocean (De Buen, 1959).

1270 THE JOURNAL OF PARASITOLOGY, VOL. 57, NO. 6, DECEMBER 1971100 #_L1 10,t A2- 20 n01FIGURES 1, 2. Grillotia dollfusi sp. n., from Raja chilensis off Chile. 1. Basal portion of proboscisshowing part of the external face (it is viewed somewhat between external face and bothridial face).2. Basal portion of the proboscis showing the internal face.{*" sThe remaining species of Grillotia having fourt. .c~ ,pairs of principal hooks inhabit elasmobranchs-'| =^ "~^^^ i & other than species of the genus Raja, have spe-^k I^ ^^~\ ^^^cial basal armature, and a much reduced interpolatinggroup of hooks. The remaining. ...m.... ) -nt species of Grillotia differ from G. dollfusi', ^^ ^^^^^\ T mainly in having more than four pairs of prinf'lmmcipal hooks; their definitive hosts are sharks.V~~~~- ) n }M5vGrillotia < >heptanchi (Vaullegeard, 1899)4 Host: Hexanchus griseus (Bonaterre).Locality: Latitude 43044' S; longitude 73?28' W;depth, 146 m.Remarks,\ I |( l ^% l \ Of ^ five sixgill sharks examined, only one1t ! -/harbored a single specimen of G. heptanchi, aJ- I jworldwide species. Its hosts are mainly sharks'/ 1 lmm ,, ?of the family Hexanchidae. For detailed ac-\(- counts of hosts andI localities see~Dollfus (1942)./- ^ g G. heptanchi has also been reported in Atlantic3 uFIGURESF 3-5. Grillotia dollfusi cont'd. 3. Whole5 %!^Sj ( mount of scolex, mounted with pressure. 4. Scolexfrom a specimen fixed in formalin. 5. Frontal sectionof a mature proglottid.

CARVAJAL G.-GRILLOTIA DOLLFUSI SP. N. FROM THE SKATE, RAJA CHILENSIS 1271waters (Yamaguti, 1959) and recently in thethe Indian Ocean (Myint, 1968). Robinson(1959) reported it in the southwestern PacificOcean. This is the first report of G. heptanchifrom the southeastern Pacific Ocean. The distributionof Hexanchus griseus in the easternPacific Ocean is from British Columbia toSouthern California; coast of Chile; vicinity ofthe Hawaiian Islands (Kato et al., 1967). Thisrange agrees closely with the areas given forprevious records of G. heptanchi in the Northand the present report in the South.ACKNOWLEDGMENTSI would like to extend sincere appreciationto Dr. Robert J. Goldstein who critically reviewedthe manuscript and made useful suggestions,and to Empresa Pesquera Harling ofSan Antonio, Chile, who provided me withsailing facilities.LITERATURE CITEDCARVAJAL G., J., AND R. J. GOLDSTEIN. 1969.Acanthobothrium psammobati sp. n. (Cestoda:Tetraphyllidea: Onchobothriidae) from theskate, Psammobatis scobina (Chondrichthyes:Rajiidae) from Chile. Zool. Anz. 182: 432-435.DE BUEN, F. 1959. Lampreas, tiburones, rayas ypeces en la Estaci6n de Biologia Marina deMontemar, Chile. Rev. Biol. Mar. 9: 3-200.DOLLFUS, R. PH. 1942. etudes critiques sur lesTetrarhynques du Museum de Paris. Arch.Museum Nat. Hist. Nat. (Paris) 19: 1-466.1946. Notes diverses sur des Tetrarhynques.Mem. Museum Nat. Hist. Nat. Paris 22:179-220.1969a. Quelques especes de cestodesTetrarhynques de la c6te Atlantique des ltatsUnis,dont l'une n'etait pas connue a l'etatadulte. J. Fish. Res. Bd. Canada 26: 1037-1061.. 1969b. De quelques cestodes Tetrarhynques(Heteracanthes et Pecilacanthes)recoltes chez des poissons de la Mediterranee.Vie et Milieu, ser. A 20: 491-542.KATO, S., S. SPRINGER, AND M. H. WAGNER. 1967.Field Guide to Eastern Pacific and HawaiianSharks. U. S. Fish and Wildlife Serv. Circular271: 47 p.MYINT, K. 1968. Study of cestodes of somefishes. Union Burma J. Life Sci. 1: 36-42.ROBINSON, E. S. 1959. Records of cestodes frommarine fishes of New Zealand. Tr. Roy. Soc.N. Z. 86: 143-153.YAMAGUTI, S. 1959. Systema Helminthum. 2.The Cestodes of Vertebrates. IntersciencePublishers, Ltd., London, 860 p.ANNOUNCEMENT . . .SHORT COURSE IN HISTOCHEMISTRYThe seventh short course in Histochemistry forCollege and University Teachers of Zoology willbe offered by the Department of Biology, VanderbiltUniversity, Nashville, Tennessee from 11 Juneto 1 July 1972. Living and travel expenses for20 selected participants will be funded by a grantfrom the National Science Foundation. No tuitionor fees will be charged. To be eligible, applicantsmust be members of the faculty of an accreditedcollege or university and teach at least one coursein some area of zoology. In addition, they mustbe interested in histochemistry either in teachingand/or in research. Ten specialists in various areasof histo- and cytochemistry will lecture and conductdemonstrations. Deadline for receipt of application:15 March 1972. For application forms, pleasewrite:Dr. Burton J. BogitshBox 1733, Station BVanderbilt UniversityNashville, Tennessee 37203

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