FISHERIES 81, OCEAN'.3 CANADA PECHES ET OCEANS CANADA LIBRARY I BIBLIOTHEQUE 21)0 KENT, STATION Kl A 0E6 ISSN

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1 ISSN CANADIAN TRANSLATION OF FISHERIES AND AQUATIC SCIENCES No FISHERIES 81, OCEAN'.3 CANADA PECHES ET OCEANS CANADA LIBRARY I BIBLIOTHEQUE 21)0 KENT, STATION 7244 Rhyacodrilus tauricus sp. n. (Oligochaeta, tubifiliegguartenthe moàntainous region of the crimea 9 Kl A 0E6 by E.B. Dembitsky Original Title: Rhyacodrilus tauricus sp. n. (Oligochaeta, tubificidae) iz gornogo kryma From: Zool. Zh. 55: , Translated by the Translation Bureau (NDE) Multilingual Services Division Department of the Secretary of State of Canada Department of Fisheries and Oceans Institute of Ocean Sciences Sidney, BC pages typescript

2 1. ; DEPARTMENT OF THE SECRETARY OF STATE TRANSLATION BUREAU erfe s SECRÉTARIAT D'ÉTAT BUREAU DES TRADUCTIONS MULTILINGUAL SERVICES DIVISION CANADA DIVISION DES SERVICES MULTILINGUES TRANSLATED FROM - TRADUCTION DE Russian INTO - EN English AUTHOR - AUTEUR E.B. Dembitsky TITLE IN ENGLISH - TITRE ANGLAIS Rhyacodrilus tauricus sp. n. (Oligochaeta, Tubificidae) from the mountainous region of the Crimea TITLE IN FOREIGN LANGUAGE (TRANSLITERATE FOREIGN CHARACTERS) TITRE EN LANGUE ÉTRANGÉRE (TRANSCRIRE EN CARACTÉRES ROMAINS) Rhyacodrilus tauricus sp. n. (Oligochaeta, Tubificidae) iz Gornogo Kryma REFERENCE IN FOREIGN LANGUAGE (NAME OF BOOK OR PUBLICATION) IN FULL. TRANSLITERATE, FOREIGN CHARACTERS. RÉFÉRENCE EN LANGUE ÉTRANGÉRE (NOM DU LIVRE OU PUBLICATION), AU COMPLET, TRANSCRIRE EN CARACTÉRES ROMAINS. Zoologicheskiy zhurnal REFERENCE IN ENGLISH - RÉFÉRENCE EN ANGLAIS Zoological Journal PUBLISHER - ÉDITEUR PLACE OF PUBLICATION LIEU DE PUBLICATION not available YEAR ANNÉE USSR 1976 DATE OF PUBLICATION DATE DE PUBLICATION VOLUME ISSUE NO. HUME RD PAGE NUMBERS IN ORIGINAL NUMÉROS DES PAGES DANS L'ORI GINAL NUMBER OF TYPED PAGES NOMBRE DE PAGES DACTYLOGRAPHIÉES 7 REQUESTING DEPARTMENT MINISTÈRE-CLIENT D F O TRANSLATION BUREAU NO NOTRE DOSSIER NC) BRANCH OR DIVISION DIRECTION OU DIVISION S. T -P B. TRANSLATOR (INITIALS) TRADUCTEUR (INITIALES) N. De. PERSON REQUESTING DEMANDÉ PAR YOUR NUMBER VOTRE DOSSIER NC) DATE OF REQUEST DATE DE LA DEMANDE Dr. R. Brinkhurst II January 28, 1982 UNEDITED TRANSLATION For information only TRADUCTION NON REVISEE Information seulement SOS (REV. 2/68) ne FEV

3 1 msecretary Secrétariat ^ of State d'état MULTILINGUAL SERVICES DIVISION DIVISION DES SERVICES MULTILINGUES Client's No. - No du client Department - Ministère Division/Branch - Division /Direction City - Ville D F 0 S.I.P.B. Sidney, B.C. Bureau No. - NO du bureau Language - Langue Translator ( Initials) - Traducteur ( initiales) Russian N. De. no Zoologicheskiy zhurnal ( Zoological Journal), 1976, vol. 55, No. 11, pp by E.B. Dembitsky UDC Rhyacodrilus sp. n. (477.75) Rhyacodrilus tauricus sp. n. (Oligochaeta, Tubificidae) from the mountainous region of the Crimea (Department of Zoology of the Kharkov Zooveterinary Institute) The fauna of aquatic oligochaetes ( Oligochaeta) of the Crimea has not been studied at all. The discovery in the Crimea of a specimen of the North American genus Mesoporodrilus has only been mentioned in the literature ( Lastochkin, 1937). In , the author of this paper collected material on oligochaetes in different areas of the Crimea. Among the specimens collected, we found a new species of tubificids from the genus Rhyacodrilus. It is described below. Rhyacodrilus tauricus Dembitsky sp. n. (see fig.) The prostomium is short and obtuse. The segments do not have secondary rings. Intersegmental furrow 2/3 is indistinct. There are 2-3 capillary setae up to 350 µ in length in each of the dorsal bundles up to segment XL.- Together with the capillary setae, the segments in the preclitellar region each bear 2-3 flabellate setae SEC 5-25 (2/78)

4 p in length, with thin outer teeth of equal length with lyre-shaped ends, the distal tooth slightly thinner than the proximal one and 5-7 intermediate denticles. The flabellate setae beyond the clitellum are of a different form; they are distally curved, with a shorter and thinner distal tooth. The setae in the dorsal-bundles of the last 6-7 segments are forked, with a very long proximal tooth positioned at an obtuse angle to the short distal one. The ventral bundles of the preclitellar region contain up to 7 forked setae p in length, with a longer distal tooth. The bundles of segment X consist of one spermathecal seta p in length, with a very thin distal tooth almost 3 times as long as the proximal one. Segments IX and XII each bear 1-2 setae which are similar to the spermathecal ones in size and form. The locomotory setae of segment XI are replaced by monodont penial ones iu in length and distributed 5-6 to a bundle. The ventral bundles of the postclitellar region consist of up to 5 setae with teeth of approximately equal length; those in the posterior region each consist of 1-2 setae with a shorter and thinner distal tooth. The pharynx extends to dissepiment 3/4. Massive oesophageal glands are found in segments IV-VI. The chloragogen tissue of the intestine begins in segment VI. The blood is yellow. There are no hearts. The dorsal vessel beats in the region of the clitellum. The postseptale of the anterior nephridium is found in segment XII. The body cavity éontàins a mass of granular coelomocytes p in diameter.

5 The clitellum occupies 1/3 of segment X to segment XII, and is weakly developed on the ventral side. The spermathecal pores are located on segment X in the line of ventral setae near intersegmental furrow 9/10. The male pores are found on segment XI in the line of ventral setae, in front of them. Female pores are not observed. Paired testes extend from dissepiment 9/10, and are located in segment X. Paired ovaries are found on the posterior wall of dissepiment 10/11. Paired sperm funnels (dorsoventral diameter 73 p) are found on the anterior wall of dissepiment 10/11. The vasa deferentia are short and not convoluted; they penetrate the posterior wall of the atrial ampulla where the atrial duct branches out (height of ampulla 94,p, width 77 p, thickness of muscular layer 4-5 p, thickness of epithelial layer 21 p, thickness of layer of prostatic cells 43 µ). We were unable to trace where the vasa deferentia open into the atrial cavity. The atrial duct is conical, extensible and functions like a penis (length 73 p, width of proximal part 40 p, thickness of walls up to 18 p, lumen approximately 6 p). Paired spermathecae are located in segment X; they do not connect with the intestine. The ampulla is spherical (1$5 µ in diameter), the efferent duct is not clearly defined, i.e. the epithelium of the spermatheca in the region adjacent to the excretory aperture forms characteristic thickenings (up to 43 µ). The seminal vesicles are unpaired; the anterior one extends from dissepiment 9/10 and occupies segment IX, and the posterior one extends from dissepiment 10/11 and ends in segment XIX. The ovisac extends into segment XXI.

6 Differences between Rh. tauricus and Rh. punctatus Characteristics Rh. tauricus Rh. punctatus Annulation Glandular cells in epidermis - Distribution of capillary setae Ventral setae Spermathecal setae No. of penial setae Blood circulation Chloragogen tissue of intestine Spermathecae Atrial ampulla Pseudopenis Seminal vesicles Length of body Maximum thickness No. of segments Anterior segment without Segments II-VII secondary annulation biannulate Absent Up to segment XL Forked, without intermediate denticles Present 5-6 Annular eessels of segments VIII-IX not expanded From segment VI Ampulla spherical, efferent duct not pronounced Slightly elongated Present, thick-walled Unpaired anterior and posterior Up to 12 mm 0.36 mm Up to 80 Present Up to segment XXV Flabellate (specimens from Lake Okhrida Forked (specimens from Croatia) None 4-5 Annular vessels of segments VIII-IX slightly wider than others From segment VIII Ampulla spherical, efferent duct clearly delineated from ampulla Spherical Absent Only posterior Up to 30 mm 0.84 mm Up to 112

7 -5- Dimensions (fixed in Bouin solution): length of body mm, diameter in the region of the clitellum p, number of segments Size of holotype: length of body 11 mm, diameter in the region of the clitellum 280 la, number of segments 71. Material: Crimea, eastern Ulu-Uzent R., clay shales, 21 July 1972, 1 specimen; same location, siltedlimestone with plant detritus, 22 July 1972, 2 specimens (1 mature); Sotera R., silted_limestone, 13 August 1973, 6 specimens; Derekoi R., silted pebble, 4 August 1973, 1 specimen; Khustabash R., shale with sand, 1 August 1973, 11 specimens (2 mature, including holotype). Holotype (series of sections) is stored at the Zoological Museum of Moscow University, Inv. No Rhyacodrilus tauricus sp. n. is distinguished from all the known species of the genus by the presence of spermathecal setae and the penetration of the posterior wall of the atria by the vasa deferentia. It resembles the Balkan Rhyacodrilus punctatus Hrabé, 1931 in the shape of the dorsal flabellate setae of the preclitellar region (Hrabé, 1931, 1973). The differences of these species are given in the table. The author expresses his sincere gratitude to N.L. Sokolskaya for examining the specimens and manuscript, and contributing her comments.

8 - 3 7 Rhyacodrilus tauricus sp. n. 1 - dorsal seta of segment VII; 2 - dorsal seta of segment XVI; 3 - dorsal seta of segment LXX; 4 - ventral seta of segment VII; 5 - ventral seta of segment XVI; 6 - spermathecal seta; 7 - penial seta (x1350); 8 - sagittal section in the region of the spermatheca; 9 - the same in the region of the atrium (x600) (pen - pseudopenis, v.d - vas deferens, pr - prostatic cells, m - muscular layer of atrium, ep - epithelial layer lining the cavity of the atrium) References 1. Lastochkin D.A., New species of Oligochaeta limicela in the fauna of the European part of the USSR. Doklady AN SSSR, 17, 4, pp Hrabe S., Oligochaeta from lakes Okhrida and Prespa. Zool. Jahrb., Abt. Syst., 61, 1-62; R. As, lioaiee Blum Oligoenzeta limiccia (;)ayne EsponeficKoil %merit - CCC P, CCCP, 17, 4: IIrab:": S., Die Oligochaeten aus - den Seen Ozfirida und Prespa, Zoo!. Jahrb., Abt. ' Syst., 61; On a collection o; Oligochaeta from various parts of Yugoslavia, Bio1oki vestnik, 21, 1:

9 RNYACODRILUS TAURICUS SP. N. (OLIGOCHAEïA, TUBIFIC;DAE) FROM THE r1i0l:ntai\ CRI.titEA E. B. Dc ti:31ts:^y Deparfrneni of Zoofoôy, Zoo_--`erir.ary Ir.stf:afe 01 FZftarkov Sum,lary A,Ityr,codrifus taurfctts Demtlitsl:y sp, n. :s drscribed i-fllc Kfiu_tabash river (t%1a un',.-iin Crimca). It is characterized by the prescace o; sper:iatllecal bristles, Eonoducts i,l!ing out in the posterior wall of atrisl zr ^u;la, slidi-., vl _eudopen^s. It rrscmljles t/teli_!l^:'tn S(l'Ci:a f^. f:etr?_ ica:i IlrOl)C, l^rii _..._ ijr^!? z.e I-OrS2a SJiI^^'?tv `)rlstl-cs to Citiilll;il. ^ ^