Miscellanea Zoologica Hungarica 11. 1997 (Budapest, 1997)

Hołyńska, M.: A new representative of Mesocyclops thermocyclopoides-circle (Copepoda: Cyclopoida) from India

M. leuckarti deccanensisL'mdberg, 1935* + (1<>) M. ogunnus Onabamiro, 1957 + (5,11) +

<6) M. cï.pehpeinestis (Hu, 1943) +

<6) + <M M. ruttneriKieïer, 1981 +

<6) + (W M. splendidushindbevg, 1943 + (S.I2) + (3J M. thermocyclopoiclesHurada, 1931 +(2) Legend: 1 = Dussart & Fernando (1986); 2 = Kiefer (1981); 3 = Dussart & Fernando (1985); 4 = Nisa et al. (1987); 5 = Dussart & Fernando (1988); 6 = the author's unpublished results on Daday collection - Budapest, Hungarian Natural History Museum; 7 = Vass & Zutshi (1983); 8 = Sharma & Pant (1985); 9 = Vass et al. (1988); 10 = Lindberg (1935); 11 = Dussart & Sarnita (1987); 12 = Lindberg (1943) In two vials of the Daday collection (Forró & Dussart 1985), labelled as "Mesocyclops leuckartr, I found a new Mesocyclops species belonging to the Thermocyclopoides-circle (Holynski & Fiers 1994). Material and methods Material examined: Type material - holotype: female (ex. vial no: III-265; India, Calcutta); paratypes: eleven females (ex vials no: III-263, 265; India, Calcutta), dissected in glycerin and mounted in two Cobb-slides each - the first contains A1-P4, the second P5-abdomen; non-type material - 194 undissected females (ex vial no: III-265). Male was not found. Both vials were deposited in "Collectio Dadayana", Department of Zoology, Hungarian Natural History Museum. Measurements were made on the twelve dissected specimens in glycerin. I made the drawings by means of Wild M 20 microscope fitted with drawing tube. In three paratype specimens the light microscope studies of the urosome were supplemented by scanning electron microscopic examinations. In the nearly hundred years old Mesocyclops material I could not find any specimen without injuries, therefore the characterization of armatures of the antennulae, mouth organs and legs, is a compilation based on all the dissected specimens. The holotype, seven paratypes and 174 undissccted non-type specimens are deposited in the Department of Zoology, Hungarian Natural History Museum, Budapest, four paratypes and 20 undissected females in the Museum and Institute of Zoology, Warsaw. I used the terminology of the furcal setae and female genital system according to Huys & Boxshall (1991). Abbreviation used in the text, and figures are: Al = antennula, P4 = leg 4, P5 = leg 5, enp = endopod, exp = exopod, s = seta, sp = spine, ae = aesthetasc. Results Mesocyclops dadayi sp. n. Type locality: India, Calcutta Etymology: The species is named after Jenő Daday Deés, renowned Hungarian student of microcrustacea, whose collection this species is described from.