Cestode parasites of fishes of Madras coast

Subhapradhaa, C K (1957) Cestode parasites of fishes of Madras coast. Indian Journal of Helminthology, 7 (2). pp. 41-132.

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    Abstract

    Forty-five cestode species, of which 20 are new, are succinctly described and figured from the spiral valve of marine fishes caught off the coast of Madras. Anteropora indica n. g., n. sp. a monozootic cestode 1-12 mm. in length, from the spiral valve of Narcine timlei is placed in a new family Monoporophyaeidae which, with Biporophyllaeidae, forms a new order Anteroporidea, replacing Subramaniam's Biporophyllidea, 1939 which is considered an unsuitable nsme as Anteropora has only one common uterine and genital pore. Eulacistorhynchus chiloscyllius n. g., n. sp. from Chiloscyllium griseum is placed in a new subfamily Eulscistorhyn-chinae of Lacistorhynchidae Guiart. Although it is close to Lacistorhynchinae it has a double chainette and the various parts of the scolex differ in relative length. Otobothrium minutum n. sp. from Carcharias walbeehmi andC. limbatus measures only 2-5 mm. in length whereas O. penetrans is 130 to 160 mm. and O. insigne 10 mm. As in O. penetrans there is no collar, the ciliated pits are very small and the genital pore lies below the middle of the lateral margin, but the testes do not extend below the cirrus pouch. In O. insigne a collar is present, the ciliated pits are large and the genital pore is above the middle of the lateral margin. Uncibilocularis indica n. sp. from Chiloscyllium griseum is 16 mm. in length. The two loculi of the bothria are small and occupy only the posterior third of the bothria. Each bothridium has an accessory sucker, there is a tubercle on the outer prong of the hooks, the genital apertures alternate irregularly in or a little above the middle of the lateral margin; the testes number 50 to 60. Acanthobothrium indicumn. sp. from Narcine braunii, A. southwelli n. sp. from Rhinobatus schlegelii, A. rhyncho-batidis n. sp. from Rhynchobatus djiddensis (divided into two subspecies named A. r. elongatum and A. r. rotundum) are also described and figured. The characters which differentiate these three new species from nine known species of Acanthobothrium are set out in tabular form. Pithophorus musculosusn. sp. from Carcharias acutus, C. limbatus, C. walbeehmi and Rhynchobatus djiddensis measures only up to 12 mm. in length. There are spines on the head, muscular pads bound the anterior opening, the genital pore is on the anterior third of the lateral margin and the cirrus is not spiny. In these respects it differs from P. tetraglobus and P. vulpeculae. Echenei-bothrium verticillatum n. sp. from Rhynchobatus djiddensis differs chiefly from E. oligotesticularis in having 12 to 14 instead of four to seven testes, and from E. flexile in having bothria which are pediceled and each divided into two halves. Echeneibothriumfilamentosum n. sp. from Rhinobatus granulatus and R. schkgelii measures only 0-7 to 1-417 mm. in length when fully mature. The genital organs are arranged as in E. flexile but the ovary is not divided into follicles. There are five testes, the irregularly alternating genital pores open in front of the middle of the lateral margin. The bothria are made up of two hinged halves and each half is divided into four loculi by transverse septa. Carpobothrium megaphallum n. sp. from Chiloscyllium griseum differs from Carpobothrium chiloscylii, the only other species of this genus, in the absence from the scolex of two distinct flaps while the testes, numbering about 58, lie in front of the cirrus pouch and the shell gland is behind the ovary. The cirrus pouch is U-shaped, large and armed with spines. Phyllobothrium typicum n. sp. from Carcharias acutus, C. walbeehmi and Mustelus manazo is 3-68 mm. in length, the testes number 50 to 60 and the cirrus is unarmed. In these respects it differs from P. prionads. Phyllobothrium chiloscyllii n. sp. from Chiloscyllium griseum, Rhyncho batus djiddensis, Rhinobatus granulatus and R. schkgelii has the genital pore anterior in position and measures only 12 mm. long, differing from P. foliatum, while in P. centrurum the genital pore is in the posterior half of the segment and the testes do not extend behind the cirrus pouch. Phyllobothrium minimum n. sp. from Rhynchobatus djiddensis is 2 mm. in length and consists of four or five segments. It differs from P. chiloscyllii in that the 39 to 57 testes are in two rows along the middle of the segment and the vitellaria do not extend behind the ovary. Anthobothrium septatum n. sp. from Rhynchobatus djiddensis and Trygon imbricata is up to 3 mm. in length with four to six segments and is peculiar in having transverse septa, which number ten to 15, dividing the bothria. Anthobothrium crenulatum n. sp. from Rhinobatus helavi strikingly resembles A. septatum but the bothria lack distinct septa and the segments number 15 to 16, while'there are only 16 to 21 testes. It differs from A. oligorchidum in the absence of neck and in the number of testes. Anthobothrium spinosum n. sp. from Carcharias acutus, C. walbeehmi and G. limbatus is up to 4 mm. in length and differs from all other species of the genus in the presence of minute spines on the minute scolex. These spines also extend over the neck and anterior part of the strobila. Cephalobothrium rhinobatidis n. sp. from Rhinobatus granulatus measures up to 64 mm. in length. As there are only five oval testes in all the segments it is considered distinct from C. abruptum and C. variabile while its length differentiates it from C, aetobatidis which is only 10 mm. long. A table compares the characters of Tylocephalum elongatum n. sp. and T. minimum n. sp. from Rhynchobatus djiddensis with those of T. dierama. T. elongatum is 95 mm. long, a neck is absent and there is a long spiny cirrus. T. minimum is only i mm. to 2 mm. long and the 33 oval testes lie along the median longitudinal axis. In both of the new species the genital pore is distinctly anterior, it is below or in the middle of the segment and the vitellaria extend below the ovary. R. T. L.

    Item Type: Article
    Uncontrolled Keywords: Cestode parasites; fishes; Madras coast
    Subjects: Invertebrata
    Divisions: CMFRI-Mandapam
    Depositing User: Arun Surendran
    Date Deposited: 24 Dec 2019 09:10
    Last Modified: 24 Dec 2019 09:10
    URI: http://eprints.cmfri.org.in/id/eprint/13986

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