STUDY OF A NEW TAPEWORM, PROBOTHRIOCEPHALUS KURARAENSIS, N.SP. FROM MASTACEMBELUS ARMATUS, FROM BLOCK KURARA DISTRICT HAMIRPUR (U.P.) INDIA

Eight fishes, Mastacembelus armatus were examined from block Kurara, district Hamirpur (U.P.) India . Two alike cestodes were reported in its intestine. Scolex well developed with two sac like bothria. Apical disc armed with bothrial spines. Ovary bilobed, dumbell shaped with long isthmus.

STUDY OF A NEW TAPEWORM, APICOBOTHRIUM BHARUAENSIS N.G.,N.SP. FROM, MASTACEMBELUS ARMATUS FROM BLOCK BHARUA DISTRICT HAMIRPUR (U.P.) INDIA

Eight fishes, Mastacembelus armatus were purchased from block Bharua, district Hamirpur (U.P.) India . Two alike cestodes were reported in its intestine. Scolex elongated with two elongated spined bothria. Apical disc armed with bothrial spines. Ovary bilobed, medial and post equatorial.

A supplementary description of Brisaster iheringi (Spatangoida: Schizasteridae) from the Miocene of Patagonia Argentina

Neogene Argentinean echinoids are important biostratigraphic tools. New specimens of Schizaster iheringi (de Loriol, 1902) from Early Miocene sedimentites (Chenque Formation, Patagonia, Argentina) allowed us to improve its original description, providing for the first time details of the apical disc and the oral side of test. The species is included into the genus Brisaster: the first unquestionable documented reference to the taxon from the Neogene of Argentina. All previously reported specimens of this species are evaluated, concluding that the stratigraphic range of the genus Brisaster in Patagonia must be restricted to the Early Miocene. Rev. Biol. Trop. 65(Suppl. 1): S137-S146. Epub 2017 November 01.

DESCRIPTION OF FOUR NEW SPECIES OF SENGA (PLATYHELMINTHES: CESTOIDEA) FROM FRESHWATER FISHES OF INDIA

The genus Senga6 contains 47 valid species. Four new species of Senga6, reported from India.Senga kakdwipensis sp.nov. collected from the intestine of a freshwater fish, Mastacembelus armatus from Kakdwip, South 24-Parganas, West Bengal; Senga bengalensis sp.nov. collected from the freshwater fish, Mastacembelus armatus from Hasnabad, North 24-Parganas, West Bengal; Senga orissaensis sp.nov. collected from the intestine of a freshwater fish, Channa punctatus from Puri district of Orissa and Senga nagalandensis sp.nov. collected from the intestine of a freshwater fish Colisa fasciata from Mokokchung district of Nagaland. Senga kakdwipensis sp.nov. characterized by a triangular scolex, 0.115-0.56 in length and 0.275-0.08 in breadth ; absence of neck; rostellar hooks arranged in a single circle, 46-56 in number and testes 45-48 in number. Senga bengalensis sp.nov. characterized by a triangular scolex, 0.23-0.445 in length and 0.085-0.27 in breadth; a pair of fleshy bothria present; rostellar hooks 48-50 in number of two different sizes arranged in two semicircles; presence of neck; testes 50-60 in number.Senga orissaensis sp.nov. characterized by a pear-shaped scolex that measures 0.1 in length and 0.2 in breadth; rostellar hooks 54 in number arranged in two semicircles; presence of short apical disc; short neck present; testes 39-40 in number. Senga nagalandensis sp.nov. characterized by an ovoid scolex with a pair of fleshy half-moon-shaped bothria, measures 0.45 x 0.35; apical disc present and is provided with 46 unequal rostellar hooks arranged in a single circle; neck absent; testes are 60-70 in number. The presence of these new morphological characters differentiates the three observed new species from the rest of the described species in the genus.

Echinoids from the Chlamys Ledge Member (Polonez Cove Formation, Oligocene) of King George Island, West Antarctica

New echinoid material from the Oligocene Chlamys Ledge Member (uppermost part of the Polonez Cove Formation) on King George Island, West Antarctica, includes the “regular” echinoid Caenopedina aleksandrabitnerae sp. n. and poorly preserved spatan-goids, here tentatively identified as members of the genus Abatus. Caenopedina aleksan-drabitnerae sp. n. is characterized by fully tuberculate genital plates, which sets it apart from most other species in the genus, by the uneven periproctal margin which indicates that periproctal plates were incorporated into the apical disc, and by moderately wide inter-ambulacral plates with a height/width ratio of 1:3. Among the modern Caenopedina species it is closest to the Australian and New Zealand representatives, which is in contrast to previ-ous reviews of Cenozoic Antarctic echinoid faunas that suggested limited relationship to the Australasian region. This is the first record of Caenopedina from Antarctica; it considerably extends its historical distribution to the south.

Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia

From Albian, Santonian and Campanian strata in south-central Sakhalin, four echinoid taxa are described, illustrated and discussed. In Far East Russia, echinoids are rare constituents amongst mid- and Late Cretaceous macrofaunal assemblages in which inoceramid and non-inoceramid bivalves, plus heteromorph and non-heteromorph ammonites predominate. The sole regular species in the present lot is represented by an incomplete external mould of a primary spine of a rhabdocidarid, Polycidaris(?) sp., from the lower Campanian. Irregular taxa include a fragmentary, specifically indeterminate ‘pygurid’, Echinopygus(?) sp., of late Albian age, as well as two spatangoids. One of these, a toxasterid of late Campanian age, is assigned to Niponaster cf. hokkaidensis (Lambert in Lambert & Thiéry, 1924). The other is a new hemiasterid with a semi-ethmophract apical disc, a peripetalous fasciole with diffuse boundaries (parafasciole) and posterior petals that are near-equal in length to anterior ones, from lowermost Campanian strata. For this, the name Palhemiaster natalyae n. sp. is introduced. Comparisons with coeval echinoid faunas from nearby Hokkaido (northern Japan) are hampered by the generally poor preservation of the latter. However, with the exception of Niponaster cf. hokkaidensis, none of the forms recorded in the present paper appears to be represented in those Japanese assemblages.

SEM evidence for existence of an apical disc on the scolex of Clestobothrium crassiceps (Rudolphi, 1819): comparative results of various fixation techniques

The scolex of the bothriocephalidean cestode Clestobothrium crassiceps was studied by means of scanning electron microscopy (SEM). The comparative results of various fixation procedures and techniques are presented. The scolex of C. crassiceps is oval to globular and exhibits two deep bothria which appear in the form of two lobes separated by a longitudinal groove. At the apex of the scolex, resembling a beret, an apical disc is present (oval, flattened and with a sinuous edge). Our results are compared with those previously reported in other species of Clestobothrium. This study represents the first report which highlights the presence of an apical disc in the scolex of C. crassiceps. It describes the effects of different procedures applied to our material during preparation and a comparative analysis results obtained using these various methods.