Listen to the second podcast episode with leading moth observation contributor Rachit Singh, as a part of our interview series leading up to the National Moth Week on July 22

Featured Document

Browse Documents

3 documents found tagged sem [X]
  • Title
    SEM study of gemmules and spicules of Indian Trochospongilla latouchiana Annandale and Chinese T. latouchiana sinensis Annandale (Porifera: Demospongiae: Spongillina: Spongillidae)
    Type
    Journal Article
    Description
    Gemmules and spicules of Trochospongilla latouchiana Annandale, 1907 from India and its subspecies T. latouchiana sinensis Annandale, 1919 from China have not been studied under SEM so far, as only optical microscopic illustrations are available. These illustrations are now provided using material from the Smithsonian Institution, USA. T. latouchiana sinensis has already been treated as a synonym of T. latouchiana. SEM observations reveal identical morphology of gemmules and spicules and it seems that synonymising the subspecies with T. latouchiana is justified, however more material must be studied to understand the variability of characters in these species.
    Attribution
    Jakhalekar S.S., Ghate H.V. (2014). Journal of Threatened Taxa 9(6) pp. 6269-6277; doi:10.11609/JoTT.o4003.6269-77
  • Title
    A note on five freshwater sponges (Porifera: Spongillina: Spongillidae) from Pune, Maharashtra, India
    Type
    Journal Article
    Description
    We report the presence of five freshwater sponges in ephemeral and permanent fresh water bodies in and around Pune, Maharashtra, India. Field observations, descriptive notes, habitus photographs and SEM photographs of body spicules, gemmule spicules and gemmules of five species are provided. Eunapius carteri (Bowerbank, 1863), Radiospongilla cerebellata (Bowerbank, 1863) and Corvospongilla lapidosa (Annandale, 1908) are commonly occurring species, whereas Ephydatia meyeni (Carter, 1849) and Dosilia plumosa (Carter, 1849) are rarely found. This report fills a longstanding gap in observations of freshwater sponges near Pune, and it is heartening to note that species reported earlier are still found in these environs.
    Attribution
    Jakhalekar S.S., Ghate H.V. (2013). Journal of Threatened Taxa 9(5) pp. 4392-4403; doi:10.11609/JoTT.o3356.4392-403
  • Title
    Intertidal Foraminifera of Indian coast - a scanning electron photomicrograph-illustrated catalogue
    Type
    Journal Article
    Description
    Foraminifera (forams) are very useful in deducing diverse environmental parameters such as palaeoclimate, oil deposits, oceanography, pollution monitoring and palaeomonsoons. Forams are calcareous, shell-secreting protists and are likely to be adversely affected due to anthropogenic ocean acidification caused by CO2 emission. Considering their significance and status, we have surveyed the occurrence of intertidal forams along the Indian Coast and Amini atoll of Lakshdweep Islands. Scanning electron microscopic observations have been carried out and are presented here. The foram assemblage is distinct from the tropical sites surveyed elsewhere while some of the species are common, suggesting that the local oceanographic conditions are major determinants in distribution of foram species. A total of 151 species of Foraminifera belonging to 65 genera, 41 families and 7 suborders were recorded in the present study. Only 4 species were planktonic and the rest were benthic. Rotalina and Miliolina were found to be dominant suborders. This paper contains SEM images of 142 identified species and surface details of some of species. The observations will serve the needs of researchers working with forams, especially in identification and morphological analysis.
    Attribution
    Devi G.S., Rajashekhar K.P. (2009). Journal of Threatened Taxa 1(1) pp. 17-36; doi:10.11609/JoTT.o1977.17-36