In a sample taken from Apipucos Reservoir (Recife, PE, Brazil) for taxonomic study, a high percentage (40%) was found of cladoceran Ilyocryptus spinifer individuals with morphological abnormalities on their postabdomen. There was not a fixed pattern of the malformations, which varied in gravity, and could affect the postanal spines or terminal claws. The postabdominal abnormalities are describe...

We studied by SEM the external morphology of the ooecium in eight bryozoans of the genus Cauloramphus (Cheilostomata, Calloporidae): C. spinifer, C. variegatus, C. magnus, C. multiavicularia, C. tortilis, C. cryptoarmatus, C. niger, and C. multispinosus, and by sectioning and light microscopy the anatomy of the brooding apparatus of C. spinifer, C. cryptoarmatus, and C. niger. These species all...

The study was conducted in the Capibaribe river estuary in Recife (Brazil) to assess the role played by cladocerans in a eutrophic environment. Samplings were carried out monthly at 4 fixed stations along the estuary from July 1987 to June 1988. Collections were made with a plankton net of 65 micrometers mesh size. Six cladocerans species were registered: Penilia avirostris, Diaphanosoma spinul...

Lulilan obscurus gen. nov. spec. nov., spinifer and Phine succinea are described as new. L. the closest relatives of furcatus (Hardwicke, 1823). The elongated abdominal segments 7–8 long dististyli in males synapomorphies three species, while a processus (sternal spur) at male’s 2nd sternum is indicative sistergroup relationship between . - wings devoid any markings. Abdominal 7 8 distally enla...

In this investigation, the genotoxic and oxidative effects of water soluble extracts of Heterometrus spinifer (Malaysian Forest Scorpion) has been assessed on cultured human blood cells. The extract was added to the cultures at 12 different concentrations (0-2000 mg/L). Micronucleus (MN) test was used to monitor the DNA and chromosomal damage produced by scorpion extracts in vitro. In addition,...

The river sardine, Mesobola brevianalis (Boulenger, 1908), is the type species of Mesobola Howes, 1984. Standard phylogenetic analyses of partial sequences of the cytochrome oxidase I gene of individuals from populations across southern Africa that are currently identified as Mesobola brevianalis showed that these populations represent four genetically distinct allopatric lineages. Furthermore,...