Esponjas (Demospongiae, Halichondrida) da costa do Maranhão, Brasil
نویسندگان
چکیده
منابع مشابه
New species of Myrmekioderma (Demospongiae: Halichondrida: Heteroxyidae) from Brazil.
The genus Myrmekioderma comprises eight species widely distributed, two of which occur in the Western Atlantic. We describe here a new species of Myrmekioderma from Northeastern Brazil with a discussion on the taxonomy of the Brazilian species. Samples were collected by trawling in the continental shelf of Sergipe and Alagoas States. Myrmekioderma intrastrongyla sp. nov. has strongyles in the c...
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متن کاملTwo new species of Halichondrida (Demospongiae) and the first record of Phycopsis and Ciocalapata for Brazil.
Two new species of the genera Phycopsis and Ciocalapata are described from the shallow waters off the Brazilian coast. This is the first record of Phycopsis in South Atlantic, with Phycopsis styloxeata sp. nov. being the only species of the genus that presents three categories of spicules: two of styles and one of oxeas. Ciocalapata, here represented by Ciocalapata minuspiculifera sp. nov., dis...
متن کاملPhylogenetic analysis of the order Halichondrida (Porifera, Demospongiae), using 3b-hydroxysterols as chemical characters
To analyze and extract phylogenetic information from chemical characters, the 3b-hydroxysterol composition of 12 sponge species of various families of the Poriferan order Halichondrida (sensu lato), was determined. The current definition of the order is ambiguous, and its classification remains in a state of flux and hence, further chemical characters may aid in stabilizing it. Axinella corruga...
متن کاملOn a Problem of da Costa
The two main founders of paraconsistent logic, Stanis law Jaśkowski and Newton da Costa, built their systems on distinct grounds. Starting from different projects, they used different tools and ultimately designed quite different calculi to attend their needs. How successful were their enterprises? Here we discuss the problem of defining paraconsistent logics following the original instructions...
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ژورنال
عنوان ژورنال: Iheringia. Série Zoologia
سال: 2004
ISSN: 0073-4721
DOI: 10.1590/s0073-47212004000200006