• पिक्नोगोनिडा |
pycnogonida मीनिंग इन हिंदी
pycnogonida उदाहरण वाक्य
उदाहरण वाक्य
अधिक: आगे- Meinert specialised in comparative anatotomy and histology mainly of Malacostraca and Pycnogonida.
- This kind of intracellular digestion occurs in many unicellular protozoans, in Pycnogonida, in some molluscs, Cnidaria and Porifera.
- He later worked at the Natural History Museum, where he became assistant curator of Crustacea and Pycnogonida and Keeper of Zoology.
- Recent work places the Pycnogonida outside the Arachnomorpha as basal Euarthropoda, or inside Chelicerata ( based on the chelifore-chelicera putative homology ).
- These are related as shown below . ( Pycnogonida ( sea spiders ) may be excluded from the chelicerates, which are then identified as the group labelled " Euchelicerata " .)
- However, a subsequent study using Hox gene expression patterns consistent with a developmental homology between chelicerates and chelifores, with chelifores innervated from a deuterocerebrum that has been rotated forwards; thus, the protocerebral Great Appendage clade does not include the Pycnogonida.
- This is not found anywhere else among arthropods except in some fossil forms like " Anomalocaris ", indicating that the Pycnogonida may be a sister group to all other living arthropods, the latter having evolved from some ancestor that had lost the protocerebral appendages.
- Although there is considerable agreement about the relationships between most chelicerate sub-groups, the inclusion of the Pycnogonida in this taxon has recently been questioned ( see below ), and the exact position of scorpions is still controversial, though they were long considered the most primitive ( basal ) of the arachnids.