| Among the diatoms, there was a greater loss of pennate than centric diatoms. |
| In the slender legs of arthropods, with insufficient space for bulky muscles or long lever arms, many of the muscles are pennate. |
| Tissue-level concentrations of hydrophilic and lipophilic extracts caused high levels of mortality in a sympatric pennate diatom. |
| Plants of this species are in most cases rather regularly and densly pennate. |
| Diatoms are photosynthetic protists, which are classified into centric and pennate diatoms, according to whether they have a radial or bilateral symmetry. |
| The adductor muscles of the shells of clams are parallel, but most of the leg muscles of arthropods are pennate. |
