A hinge line is an imaginary longitudinal line along the dorsal edge of the shell of a bivalve mollusk where the two valves hinge or articulate. The hinge line can easily be perceived in these images of a mussel shell and an ark shell.[1][2][3]
The hinge teeth, structures which control the articulation of the valves, are often but not always situated along the hinge line.
References[edit]
- ^ "Bivalvia Morphology". Archived from the original on 2020-01-29.
- ^ J.H. Leal. "Bivalves" (PDF). www.shellmuseum.org. Archived from the original (PDF) on 2013-05-11. Retrieved 2012-11-13.
- ^ Carter, Burt. "Invertebrate Paleobiology on-line syllabus on Bivalves". Georgia Southwestern State University. Archived from the original on 2020-02-25.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction