HOME
ABOUT
BY MORPHOLOGY
GENERA
- A
- B
- C
- D
- E
- F
- G
- H
- I
- J
- K
- L
- M
- N
- O
- P
- Q
- R
- S
- T
- U
- V
- W
- X
- Y
- Z
SPECIES
- A
- B
- C
- D
- E
- F
- G
- H
- I
- J
- K
- L
- M
- N
- O
- P
- Q
- R
- S
- T
- U
- V
- W
- X
- Y
- Z
CITATIONS
- A
- B
- C
- D
- E
- F
- G
- H
- I
- J
- K
- L
- M
- N
- O
- P
- Q
- R
- S
- T
- U
- V
- W
- X
- Y
- Z
GLOSSARY
- A
- B
- C
- D
- E
- F
- G
- H
- I
- J
- K
- L
- M
- N
- O
- P
- Q
- R
- S
- T
- U
- V
- W
- X
- Y
- Z
HELP
- FAQ
- Copyright
- Contact Us

Longitudinal rib

Longitudinal canal

Lunate

The longitudinal rib is a solid silica structure that runs along the apical axis.

Image Credit: Carrie Graef

The longitudinal rib of Frustulia is a distinctive feature. In Frustulia, the raphe is located between two branches of the longitudinal rib.

Image Credit: Sarah Spaulding

Species in Playaensis possess a longitudinal rib on either side of the raphe.