189-191: Proceeding of the Academy of Natural Sciences of Philadelphia

Proceedings of the Academy of Natural Sciences of Philadelphia 154/1:Comparative morphology of the mouthparts, chelipeds and foregut of two kalliapseudid apseudomorphans (Crustacea: Tanaidacea). David T. Drumm, pages 137–147.

The mouthparts of the malacostracan crustaceans are different because they eat different things. Their guts are almost identical because they have a common ancestor.


A new species of the diatom genus

Adlafia

(Bacillariophyceae) from the United States. Eduardo A. Morales and My Le, pages 149–154.

New species put in an evolutionary context.


The taxonomy of the diatom

Lacunicula sardiniensis

Lange-Bertalot, Cavacini, Tagliaventi et Alfinito and its relationship with the genus

Craticula

Grunow (Bacillariophyceae). Eduardo A. Morales and My Le, pages 155–161.

Evolution of diatoms. Diatoms make good soil, as well as commercial abrasives, including toothpaste.