| molecular characterization of crustacean visual pigments and the evolution of pancrustacean opsins. | investigations of opsin evolution outside of vertebrate systems have long been focused on insect visual pigments, whereas other groups have received little attention. furthermore, few studies have explicitly investigated the selective influences across all the currently characterized arthropod opsins. in this study, we contribute to the knowledge of crustacean opsins by sequencing 1 opsin gene each from 6 previously uncharacterized crustacean species (euphausia superba, homarus gammarus, archaeo ... | 2007 | 17053049 |
| a new species of mysidobdella (hirudinida: piscicolidae) from mysids along the california coast. | mysidobdella californiensis n. sp. is described from the mysid holmesimysis sculpta from bodega bay on the central california coast and from holmesimysis costata var. from san pedro on the southern california coast. the internal anatomy of m. californiensis is similar to that of the only other species in the genus, mysidobdella borealis from the north atlantic ocean, except that m. californiensis lacks the medial, unpaired seminal receptacle present in m. borealis. externally, m. californiensis ... | 2012 | 22007942 |