SHAPING SUCKERS' MOUTHS

Do cells have mouths?

n page 703, Kelso et al. complete the trilogy of actin papers with a detailed biochemical analysis of the Drosophila Kelch protein. Like the Arp2/3 complex, Kelch is required for proper actin organization in ovarian ring canals. Although the structure of Kelch suggested that it might act as a dimeric actin cross-linking protein, this activity had not yet been demonstrated. In an impressive seri...

Morphometric and Meristic Differences among Bluehead Suckers, Flannelmouth Suckers, White Suckers, and Their Hybrids: Tools for the Management of Native Species in the Upper Colorado River Basin

—Hybridization with nonnative fishes is a major factor influencing the status of native catostomids in the Colorado River basin. In Wyoming, hybridization with nonnative white suckers Catostomus commersonii is a particular concern in the conservation of native bluehead suckers C. discobolus and flannelmouth suckers C. latipinnis. The purpose of this study was to describe the meristic and morpho...

"From the mouths of babes ...

Tyrannosaurus rex, along with its kin among the Tyrannosauridae, possesses a distinct body plan that includes a deep skull, peg-like teeth, and a robust jaw. In recent years, however, researchers have debated whether a different dinosaur, called Alioramus remotus, might also be a tyrannosaurid. Stephen Brusatte et al. used bones recently characterized from a small, long-snouted, multihorned car...

The Parent Roots of Aspen Root Suckers

Studies of the Populus tremuloides root system by Day (1944), Sandberg (1951) and Barnes (1959) have all shown lateral roots extending as much as 30 feet from tree base. These roots may branch extensively and sometimes exhibit an "undulating" growth habit. According to the above authors, suckers occur on the segments of these lateral roots which are closest to the soil surface. The objective of...

Out of the mouths of babes.