Caudal mucous pit Caudal mucous pit The caudal mucous pit, or caudal mucous horn, is an anatomical structure on the tail end of the foot of various land snails and slugs, terrestrial pulmonate gastropod mollusks. The function of this pit is the resorption of mucus when the gastropod is moving (see also Muratov 1999). An incorrect and yet often-used term for this structure is the "caudal gland". This area also used to be referred to by the term "caudal pore". Families of snails and slug where a caudal mucous pit exists in every species included: Families/subfamilies where is caudal mucous pit exists only
Dixie chub Dixie chub The Dixie chub ("Semotilus thoreauianus") is a species of freshwater ray-finned fish from the carp and minnow family Cyprinidae. It is endemic to southeastern United States. The Dixie chub is similar in shape to the creek chub, ("Semotilus atromaculatus") although it is typically a more robust and shorter than the creek chub. It also has larger and fewer lateral line scales, the origin of the dorsal fin is to the rear of that of the pelvic fin whereas in "S. atromaculatus" it sits directly over the pelvic fin origin, and the spots on the dorsal fin and caudal