Ceratophaga vicinella is a species of moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 belonging to the family Tineidae

Tineidae

Tineidae is a family of moths in the order Lepidoptera. Collectively, they are known as fungus moths or tineid moths. The family contains considerably more than 3,000 species in over 300 genera. Most of the tineid moths are small or medium-sized, with wings held roofwise over the body at rest...

. It has a restricted range in the southeastern United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, mainly in Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

 and Mississippi

Mississippi

Mississippi is a U.S. state located in the Southern United States. Jackson is the state capital and largest city. The name of the state derives from the Mississippi River, which flows along its western boundary, whose name comes from the Ojibwe word misi-ziibi...

.

This species appears to be in decline, almost certainly because the gopher tortoise Gopherus polyphemus

Gopherus polyphemus

The gopher tortoise is a species of the Gopherus genus native to the southeastern United States. The gopher tortoise is seen as a keystone species because it digs burrows that provide shelter for 360 other animal species...

is under threat: the moth relies on the tortoise in a unique way. All Ceratophaga

Ceratophaga

Ceratophaga is a genus of moths belonging to the family Tineidae. There are currently 16 described species. Most species are found in Africa with three found in Asia and one, C. vicinella, found in the southeastern United States....

larva

Larva

A larva is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle...

e feed, uniquely among Lepidoptera

Lepidoptera

Lepidoptera is a large order of insects that includes moths and butterflies . It is one of the most widespread and widely recognizable insect orders in the world, encompassing moths and the three superfamilies of butterflies, skipper butterflies, and moth-butterflies...

, on solid keratin

Keratin

Keratin refers to a family of fibrous structural proteins. Keratin is the key of structural material making up the outer layer of human skin. It is also the key structural component of hair and nails...

. Most species feed on the horns

Horn (anatomy)

A horn is a pointed projection of the skin on the head of various animals, consisting of a covering of horn surrounding a core of living bone. True horns are found mainly among the ruminant artiodactyls, in the families Antilocapridae and Bovidae...

 and hooves of dead ungulate

Ungulate

Ungulates are several groups of mammals, most of which use the tips of their toes, usually hoofed, to sustain their whole body weight while moving. They make up several orders of mammals, of which six to eight survive...

s but C. vicinella feeds exclusively on the shells of dead gopher tortoises.

The larva of C. vicinella, whitish with a dark brown head, constructs a silken tube strongly attached to the tortoise shell, which extends up to 10 cm into the ground, possibly to protect the larva from temperature extremes and parasitoid

Parasitoid

A parasitoid is an organism that spends a significant portion of its life history attached to or within a single host organism in a relationship that is in essence parasitic; unlike a true parasite, however, it ultimately sterilises or kills, and sometimes consumes, the host...

s. It feeds, and eventually pupa

Pupa

A pupa is the life stage of some insects undergoing transformation. The pupal stage is found only in holometabolous insects, those that undergo a complete metamorphosis, going through four life stages; embryo, larva, pupa and imago...

tes, within the protection of this tube. Often several tubes are found together on a single shell, forming a "crust".

The adult is a fairly typical tineid, blackish brown with a tiny white spot on each forewing and a prominent tuft of cream-coloured hair on the head.