Winged-male
Guides
Arenivaga hopkinsorum
desert cockroach, sand cockroach
Arenivaga hopkinsorum is a species of desert cockroach in the family Corydiidae, described by Heidi Hopkins in 2014 as part of a major revision of the genus Arenivaga. Like other Arenivaga species, it exhibits dramatic sexual dimorphism, with females appearing wingless and males possessing fully developed wings. The species inhabits arid environments in the southwestern United States and Mexico, where it contributes to decomposition despite limited plant matter. The specific epithet honors the Hopkins family, particularly referencing the author's father and brother.
Arenivaga investigata
desert cockroach
Arenivaga investigata, the desert cockroach, is a species in the family Corydiidae endemic to the Colorado Desert of California. It is notable for its ability to absorb water vapor from unsaturated air above 82.5% relative humidity, a physiological adaptation that allows survival in one of the most arid environments on Earth. The species exhibits extreme sexual dimorphism, with wingless females and fully winged males. It inhabits sand dunes and is primarily found in subsurface microhabitats where temperature and moisture conditions remain favorable.
Dactylopiidae
Cochineal Insects
Dactylopiidae is a family of scale insects (Hemiptera) comprising the single genus Dactylopius, commonly known as cochineal insects. These insects are economically and historically significant as the primary source of carmine, a vibrant red dye derived from carminic acid that the insects produce as a defensive compound. The family has been used for dye production since at least the 10th century in the Americas and became the second most valuable export from the New World during the Colonial Period. Some species serve as biological control agents for invasive cacti, while others are agricultural pests of cactus crops.
Dipara trilineata
Dipara trilineata is a parasitoid wasp in family Diparidae endemic to eastern North America. Females are flightless (apterous) while males possess wings, creating pronounced sexual dimorphism. Despite this apparent dispersal limitation, populations across southern Appalachia show minimal genetic structure. The species was described from Trimicrops trilineatus in 1977, and its male had been misattributed until DNA barcoding definitively established the correct association.
Sphaeropthalma pensylvanica
velvet ant
Sphaeropthalma pensylvanica is a velvet ant (family Mutillidae), a group of solitary wasps known for their striking aposematic coloration and painful sting. The species exhibits notable sexual dimorphism: females are wingless and resemble ants, while males possess wings. It has been documented as a parasitoid of mud dauber wasps, particularly developing within cocoons of the organ pipe mud dauber (Trypoxylon politum). Research has revealed unusual reproductive characteristics including facultative size-dependent sex allocation, where larger females produce proportionally more female offspring. The species is also notable for phoretic copulation, a mating behavior in which the male transports the female by flight or foot from the initial contact site before mating occurs.