Burmipachytrocta singularis Azar et al., 2015
thick barklouseKingdom: Animalia
Species: Burmipachytrocta singularis
Geological Time Scale
Sub Period: None
International Age: Albian (early)
Acquired by: Purchase/Trade
Characteristics of the family Pachytroctidae
Antennae usually have 15 segments.
The first 4-5 segments of the antennae do not have sculpturing; other segments have ringed sculpturing (annulations).
Eyes are relatively large, compared to related families.
Tarsi have 3 segments.
Hind legs are long and the femur is not flattened (as in Liposcelidae).
Adults can be have full-length wings or short wings, or can be wingless.
Full-length wings are held flat over back when at rest.
Forewings are rounded.
Forewing veins are distinct:
Areola postica is narrow, long and flat.
Pterostigma is not thickened (as in Psocomorpha).
Vein M has 2 branches.
Veins Cu2 and Cu1A reach the wing margin separately.
Abdominal segments often partially membranous on back surface.
Clunium is absent.
Phallosome is closed at the base with complex structures on the posterior end.
Subgenital plate sometimes has T-shaped sclerite, as in related families.
Gonapophyses are complete and hairless:
External valve is large without lobes.
Dany Azar, Diying Huang, Chenyang Cai, André Nel. 2015. The earliest records of pachytroctid booklice from Lebanese and Burmese Cretaceous ambers (Psocodea, Troctomorpha, Nanopsocetae, Pachytroctidae)
Cretaceous Research Volume 52, Part B, January 2015, Pages 336-347