Burmipachytrocta singularis Azar et al., 2015

Taxonomy

thick barklouse

Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Psocodea
Family: Pachytroctidae
Genus: Burmipachytrocta
Species: Burmipachytrocta singularis

Geological Time Scale

Eon: Phanerozoic
Era: Mesozoic
Period: Cretaceous
Sub Period: None
Epoch: Middle
International Age: Albian (early)

Stratigraphy

unknown formation

Provenance

Acquired by: Purchase/Trade

Location

Hkamti mine
Hkamti District
Sagaing Region
Burma

• albian
• barklouse
• burmipachytrocta
• cretaceous
• hkamti
• pachytroctidae
• tapinellinae
• tff-oilshale-ar2354

Comments

Characteristics of the family Pachytroctidae

Head:  

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.

Legs: 

Tarsi have 3 segments.

Hind legs are long and the femur is not flattened (as in Liposcelidae).

Wings: 

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.

Abdomen:

Abdominal segments often partially membranous on back surface.

Male: 

Clunium is absent.

Phallosome is closed at the base with complex structures on the posterior end.

Female: 

Subgenital plate sometimes has T-shaped sclerite, as in related families.

Gonapophyses are complete and hairless:

External valve is large without lobes.

 

 

References:

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.