Asaphus punctatus

Taxonomy

Kingdom: Animalia
Phylum: Arthropoda
Class: Trilobita
Order: Asaphida
Family: Asaphidae
Genus: Asaphus
Species: Asaphus punctatus
Author Citation Lesnikova, 1949

Geological Time Scale

Eon: Phanerozoic
Era: Paleozoic
Period: Ordovician
Sub Period: None
Epoch: Middle
International Age: Darriwilian

Stratigraphy

Duboviki

Biostratigraphy

Upper Kotlukovi-Punctatus
Aseri

Provenance

Date Collected: 02/28/2018
Acquired by: Purchase/Trade

Dimensions

Length: 85 mm
Width: 56 mm

Location

Lomaha Quarry
St Petersburg
Russia

• aspahid
• ordovician
• russia
• trilobite

Comments

Specimen is prone with slight raising of cephalon in seabed burial position. 

 

Excerpt from:

Ivanstov, A. Yu. (2003) "Ordovician Trilobites of the Subfamily Asaphinae of the Ladoga Glint." Paleontological Journal v. 37, supp. 3

 

H o l o t y p e (monotype). DPStPSU, no. 580/9243, 

 

D i a g n o s i s . Cephalon medium-proportionate, without beaklike bend, glabella not reaching anterior margin; basal lobes lenslike; mdiments of glabellar lobes absent; occipital furrow deep; paradoublural furrows absent; cranidium with broad short lingula; marginal bend of anterior branch of facial suture rounded; bend of eye base reverse; eyes medium-long, high, removed from posterior margin for about half of their length; eye pedicles short and thick; eye lists present; ocular areas not elevated above cephalon or convex, with tubercles; occipital ring convex; pygidium medium-proportionate or weakly elongated; with rounded lateral margins and posterior end, rachis faintly subdivided; terracelike folds present on anterior part of frontal lobe and absent from librigenae.