Illaenidae

Illaenidae Temporal range: Ordovician–Silurian PreꞒ Ꞓ O S D C P T J K Pg N [1]
Illaenus sarsi, 25mm
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Corynexochida
Family:	†Illaenidae Hawle and Corda, 1847

The Illaenidae are a family of trilobites in the order Corynexochida. 223 currently accepted species in 24 genera are known from the Ordovician. Some scholars include the Panderiidae in the Illaenidae, but this is not generally supported.^[2]

Distribution[]

Illaenus? priscus from Salair and Illaenus? berkutensis from the Malyi Karatau, Kazakhstan (both Lower Tremadocian), are both very poorly known and it remains uncertain to which family they could best be assigned. The first certain Illaenid is I. hinomotoensis from the Upper Tremadocian of North China and South Korea. The earliest species known from Laurentia (western Ireland) is I. weaveri, probably latest Floian. These early occurrences are from the tropics, but during the Darriwilian the family spread over southern Gondwana, and became cosmopolitan for the remainder of the Ordovician, although most genera had limited distributions. The genus Stenopareia survived the Ordovician–Silurian extinction events and the family slightly rebounded with 26 species divided over three genera during the Silurian. Quadratillaenus tewoensis from North China is the youngest species known (Přídolí).^[2]

Genera[]

• Whittington 1954
• Eichwald 1825
• Shtsheglov 1827
• Burmeister 1843
• Ectillaenus Salter 1867
• Whittington 1963
• Raymond 1920
• Salter 1867
• Illaenus Dalman 1827
• Jaanusson 1954
• Salter 1867
• Jaanusson 1954
• Jaanusson 1954
• Lu 1962
• Angelin 1854
• Holm 1886
• Thaleops Conrad 1843
• Petrunina 1975
• Snajdr 1956
• Snajdr 1956
• Snajdr 1957

^[1]

References[]

This Corynexochida-related article is a stub. You can help Wikipedia by .

• v
• t