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Trilobita - Corynexochida - Illaenidae

Synonymy list
YearName and author
1827Illaenus Dalman
1916Illaenus Raymond p. 4
1925Illaenus Warburg
1964Illaenus Neuman
1980Illaenus Owen and Bruton
1988Illaenus Bruton and Owen
1998Illaenus Zhou et al. p. 714
1999Illaenus Fortey and Droser p. 192
2002Illaenus Sepkoski, Jr.
2003Illaenus Jell and Adrain p. 387
2013Illaenus Fortey and Bruton

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EubilateriaAx 1987
phylumArthropodaLatreille 1829
classTrilobitaWalch 1771
orderCorynexochidaKobayashi 1935
familyIllaenidaeHawle and Corda 1847
genusIllaenusDalman 1827

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

No diagnoses are available
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Entire body: yesg
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Spines: noneg
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: actively mobileo
Life habit: nektobenthico
Diet: carnivoreo
Vision: well-developedg
Comments: BODY SIZE: Data from Harrington et al. (1959).g
Created: 2009-06-09 11:45:35
Modified: 2009-12-14 08:27:47
Source: g = genus, o = order, c = class
References: Harrington et al. 1959, Aberhan et al. 2004, Hendy et al. 2009

Age range: base of the Dawan to the top of the Sheinwoodian or 478.60000 to 430.50000 Ma

Collections (445 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Ibexian488.3 - 471.8USA (Nevada) I. sp. (104441) I. utahensis (104440)
Tremadoc485.4 - 477.7China (Hunan) I. sp. (7694 7695)
Tremadoc485.4 - 477.7China (HeBei) I. sp. (7983)
Tremadoc485.4 - 477.7China (Heibei Provence) I. hinomotoensis (157258 157261 157265)
Tremadoc485.4 - 477.7China (Jilin Provence) I. hinomotoensis (157250)
Tremadocian485.4 - 477.7Iran I. hinomotoensis (66865 66870)
Tulean485.4 - 471.8Norway (Spitsbergen) I. primoticus (189837)
Tulean - Blackhillsian485.4 - 471.8Canada (Newfoundland and Labrador) I. sp. (196381 196383)
Tulean - Blackhillsian485.4 - 471.8USA (Nevada) I. sp. (77186)
Early/Lower Ordovician485.4 - 470.0Canada (Newfoundland) I. tumidifrons (198245)

Youngest occurrences

Time interval Ma Country or state PBDB collection number
Pirgu - Hirnantian449.5 - 443.4Sweden (Dalarne) I. avus (73414) I. roemeri, I. oviformis (73408)
Hirnantian445.2 - 443.4Sweden (Jamtland) I. sp. (153331)
Hirnantian445.2 - 443.4Sweden (Dalarne) I. roemeri (73410 73460)
Hirnantian445.2 - 443.4Norway (Oslo-Asker District) I. sp. (364)
Llandovery443.4 - 433.4China (Zhejiang) I. sp. (27741)
Llandovery443.4 - 433.4USA (Indiana) I. sp. (13291)
Telychian - Sheinwoodian438.5 - 430.5USA (Indiana) I. sp. (26803)
Telychian - Wenlock438.5 - 427.4USA (Indiana) I. sp. (26805)
Wenlock433.4 - 427.4USA (Indiana) I. sp. (26794)
Wenlock - Ludlow433.4 - 423.0Canada (Northwest Territories) I. sp. (188860)