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Helcionopsis

Tergomya - Tryblidiida - Tryblidiidae

Taxonomy
Helcionopsis was named by Ulrich and Scofield (1897) [Sepkoski's age data: Cm lMid O Ashg-m Sepkoski's reference number: 110,615]. It is not extant. Its type is Helcionopsis striata.

It was assigned to Tryblidiidae by Starobogatov (1970), Runnegar and Jell (1976); to Tryblidiinae by Knight and Yochelson (1960), Wahlman (1992); and to Tryblidiida by Sepkoski (2002).

Synonymy list
YearName and author
1897Helcionopsis Ulrich and Scofield
1960Helcionopsis Knight and Yochelson p. 79
1970Helcionopsis Starobogatov p. 301
1976Helcionopsis Runnegar and Jell p. 119
1992Helcionopsis Wahlman
2002Helcionopsis Sepkoski

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classTergomya
orderTryblidiida()
superfamilyTryblidioidea()
familyTryblidiidae
subfamilyTryblidiinae
genusHelcionopsis

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.

G. †Helcionopsis Ulrich and Scofield 1897
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†Helcionopsis depressum Ulrich and Scofield 1897
†Helcionopsis radiatum Lindström 1884
†Helcionopsis reticulatus Easton 1943
†Helcionopsis striata Ulrich and Scofield 1897
†Helcionopsis subcarinata Ulrich and Scofield 1897
†Helcionopsis wisconsinensis Ulrich and Scofield 1897
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Locomotion: actively mobileo
Life habit: epifaunalo
Diet: grazero
Vision: blindc
Created: 2009-04-21 11:50:45
Modified: 2009-04-21 13:50:45
Source: o = order, c = class
Reference: Hendy et al. 2009

Age range: base of the Cassinian to the top of the Ashgill or 483.40000 to 443.10000 Ma

Collections (20 total)


Time interval Ma Country or state Original ID and collection number
Cassinian483.4 - 471.3USA (Minnesota) H. sp. (56645)
Turinian457.3 - 453.8USA (Missouri) H. sp. undet. (175724)
Blackriveran457.3 - 449.6USA (Illinois, Iowa) Platyceras wisconsinense (23613 23614 23615)
Blackriveran457.3 - 449.6USA (Minnesota) Platyceras wisconsinense (23555 23556)
Blackriveran457.3 - 449.6USA (Wisconsin) Platyceras wisconsinense (154948)
Blackriveran - Rocklandian457.3 - 449.6USA (Illinois, Iowa) Platyceras depressum (23621)
Blackriveran - Rocklandian457.3 - 449.6USA (Minnesota) Platyceras depressum (23557)
Kirkfieldian457.3 - 449.6USA (Illinois, Iowa) Platyceras depressum (23623 23644)
Rocklandian - Kirkfieldian457.3 - 449.6USA (Illinois, Iowa) Platyceras depressum (23622)
Rocklandian - Kirkfieldian457.3 - 449.6USA (Minnesota) Platyceras depressum (23558)
Shermanian457.3 - 449.6USA (Minnesota) Platyceras depressum (23579)
Shermanian457.3 - 449.6USA (Illinois, Iowa) Platyceras depressum (23651 23653 23656)
Maysvillian450.2 - 449.6USA (Tennessee) H. striata (5391)
Richmondian - Ashgill449.6 - 443.1USA (Ohio) H. sp. (394)