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Pentagnostus (Meragnostus) segmenta

Agnostida - Peronopsidae

Taxonomy
Peronopsis segmenta was named by Robison (1964). Its type specimen is USNM 141215, a pygidium, and it is a 3D body fossil.

It was recombined as Pentagnostus (Meragnostus) segmenta by Naimark (2012).

Sister species lacking formal opinion data
P. rectus

Synonymy list
YearName and author
1964Peronopsis segmenta Robison pp. 530 - 531 figs. P1. 81, figs. 24-28
2012Pentagnostus (Meragnostus) segmenta Naimark p. 1178 figs. pl. 7 f. 3

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
RankNameAuthor
orderAgnostidaSalter 1864
suborderAgnostinaSalter 1864
superfamilyAgnostoideaM'Coy 1849
familyPeronopsidaeWestergard 1936
genusPentagnostusLermontova 1940
subgenusMeragnostus
speciessegmenta()

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.

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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Entire body: yesf
Adult length: 0.1 to < 1.0f
Adult width: 1.0 to < 10f
Ontogeny: accretion, moltingsuperf
Environment: marinesuperf
Locomotion: actively mobilesuperf
Life habit: nektonicsuperf
Diet: suspension feedersuperf
Vision: blindf
Created: 2009-06-11 19:59:08
Modified: 2009-12-13 04:36:38
Source: f = family, superf = superfamily
References: Hendy 2009, Robison 1994

Age range: base of the Middle Cambrian to the top of the Dresbachian or 509.00000 to 485.40000 Ma

Collections (14 total)


Time interval Ma Country or state Original ID and collection number
Delamaran511.2 - 506.5USA (Utah) Peronopsis segmenta (10566)
Middle Cambrian509.0 - 497.0USA (Utah) Peronopsis segmenta (86740 86741 156504 156506)
Middle Cambrian509.0 - 497.0USA (Nevada) Peronopsis segmenta (156510)
Drumian504.5 - 500.5USA (Utah) Peronopsis segmenta (230679)
Menevian504.5 - 499.5USA (Utah) Peronopsis segmenta (10567)
Marjumian504.5 - 497.0Canada (Newfoundland and Labrador) Peronopsis segmenta (9681 9684 9687 9691)
Marjumian504.5 - 497.0USA (Utah) Peronopsis segmenta (230682)
Dresbachian497.0 - 485.4Canada (Newfoundland and Labrador) Peronopsis segmenta (9703)