PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Derbyia informis

Strophomenata - Orthotetida - Derbyiidae

Taxonomy

Derbyia informis was named by Cooper and Grant (1974). Its type specimen is USNM 152606c, a shell (Articulated shell), and it is not a trace fossil.

Sister species lacking formal opinion data

D. ciscoensis, D. crassa, D. cymula, D. deercreekensis, D. hemisphaerica, D. hemisphaerica, D. hindi, D. jacksborosis, D. kansasensis, D. magna, D. plattsmouthensis, D. robusta, D. subcircularis, D. texana, D. wabashensis

Synonymy list

Year	Name and author
1974	Derbyia informis Cooper and Grant pp. 302-304 figs. Pl 76, figs 1-8; pl 77, figs 1-12; pl 78, figs 1-20; pl 81, figs 1-3

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
—	Lophophorata
—	Panbrachiopoda	Carlson and Cohen 2020
phylum	Brachiopoda	Cuvier 1805

Rank	Name	Author
subphylum	Rhynchonelliformea	Williams et al. 1996
class	Strophomenata	Williams et al 1996
order	Orthotetida	Waagen 1884
suborder	Orthotetidina
superfamily	Orthotetoidea	()
family	Derbyiidae
genus	Derbyia
species	informis

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.

†Derbyia informis Cooper and Grant 1974

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Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	12	18.5	4.70	49.0	20.4	14.0

Composition:

low Mg calcitep

Environment:

marineuc

Locomotion:

stationaryp

Attached:

yesp

Life habit:

low-level epifaunalp

Diet:

suspension feederp

Vision:

blindc

Created:

2010-02-15 05:25:57

Modified:

2010-02-15 07:25:57

Source: c = class, p = phylum, uc = unranked clade

References: Aberhan et al. 2004, Nesnidal et al. 2013

Age range: base of the Kungurian to the top of the Roadian or 283.30000 to 266.90000 Ma

Collections (29 total)

Time interval	Ma	Country or state	Original ID and collection number
Kungurian	283.3 - 274.4	USA (Texas)	Derbyia informis (43491 43494 43495 43501 43504 43510 43513 43515 43516 43517 43585 81638 101785 105687 105853 105879 105931 105935 106286)
Roadian	274.4 - 266.9	USA (Texas)	Derbyia informis (43512 43518 43563 43598 81640 101781 101807 102604 102606 105805)