PBDB Taxon

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Derbyia acutangula

Strophomenata - Orthotetida - Derbyiidae

Taxonomy

Schellwienella acutangula was named by Huang (1933).

It was recombined as Derbyia acutangula by Tong (1978), Zhan (1979), Liao (1980), Liao (1987), Shen and Shi (2007), Wu et al. (2019).

Sister species lacking formal opinion data

D. ciscoensis, D. deercreekensis, D. kansasensis, D. plattsmouthensis, D. robusta

Synonyms

Derbyia mucronata was named by Liao (1980). Its type specimen is NIGP 43439 and is a mold. Its type locality is Bulang Section BM7, Puding County, which is in a Wuchiapingian marine horizon in the Longtan Formation of China.

It was synonymized subjectively with Derbyia acutangula by Shen and Shi (2007).
Magniderbyia lata was named by Zhan (1979). Its type specimen is K-0057 and is a mold. Its type locality is Damaikong, Lianxian Area, Wangpanli Fm, which is in a Changhsingian coastal siliciclastic in the Wangpanli Formation of China.

It was synonymized subjectively with Magniderbyia guangdongensis by Shen and Shi (2007).
Magniderbyia guangdongensis was named by Ni (1977). It is a mold. Its type locality is Shaoguan County, Longtan Formation, which is in a Wuchiapingian marine siliciclastic in the Longtan Formation of China.

It was synonymized subjectively with Derbyia acutangula by Shen and Shi (2007).

Synonymy list

Year	Name and author
1933	Schellwienella acutangula Huang p. 24 figs. Pl 3, figs 12-18
1977	Magniderbyia guangdongensis Ni p. 325 figs. Pl 134, figs 7,8
1978	Derbyia acutangula Tong p. 215 figs. Pl 78, fig 7
1979	Derbyia acutangula Zhan p. 68 figs. Pl 4, figs 10,11
1979	Magniderbyia lata Zhan p. 69 figs. Pl 11, figs 3-4
1980	Derbyia acutangula Liao p. 255 figs. Pl 2, fig 25
1980	Derbyia mucronata Liao p. 255 figs. Pl 2, figs 17-20
1987	Derbyia acutangula Liao figs. Pl 3, figs 14-17
2007	Derbyia acutangula Shen and Shi p. 30 figs. Pl 11, figs 1-26
2019	Derbyia acutangula Wu et al. p. 619 fig. 6A

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

Rank	Name	Author
phylum	Brachiopoda	Cuvier 1805
subphylum	Rhynchonelliformea	Williams et al. 1996
class	Strophomenata	Williams et al 1996
order	Orthotetida	Waagen 1884
superfamily	Orthotetoidea
family	Derbyiidae
genus	Derbyia
species	acutangula	()

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 acutangula Huang 1933

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Invalid names: Derbyia guangdongensis Ni 1977 [synonym], Derbyia mucronata Liao 1980 [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	7	12.6	10.0	16.7	11.2	2.80

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 Wuchiapingian to the top of the Changhsingian or 259.90000 to 252.17000 Ma

Collections (40 total)

Time interval	Ma	Country or state	Original ID and collection number
Wuchiapingian	259.9 - 254.17	China (Sichuan)	Magniderbyia sp. (56610)
Wuchiapingian	259.9 - 254.17	China (Qinghai)	Megaderbyia subquadrata (103609)
Wuchiapingian	259.9 - 254.17	China (Guangxi)	Derbyia acutangula (112364)
Wuchiapingian	259.9 - 254.17	China (Guangdong)	Derbyia acutangula (95678) Magniderbyia guangdongensis (121089 121099) Magniderbyia lata (109797)
Wuchiapingian	259.9 - 254.17	China (Chongqing)	Derbyia acutangula (103449)
Wuchiapingian	259.9 - 254.17	China (Guizhou)	Derbyia acutangula (112002 117463 138496 138498 138499 138500 138501 138506 138558) Derbyia mucronata (86600) Derbyia mucronata, Derbyia acutangula (111994 112001) Schellwienella acutangula (110326 110971 110972 110976)
Changhsingian	254.17 - 252.17	China (Guizhou)	Derbyia acutangula (180415) Derbyia acutangula, Derbyia guangdongensis (117481 117486)
Changhsingian	254.17 - 252.17	China (Guangxi)	Derbyia acutangula (138533)
Changhsingian	254.17 - 252.17	China (Sichuan)	Derbyia mucronata, Derbyia acutangula (95285)
Changhsingian	254.17 - 252.17	China (Guangdong)	Magniderbyia lata (95679)
Changhsingian	254.17 - 252.17	China (Chongqing)	Derbyia acutangula (94984 94985 138386 138389 138455 138456 138466) Derbyia guangdongensis (94966 94967 94968)