PBDB Taxon

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Submeekoceras hsuyuchieni

Cephalopoda - Ceratitida - Arctoceratidae

Taxonomy

Prionolobus hsuyuchieni was named by Chao (1959).

It was synonymized subjectively with Submeekoceras mushbachanum by Brayard and Bucher (2008), Brayard et al. (2013); it was recombined as Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).

Sister species lacking formal opinion data

S. longiseptum

Synonyms

Paranorites ovalis was named by Chao (1959).

It was synonymized subjectively with Submeekoceras mushbachanum by Brayard and Bucher (2008); it was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).
Meekoceras densistriatum was named by Chao (1959).

It was synonymized subjectively with Submeekoceras mushbachanum by Brayard and Bucher (2008), Brühwiler and Bucher (2012), Brayard et al. (2013); it was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).
Meekoceras yukiangense was named by Chao (1959).

It was synonymized subjectively with Submeekoceras mushbachanum by Brayard and Bucher (2008), Brühwiler and Bucher (2012), Brayard et al. (2013); it was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).
Meekoceras kaohwaiense was named by Chao (1959).

It was synonymized subjectively with Submeekoceras mushbachanum by Brayard and Bucher (2008), Brühwiler and Bucher (2012), Brayard et al. (2013); it was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).
Meekoceras lativentrosum was named by Chao (1959).

It was synonymized subjectively with Submeekoceras mushbachanum by Brayard and Bucher (2008), Brühwiler and Bucher (2012), Brayard et al. (2013); it was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).
Meekoceras (Submeekoceras) subquadratum was named by Chao (1959).

It was synonymized subjectively with Submeekoceras mushbachanum by Brühwiler and Bucher (2012), Brayard et al. (2013); it was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).
Paranorites linguisellatus was named by Chao (1959).

It was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).
Meekoceras (Submeekoceras) quadratum was named by Chao (1959).

It was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014); it was recombined as Submeekoceras quadratum by Zakharov and Smyshlyaeva (2025).
Meekoceras (Submeekoceras) lolouense was named by Chao (1959).

It was synonymized subjectively with Nordophiceras compressum by Kummel (1969); it was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014).
Meekoceras (Submeekoceras) longiseptatum was named by Chao (1959).

It was synonymized subjectively with Nordophiceras compressum by Kummel (1969); it was synonymized subjectively with Submeekoceras hsuyuchieni by Shigeta and Nguyen (2014); it was recombined as Submeekoceras longiseptatum by Zakharov and Smyshlyaeva (2025).

Synonymy list

Year	Name and author
1959	Meekoceras densistriatum Chao
1959	Meekoceras kaohwaiense Chao
1959	Meekoceras lativentrosum Chao
1959	Meekoceras yukiangense Chao
1959	Paranorites ovalis Chao
1959	Prionolobus hsuyuchieni Chao
1959	Paranorites linguisellatus Chao p. 218 figs. Pl 10, figs 1,2; text-fig 16c
1959	Meekoceras (Submeekoceras) subquadratum Chao p. 317 figs. Pl 14, figs 1-5; pl 39, figs 8,9; text-fig 45c
1959	Meekoceras (Submeekoceras) quadratum Chao p. 318 figs. Pl 39, figs 10-11, 22-23
1959	Meekoceras (Submeekoceras) lolouense Chao p. 320 figs. Pl 10, figs 7-8; text-fig 45d
1959	Meekoceras (Submeekoceras) longiseptatum Chao p. 321 figs. Pl 10, figs 5,6; text-fig 46c
1988	Paranorites ovalis Xu p. 449 figs. Pl 3, figs 2,7; text-fig 20
2014	Submeekoceras hsuyuchieni Shigeta and Nguyen p. 107 figs. 76-78
2025	Submeekoceras longiseptatum Zakharov and Smyshlyaeva p. 139
2025	Submeekoceras quadratum Zakharov and Smyshlyaeva p. 139

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Cephalopoda	Cuvier 1797

Rank	Name	Author
subclass	Ammonoidea	()
order	Ceratitida	Hyatt 1884
suborder	Meekoceratina
superfamily	Meekoceratoidea	Waagen 1895
family	Arctoceratidae	Arthaber 1911
genus	Submeekoceras
species	hsuyuchieni	(Chao 1959)

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.

†Submeekoceras hsuyuchieni Chao 1959

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Invalid names: Meekoceras (Submeekoceras) lolouense Chao 1959 [synonym], Meekoceras (Submeekoceras) longiseptatum Chao 1959 [synonym], Meekoceras (Submeekoceras) quadratum Chao 1959 [synonym], Meekoceras (Submeekoceras) subquadratum Chao 1959 [synonym], Meekoceras densistriatum Chao 1959 [synonym], Meekoceras kaohwaiense Chao 1959 [synonym], Meekoceras lativentrosum Chao 1959 [synonym], Meekoceras yukiangense Chao 1959 [synonym], Paranorites linguisellatus Chao 1959 [synonym], Paranorites ovalis Chao 1959 [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	10	19.9	4.80	37.0	22.2	9.15
shell diameter	10	46.9	11.1	95.0	51.2	23.5
shell inflation	10	12.4	2.50	32.0	13.5	8.16

Composition:

aragoniteo

Environment:

marinec

Locomotion:

actively mobileo

Life habit:

nektonico

Diet:

carnivoreo

Vision:

well-developedc

Created:

2005-01-28 02:33:06

Modified:

2005-10-06 16:36:47

Source: o = order, c = class

References: Kiessling 2003, Kiessling 2004

Age range: base of the Dienerian to the top of the Spathian or 250.50000 to 246.70000 Ma

Collections (22 total)

Time interval	Ma	Country or state	Original ID and collection number
Dienerian	250.5 - 249.9	China (Guangxi)	Prionolobus hsuyuchieni (44001)
Dienerian	250.5 - 249.9	China (Hubei)	Paranorites ovalis (95718)
Smithian	249.9 - 248.1	Afghanistan (Pakhtia)	Arctoceras mushbachanum (44119 44121)
Smithian	249.9 - 248.1	China (Guangxi)	Submeekoceras mushbachanum (97135 97136 97141 97142 97143 97144 97145 97146 97148 97149)
Smithian	249.9 - 248.1	Vietnam	Submeekoceras hsuyuchieni (155480 155485 155499 155543)
Smithian	249.9 - 248.1	China (Gunagxi)	Meekoceras yukiangense, Meekoceras lativentrosum, Meekoceras quadratum (44014) Paranorites ovalis, Paranorites linguisellatus (44000)
Olenekian	249.9 - 246.7	Vietnam	Meekoceras yukiangense (44754)
Spathian	248.1 - 246.7	China (Guangxi)	Submeekoceras lolouense (44005)