PBDB Taxon

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

Biarmatoidella

Gastropoda - Eucyclidae

Taxonomy

Biarmatoidella was named by Gründel (2003).

It was assigned to Calliotropinae by Gründel et al. (2012).

Species

B. lorioli (syn. Riselloidea triarmata, Riselloidea biarmata, Trochus biarmatus, Trochus bitorquatus, Monodonta biarmata)

Synonymy list

Year	Name and author
2003	Biarmatoidella Gründel
2012	Biarmatoidella Gründel et al.

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

Rank	Name	Author
class	Gastropoda
subclass	Vetigastropoda	(Salvini-Plawen 1980)
superfamily	Seguenzioidea	Verril 1884
family	Eucyclidae	Koken 1896
subfamily	Calliotropinae	Hickman and McLean 1990
genus	Biarmatoidella	Gründel 2003

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. †Biarmatoidella Gründel 2003

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†Biarmatoidella lorioli Greppin 1898

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Invalid names: Monodonta biarmata Münster 1867 [synonym], Riselloidea biarmata Bosch 1998 [synonym], Riselloidea triarmata Hebert and Deslongchamps 1860 [synonym], Trochus biarmatus Münster 1844 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitec

Locomotion:

actively mobilesuperf

Life habit:

epifaunalsuperf

Diet:

grazersuperf

Vision:

limitedc

Created:

2009-09-10 08:46:29

Modified:

2009-09-10 10:47:18

Source: superf = superfamily, c = class

References: Kiessling 2004, Hendy et al. 2009

Age range

Maximum range based only on fossils: base of the Early/Lower Bajocian to the top of the Middle Bathonian or 170.90000 to 165.30000 Ma
Minimum age of oldest fossil (stem group age): 168.6 Ma

Collections (11 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Bajocian	170.9 - 168.6	Germany	B. lorioli (150927 150928 151069)
Sauzei	170.9 - 168.2	Morocco	Riselloidea biarmata (97894)
Late/Upper Bajocian	168.6 - 168.2	Poland	Calliotropis biarmata (63073)
Bathonian	168.2 - 165.3	Poland	Calliotropis biarmata (63076)
Late/Upper Bathonian	168.2 - 165.3	Germany	Riselloidea biarmata (58242)
Middle Bathonian	168.2 - 165.3	Poland	Calliotropis biarmata (63077 63078)
Bathonian - Middle Callovian	168.2 - 161.5	Germany	Riselloidea biarmata (58258 58380)