PBDB Taxon

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Bollandoceras micronotum

Cephalopoda - Goniatitida - Maxigoniatitidae

Taxonomy

Goniatites micronotus was named by Phillips (1836). Its type specimen is c262a, Natural History Museum, a shell, and it is a 3D body fossil.

It was recombined as Glyphioceras micronotum by Foord and Crick (1897); it was recombined as Beyrichoceras micronotum by Bisat (1924); it was recombined as Bollandoceras micronotum by Korn and Tilsley (2006).

Synonyms

Beyrichoceras submicronotum was named by Bisat (1934).

It was recombined as Bollandoceras submicronotum by Bisat (1952); it was synonymized subjectively with Bollandoceras micronotum by Korn and Tilsley (2006).

Synonymy list

Year	Name and author
1836	Goniatites micronotus Phillips p. 234 figs. pl. 19 figs 22-23
1897	Glyphioceras micronotum Foord and Crick p. 173 fig. 74
1924	Beyrichoceras micronotum Bisat p. 85
1934	Beyrichoceras submicronotum Bisat p. 291 figs. pl. 23 figs 5,6, textfig. 19
1952	Bollandoceras submicronotum Bisat
2006	Bollandoceras micronotum Korn and Tilsley pp. 125 - 127 figs. 4F, G, 5 A, B, HA-H,12A-M

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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	Goniatitida	Hyatt 1884
suborder	Goniatitina	Hyatt 1884
superfamily	Pericycloidea	(Hyatt 1900)
family	Maxigoniatitidae
genus	Bollandoceras	Bisat 1952
species	micronotum	()

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.

†Bollandoceras micronotum Phillips 1836

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Invalid names: Bollandoceras submicronotum Bisat 1934 [synonym]

Diagnosis

Reference	Diagnosis
D. Korn and J. W. Tilsley 2006	Species of Bollandoceras with pachyconic conch in juveniles stages (ww/dm 0.70-0.80 up to 6 mm diameter); relative conch width decreasing during ontogeny to 0.40 at a diameter of 40 mm. Umbilicus relatively widest at 2-3 mm diameter (uw/dm 0.40), becoming very narrow (uw/dm 0.10-0.15) between 10 and 40 mm. Whorl expansion rate low in juveniles (WER 1.50), increasing to more than 2.00 at more than 16 mm diameter (WER 2.15 at 30-40 mm diameter). Ornament of biconvex growth lines; steinkern with faint, slightly biconvex constrictions. Suture with gently inflexed, slightly diverging flanks of the external lobe

Measurements

No measurements are available

Composition:

aragoniteo

Environment:

marinec

Locomotion:

fast-movingo

Life habit:

nektonico

Diet:

carnivoreo

Vision:

well-developedc

Created:

2005-01-28 02:36:55

Modified:

2005-10-06 16:36:08

Source: o = order, c = class

References: Kiessling 2003, Kiessling 2004

Age range: Asbian or 339.90000 to 335.90000 Ma

Collections (4 total)

Time interval	Ma	Country or state	Original ID and collection number
Asbian	339.9 - 335.9	United Kingdom (England)	Beyrichoceras micronotum, Beyrichoceras submicronotum (5995) Beyrichoceras submicronotum (69304) Bollandoceras micronotum (242121) Bollandoceras sp. (5966)