PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Microderoceras (Eoderoceras) birchiades

Cephalopoda - Ammonitida - Eoderoceratidae

Taxonomy

Microderoceras birchiades was named by Rosenberg (1909). It is the type species of Paramicroderoceras.

It was recombined as Paramicroderoceras birchiades by Blau (1998) and Geczy and Meister (2007); it was recombined as Microderoceras (Eoderoceras) birchiades by Meister et al. (2011).

Sister species lacking formal opinion data

Eoderoceras anguiforme, Eoderoceras nothum, M. scoresbyi

Synonymy list

Year	Name and author
1909	Microderoceras birchiades Rosenberg figs. Pl. 13, fig. 5
1998	Paramicroderoceras birchiades Blau p. 231 figs. Pl 13, figs 4-8
2002	Microderoceras birchiades Rakús and Guex p. 100 figs. Pl 19, fig 8; text-fig 77
2007	Paramicroderoceras birchiades Geczy and Meister
2011	Microderoceras (Eoderoceras) birchiades Meister et al. p. 117.e32 figs. 13.12, 13.13

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

Rank	Name	Author
order	Ammonitida
suborder	Ammonitina	Hyatt 1889
superfamily	Eoderoceratoidea	(Spath 1929)
family	Eoderoceratidae	Spath 1929
subfamily	Eoderoceratinae	Spath 1929
genus	Microderoceras	Spath 1925
subgenus	Eoderoceras
species	birchiades	(Rosenberg 1909)

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.

†Microderoceras (Eoderoceras) birchiades Rosenberg 1909

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Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	4	17.0	10.3	28.0	19.1	12.5
shell diameter	4	64.5	37.0	122.0	62.0	36.2
shell inflation	4	36.6	18.6	72.0	45.3	37.8

Composition:

aragoniteo

Environment:

marinec

Locomotion:

fast-movingo

Life habit:

nektonico

Diet:

carnivoreo

Vision:

well-developedc

Created:

2005-01-28 02:27:03

Modified:

2009-10-08 14:14:55

Source: o = order, c = class

References: Kiessling 2003, Kiessling 2004

Age range: base of the Oxynotum to the top of the Jamesoni or 196.50000 to 183.00000 Ma

Collections (36 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Sinemurian	196.5 - 189.6	Mexico (Hidalgo)	Paramicroderoceras birchiades (208373)
Late/Upper Sinemurian	196.5 - 189.6	Morocco	Microderoceras birchiades (200505 200508 200509 200510 200511 200513 200517 200518 200520 200522 200523 200524 200525 200526 200527 200528 200530 200583 200585 200587 200589 200591 200593 200595 200596 200599 200603 200604 200610 200611)
Oxynotum	196.5 - 189.6	Tunisia	Microderoceras birchiades (170506)
Raricostatum	196.5 - 189.6	Austria	Paramicroderoceras birchiades (189187 189195)
Jamesoni	189.6 - 183.0	Morocco	Microderoceras birchiades (148874 148947)