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Holcophylloceras aldersoni

Cephalopoda - Phylloceratida - Phylloceratidae

Taxonomy
Phylloceras aldersoni was named by Anderson (1938). It is a 3D body fossil. Its type locality is CAS 1348, Alderson Creek, which is in an Aptian marine horizon in the Budden Canyon Formation of California.

It was recombined as Holcophylloceras aldersoni by Khiami and Murphy (1988) and Murphy and Rodda (2006).

Sister species lacking formal opinion data
H. baraense, H. calypso, H. chonomphalum, H. mesoicum, H. totricum, H. tyungense, H. ussuriensis

Synonymy list
YearName and author
1938Phylloceras aldersoni Anderson p. 143 figs. Plate 11, figures 3, 4, 5, 6
1988Holcophylloceras aldersoni Khiami and Murphy pp. 592 - 593 figs. Figures 6.6 - 6.12, 8, 9
2006Holcophylloceras aldersoni Murphy and Rodda pp. 48 - 49 figs. Plate 1, Figure 1; Plate 4, Figures 12-15

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea()
orderPhylloceratida(Zittel 1884)
superfamilyPhylloceratoidea(Zittel 1884)
familyPhylloceratidaeZittel 1884
subfamilyCalliphylloceratinaeSpath 1927
genusHolcophyllocerasSpath 1927
speciesaldersoni()

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.

†Holcophylloceras aldersoni Anderson 1938
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Diagnosis
ReferenceDiagnosis
M. N. Khiami and M. A. Murphy 1988Adult shells with asymmetrical ribs, 5 - 6 prominent biconcave constrictions restricted to internal mold; an E/L with diphyllic or triphyllic terminations; moderately inflated, highly involute shell.
M. A. Murphy and P. U. Rodda 2006A moderately inflated, involute Holcophylloceras whose adult shells have regular, closely spaced, asymmetrical riblets; 5-6 prominent biconcave constrictions of the internal mold that are not expressed on the outer shell; an E/L with diphyllic or triphyllic saddle terminations.
Measurements
No measurements are available
Composition: aragoniteo
Environment: marinec
Locomotion: actively mobileo
Life habit: nektonico
Diet: carnivoreo
Vision: well-developedc
Created: 2009-09-27 10:11:29
Modified: 2009-09-27 12:11:29
Source: o = order, c = class
References: Kiessling 2003, Kiessling 2004, Hendy et al. 2009

Age range: Late/Upper Aptian or 122.46000 to 113.00000 Ma

Collections (8 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Aptian122.46 - 113.0USA (California) Holcophylloceras aldersoni (216346) Phylloceras aldersoni (216335 216336 216337 216338 216340 216347 216432)