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

Hypophylloceras (Neophylloceras) ramosum

Cephalopoda - Phylloceratida - Phylloceratidae

Taxonomy
Ammonites (Scaphites) ramosus was named by Meek (1857). Its type specimen is USNM 12451, a shell, and it is a 3D body fossil. Its type locality is Naibuchi Area, Eupachydiscus haradai ammonite zone, Sakhalin, which is in a Maastrichtian marine sandstone/shale in the Russian Federation.

It was recombined as Neophylloceras ramosum by Matsumoto (1959), Henderson (1970); it was recombined as Ammonites (Scaphites) ramosum by Jones (1963), Matsumoto (1984); it was recombined as Phylloceras (Neophylloceras) ramosum by Henderson and McNamara (1985), Ward and Kennedy (1993); it was recombined as Hypophylloceras (Neophylloceras) ramosus by Wright et al. (1996); it was recombined as Hypophylloceras (Neophylloceras) ramosum by Salazar et al. (2010).

Synonyms
Synonymy list
YearName and author
1857Ammonites (Scaphites) ramosus Meek
1958Phylloceras vaculae Anderson p. 181 figs. Pl 40, figs 3,3a,3b
1958Phylloceras pachecoense Anderson p. 182 figs. Plate 53, figures 1, 1a
1958Phylloceras pachecoensis Anderson p. 182 figs. Pl 53, figs 1,1a
1959Neophylloceras ramosum Matsumoto p. 1 figs. Pl.1, fig. 1a-d; Pl.2, fig.2; Pl. 8, fig.1a-c
1963Ammonites (Scaphites) ramosum Jones p. 22
1970Neophylloceras ramosum Henderson
1984Ammonites (Scaphites) ramosum Matsumoto p. 9
1985Phylloceras (Neophylloceras) ramosum Henderson and McNamara p. 40 figs. Pl 1, figs 1-3; text-fig 3c
1993Phylloceras (Neophylloceras) ramosum Ward and Kennedy p. 15 figs. 17.2, 17.5, 17.6
1996Hypophylloceras (Neophylloceras) ramosus Wright et al. p. 1
2010Hypophylloceras (Neophylloceras) ramosum Salazar et al. p. 184 figs. 3, 4a-d,m

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea()
orderPhylloceratida(Zittel 1884)
superfamilyPhylloceratoidea(Zittel 1884)
familyPhylloceratidaeZittel 1884
subfamilyPhylloceratinaeZittel 1884
genusHypophyllocerasShimizu 1934
subgenusNeophylloceras
speciesramosum(Meek 1857)

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.

show all | hide all
Invalid names: Phylloceras pachecoense Anderson 1958 [synonym], Phylloceras pachecoensis Anderson 1958 [synonym], Phylloceras vaculae Anderson 1958 [synonym]
Diagnosis
ReferenceDiagnosis
T. Matsumoto 1959The species is characterized by a thin shell, great involution, very small umbilicus (less than 10 percent of the shell diameter), much compressed whorls, narrowly arched venter, rounded umbilical border, nearly parallel, rather than convergent, and only slightly convex flanks, thread-1ike, fine, narrow, and densely spaced subcostae, which incline moderately forward near the umbilicus, bend just below the mid-flank, run almost radially on the rest of the Hanks, and again incline slightly forward near the venter, thus showing flexuosity. Near the umbilical half of the whorl can be seen the very faint, periodic constrictions, which give rise, on the surface of the shell, to low and narrow major ribs. The suture is very complicated, deeply and finely incised and has multipartite saddles, of which the phylloid terminals are indistinct. Minute phylloid terminals, however, are discernible, when the suture is not fully exposed but observed through the semi-transparent, inner layer of the shel1.
Measurements
partNmeanminimummaximummedians.d.
shell height1620.86.5040.024.29.33
shell diameter1634.912.064.040.515.1
shell inflation162.751.005.003.001.04

Composition: aragoniteo
Entire body: yess
Adult length: 10 to < 100s
Adult width: 10 to < 100s
Adult height: 10 to < 100s
Environment: marinec
Locomotion: actively mobileo
Life habit: nektonico
Diet: carnivoreo
Vision: well-developedc
Created: 2009-02-28 22:02:17
Modified: 2009-03-01 00:02:17
Source: s = species, o = order, c = class
References: Hendy et al. 2009, Kiessling 2003, Kiessling 2004, Matsumoto 1984

Age range: base of the Early/Lower Albian to the top of the Early/Lower Maastrichtian or 113.20000 to 66.00000 Ma

Collections (41 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Albian113.2 - 110.1USA (California) Phylloceras ramosum (176021)
Late/Upper Cretaceous100.5 - 66.0USA (California) Neophylloceras ramosum (225630)
Late/Upper Turonian93.9 - 89.8USA (California) Neophylloceras ramosum (222110 222111 225638) Neophylloceras ramosum, Phylloceras vaculae (215570)
Late/Upper Turonian93.9 - 89.8Russian Federation Neophylloceras ramosum (84214)
Middle Turonian93.9 - 89.8Russian Federation Neophylloceras ramosum (84216)
Turonian93.9 - 89.8USA (California) Neophylloceras ramosum (44213 215310) Phylloceras vaculae (44205)
Late/Upper Santonian85.7 - 83.6Canada (British Columbia) Neophylloceras ramosum (210549)
Campanian83.6 - 72.2USA (Washington) Neophylloceras ramosum (86868)
Campanian83.6 - 72.2USA (California) Neophylloceras ramosum (225927)
Campanian83.6 - 72.2Japan Neophylloceras ramosum (87023)
Early/Lower Campanian83.6 - 72.2USA (California) Neophylloceras ramosum (86938)
Late/Upper Campanian83.6 - 72.2USA (Alaska) Neophylloceras ramosum (63935 63936 64020 64021 64022 64023 64024 88063)
Late/Upper Campanian83.6 - 72.2USA (California) Neophylloceras ramosum (225635) Phylloceras pachecoense (215436) Phylloceras ramosum (86819)
Campanian - Maastrichtian83.6 - 66.0USA (Alaska) Neophylloceras ramosum (88820)
Late/Upper Campanian - Early/Lower Maastrichtian83.6 - 66.0USA (Alaska) Neophylloceras ramosum (158217)
Late/Upper Campanian - Early/Lower Maastrichtian83.6 - 66.0Canada (British Columbia) Ammonites ramosus (241585)
Late/Upper Campanian - Maastrichtian83.6 - 66.0USA (Alaska) Neophylloceras ramosum (88888)
Late/Upper Maastrichtian72.2 - 66.0Chile Hypophylloceras ramosum (165489 165490 165491 165492)
Maastrichtian72.2 - 66.0Russian Federation (Sakhalin) Phylloceras ramosum (type locality: 64610)
Maastrichtian72.2 - 66.0Australia (Western Australia) Phylloceras ramosum (83845 83852 157777 157778)
Maastrichtian72.2 - 66.0USA (California) Phylloceras pachecoense (83778)