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Hypophylloceras (Neophylloceras) ramosum
Taxonomy
Ammonites (Scaphites) ramosus was named by Meek (1857). It is not a trace fossil.
It was recombined as Neophylloceras ramosum by Matsumoto (1959) and Henderson (1970); it was recombined as Ammonites (Scaphites) ramosum by Jones (1963) and Matsumoto (1984); it was recombined as Phylloceras (Neophylloceras) ramosum by Henderson and McNamara (1985) and 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).
It was recombined as Neophylloceras ramosum by Matsumoto (1959) and Henderson (1970); it was recombined as Ammonites (Scaphites) ramosum by Jones (1963) and Matsumoto (1984); it was recombined as Phylloceras (Neophylloceras) ramosum by Henderson and McNamara (1985) and 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).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
Year | Name and author |
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1857 | Ammonites (Scaphites) ramosus Meek |
1958 | Phylloceras vaculae Anderson p. 181 figs. Pl 40, figs 3,3a,3b |
1958 | Phylloceras pachecoense Anderson p. 182 figs. Plate 53, figures 1, 1a |
1958 | Phylloceras pachecoensis Anderson p. 182 figs. Pl 53, figs 1,1a |
1959 | Neophylloceras ramosum Matsumoto p. 1 figs. Pl.1, fig. 1a-d; Pl.2, fig.2; Pl. 8, fig.1a-c |
1963 | Ammonites (Scaphites) ramosum Jones p. 22 |
1970 | Neophylloceras ramosum Henderson |
1984 | Ammonites (Scaphites) ramosum Matsumoto p. 9 |
1985 | Phylloceras (Neophylloceras) ramosum Henderson and McNamara p. 40 figs. Pl 1, figs 1-3; text-fig 3c |
1993 | Phylloceras (Neophylloceras) ramosum Ward and Kennedy p. 15 figs. 17.2, 17.5, 17.6 |
1996 | Hypophylloceras (Neophylloceras) ramosus Wright et al. p. 1 |
2010 | Hypophylloceras (Neophylloceras) ramosum Salazar et al. p. 184 figs. 3, 4a-d,m |
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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.
†Hypophylloceras (Neophylloceras) ramosum Meek 1857
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Invalid names: Phylloceras pachecoense Anderson 1958 [synonym], Phylloceras pachecoensis Anderson 1958 [synonym], Phylloceras vaculae Anderson 1958 [synonym]
Diagnosis
Reference | Diagnosis | |
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T. Matsumoto 1959 | The 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. |