PBDB Taxon

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

Hipponix dichotomus

Gastropoda - Hipponicidae

Taxonomy

Helcion dichotoma was named by Gabb (1864). It is a 3D body fossil. Its type locality is Texas Flat, which is in a Campanian marginal marine sandstone in the Chico Formation of California.

It was recombined as Hipponix dichotomus by Stewart (1927).

Sister species lacking formal opinion data

H. ainamurensis, H. alticostatus, H. amoldi, H. barbata, H. barbatus, H. ceras, H. comptus, H. conoides, H. consobrinus, H. cornucopiae, H. costata, H. craniodes, H. cranioides, H. dilata, H. elegans, H. flechensis, H. floridana, H. floridanus, H. foliaceous, H. foliaceus, H. gomai, H. grayanus, H. imbricataria, H. inevolutus, H. levinus, H. lium, H. neocomiensis, H. oligocostata, H. ovalis, H. patelloides, H. pilosus, H. pygmaea, H. pygmaeus, H. spirirostris, H. subrufus, H. sulcatus, H. sylvaerupis, H. tampensis, H. tortilis, H. tortillis, H. transversus, H. tuba, H. vagus, H. willcoxii, H. woodi, H. erma, H. foliaceus, H. bistriatus, H. cornucopiae, H. spirirostris, H. badius, H. lissus, H. elegans, H. operculars, H. patelloides, H. revellei, H. phlebsi, H. sulcatus, H. suhatus

Synonymy list

Year	Name and author
1864	Helcion dichotoma Gabb p. 141 figs. PI. 21, Fig. 104
1927	Hipponix dichotomus Stewart pp. 342 - 343 figs. Plate XXIII, fig. 7a

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Gastropoda

Rank	Name	Author
subclass	Caenogastropoda	(Cox 1959)
—	Sorbeoconcha	(Ponder and Lindberg 1997)
—	Hypsogastropoda	(Ponder and Lindberg 1997)
superfamily	Hipponicoidea	Troschel 1861
family	Hipponicidae	Troschel 1861
genus	Hipponix	(Defrance 1819)
species	dichotomus	()

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.

†Hipponix dichotomus Gabb 1864

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Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitec

Locomotion:

facultatively mobilef

Attached:

yesf

Life habit:

epifaunalf

Diet:

grazerf

Diet 2:

suspension feederf

Vision:

limitedc

Created:

2009-09-10 08:00:55

Modified:

2009-09-10 10:00:55

Source: f = family, c = class

References: Kiessling 2004, Hendy et al. 2009

Age range: Late/Upper Campanian or 83.60000 to 72.20000 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Late/Upper Campanian	83.6 - 72.2	USA (California)	Hipponix dichotomus (167697)
Middle Campanian	83.6 - 72.2	USA (California)	Helcion dichotoma (72056) Hipponix dichotomus (185368)