PBDB Taxon

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

Pachyrhachis

Reptilia

Taxonomy

Pachyrhachis was named by Haas (1979). It is not extant. Its type is Pachyrhachis problematicus.

It was assigned to Ophidia by Caldwell and Lee (1997); to Pachyophidae by Lee et al. (1999); to Ophidia by Lee and Scanlon (2002); to Macrostomata by Rieppel et al. (2003); to Alethinophidia by Longrich et al. (2012); and to Ophidia by Lee and Caldwell (1998), Palci et al. (2013).

Species

P. problematicus (syn. Ophiomorphus colberti) (type species)

Synonyms

Ophiomorphus was named by Haas (1980).

It was replaced with Estesius by Wallach (1984); it was synonymized subjectively with Pachyrhachis by Lee and Caldwell (1998).
Estesius was named by Wallach (1984).

It was synonymized subjectively with Pachyrhachis by Lee and Caldwell (1998).

Synonymy list

Year	Name and author
1979	Pachyrhachis Haas
1980	Ophiomorphus Haas p. 190
1984	Estesius Wallach p. 329
1997	Pachyrhachis Caldwell and Lee
1998	Pachyrhachis Lee and Caldwell p. 1524
1999	Pachyrhachis Lee et al.
2002	Pachyrhachis Lee and Scanlon
2003	Pachyrhachis Rieppel et al.
2012	Pachyrhachis Longrich et al.
2013	Pachyrhachis Palci et al. p. 1335

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Eugnathostomata
—	Teleostomi	(Bonaparte 1836)
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda

Rank	Name	Author
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
—	Squamata	()
suborder	Ophidia	(Latreille 1804)
—	Serpentes	(Linnaeus 1758)
infraorder	Alethinophidia
—	Macrostomata
genus	Pachyrhachis

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.

G. †Pachyrhachis Haas 1979

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†Pachyrhachis problematicus Haas 1979

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Invalid names: Ophiomorphus colberti Haas 1980 [synonym]

Invalid names: Estesius Wallach 1984 [synonym], Ophiomorphus Haas 1980 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Body part:

SVLg

Adult length:

1.0 to < 10g

Maximum body mass:

3 kgg

Minimum body mass:

3 kgg

Body mass estimate:

3 kg

Environment:

coastal, marine, brackishg

Locomotion:

actively mobilep

Life habit:

aquaticg

Diet:

piscivoreg

Diet 2:

carnivoreg

Comments:

Body mass estimate based on length-mass relationships for pythonines: Shine R., and M. Fitzgerald. 1996. Large snakes in a mosaic rural landscape: the ecology of carpet pythons Morelia spilota (Serpentes: Pythonidae) in coastal eastern Australia. Biological Conservation, 76:113-122g

Created:

2005-09-09 11:40:43

Modified:

2005-09-09 13:42:55

Source: g = genus, subp = subphylum, p = phylum

References: Kiessling 2004, Haas 1979, Carroll 1988

Age range: Early/Lower Cenomanian or 100.50000 to 93.90000 Ma

Collections: one only

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Cenomanian	100.5 - 93.9	Palestine	P. problematicus, Ophiomorphus colberti (11804)