Echkar Formation

{{Infobox Rockunit

| name = Echkar Formation

| image =

| caption =

| type = Geological formation

| age = Late Albian-Cenomanian
~{{fossil range|100|95}}

| period = Cenomanian

| prilithology = Sandstone

| otherlithology = Claystone

| namedfor = Echkar, Aderbissinat

| namedby =

| region = Agadez Region

| country = Niger

| coordinates = {{coord|17.9|N|5.6|E|display=inline,title}}

| paleocoordinates = {{coord|2.8|N|0.4|E|display=inline}}

| unitof = Tegama Group

| subunits =

| underlies = Farak Formation

| overlies = Elrhaz Formation

| thickness =

| extent = Iullemmeden Basin

| area =

| map = {{Location map+ | Niger

| relief = 1

| width = 250

| float = center

| places =

{{Location map~ | Niger

| lat_deg = 17.9

| lon_deg = 5.6

| mark = Green pog.svg

| marksize = 12

}}

| map_caption =

}}

The Echkar Formation is a geological formation comprising sandstones and claystones in the Agadez Region of Niger, central Africa.

Description

Its strata date back to the Late Albian to Late Cretaceous (Cenomanian stages, about 100-95 million years ago). Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Africa)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 571-573. {{ISBN|0-520-24209-2}}.

Fossil content

[https://paleobiodb.org/classic/displayCollResults?collection_no=25221 In Abangarit-Tamesna] at Fossilworks.org

= Vertebrates =

= Fish =

colspan="5" align="center" \| Fish of the Echkar Formation
class="wikitable" align="center"
Genus	Species	Material	Notes	Images
Ceratodus \|C. sp. \| \| \|File:Ceratodus.jpg
Lepidotes \|L. sp. \| \| \|File:2015 museum Le Havre Lepidotes.jpg
Onchopristis \|O. numida \| \| \|frameless
Platyspondylus \|P. foureaui \| \| \|

= Dinosaurs =

== Ornithischians ==

class="wikitable" align="center"
colspan="5" align="center" \| Ornithischians of the Echkar Formation
Genus	Species	Material	Notes	Images
?Stegosauria indet. \| \| \|No genus given. May not actually belong to Stegosauria. \|

class="wikitable" align="center"

colspan="5" align="center" | Ornithischians of the Echkar Formation

Genus

Species

Material

Notes

Images

?Stegosauria indet.

|

|No genus given. May not actually belong to Stegosauria.

|

== Sauropods ==

colspan="5" align="center" \| Sauropods of the Echkar Formation
class="wikitable" align="center"
Genus	Species	Material	Notes	Images
Aegyptosaurus \|A. baharijensis \| \| \|File:Aegyptosaurus LM.png
Rebbachisaurus \|R. tamesnensis R. sp.{{citation needed\|date=February 2023}} \| \| \|frameless

== Theropods ==

colspan="5" align="center" \| Theropods of the Echkar Formation
class="wikitable" align="center"
Genus	Species	Material	Notes	Images
Bahariasaurus \|B. ingens \| \| \|frameless
CarcharodontosaurusBrusatte, S. and Sereno, P.C. (2005). "A new species of Carcharodontosaurus (Dinosauria: Theropoda) from the Cenomanian of Niger and its implications for allosauroid phylogeny." Journal of Vertebrate Paleontology, 25: 40A. \| C. iguidensisBrusatte, S.L. and Sereno, P.C. (2007). "A new species of Carcharodontosaurus (dinosauria: theropoda) from the Cenomanian of Niger and a revision of the genus." Journal of Vertebrate Paleontology, 27(4) \| \| \| File:Carcharodontosaurus.png
Elaphrosaurus \|E. iguidiensis (=Theropoda indet.) \| \|Likely an indeterminate theropod. \|frameless
Inosaurus \|I. tedreftensis \| \| \|
Rugops \| R. primus \| \| \| File:Rugops (cropped).png
Spinosaurus \| S. sp. \| Teeth \| \| File:Spinosaurus aegyptiacus.png

= Reptiles =

colspan="5" align="center" \| Reptiles of the Echkar Formation
class="wikitable" align="center"
Genus	Species	Material	Notes	Images
Araripesuchus \| A. rattoides \| \| \| File:Araripesuchus patagonicus SEND.jpg
Elosuchus \|E. sp. \| \| \|frameless
Fortignathus \|F. felixi \| \| \|
Kaprosuchus \| K. saharicus \| \| \| File:Kaprosuchus NT.jpg
Laganosuchus \| L. thaumastos \| \| \| File:Laganosuchus thaumastos.jpg
Testudines indet. \| \| \|No genus given. \|

References

= Bibliography =

{{citation |last=Young |first=Mark T. |last2=Hastings |first2=Alexander K. |last3=Allain |first3=Ronan |last4=Smith |first4=Thomas J.

|year=2017 |title=Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower–Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae |journal=Zoological Journal of the Linnean Society |volume=179 |pages=377–403 }}

colspan="5" align="center" \| Theropods of the Echkar Formation
class="wikitable" align="center"
Genus	Species	Material	Notes	Images
Bahariasaurus \|B. ingens \| \| \|frameless
CarcharodontosaurusBrusatte, S. and Sereno, P.C. (2005). "A new species of Carcharodontosaurus (Dinosauria: Theropoda) from the Cenomanian of Niger and its implications for allosauroid phylogeny." Journal of Vertebrate Paleontology, 25: 40A. \| C. iguidensisBrusatte, S.L. and Sereno, P.C. (2007). "A new species of Carcharodontosaurus (dinosauria: theropoda) from the Cenomanian of Niger and a revision of the genus." Journal of Vertebrate Paleontology, 27(4) \| \| \| File:Carcharodontosaurus.png
Elaphrosaurus \|E. iguidiensis (=Theropoda indet.) \| \|Likely an indeterminate theropod. \|frameless
Inosaurus \|I. tedreftensis \| \| \|
Rugops \| R. primus \| \| \| File:Rugops (cropped).png
Spinosaurus \| S. sp. \| Teeth \| \| File:Spinosaurus aegyptiacus.png

colspan="5" align="center" \| Reptiles of the Echkar Formation
class="wikitable" align="center"
Genus	Species	Material	Notes	Images
Araripesuchus \| A. rattoides \| \| \| File:Araripesuchus patagonicus SEND.jpg
Elosuchus \|E. sp. \| \| \|frameless
Fortignathus \|F. felixi \| \| \|
Kaprosuchus \| K. saharicus \| \| \| File:Kaprosuchus NT.jpg
Laganosuchus \| L. thaumastos \| \| \| File:Laganosuchus thaumastos.jpg
Testudines indet. \| \| \|No genus given. \|