Diplodocinae

{{Short description|Extinct subfamily of dinosaurs}}

{{automatic taxobox

| name = Diplodocines

| fossil_range = Late Jurassic to Early Cretaceous, {{fossil range|155|136.4}}

| image = WLA hmns Diplodocus.jpg

| image_alt = Skeleton of Galeamopus

| image_upright = 1.15

| image_caption = Skeleton of Galeamopus

| taxon = Diplodocinae

| authority = Janensch, 1929

| subdivision_ranks = Genera

| subdivision_ref =

| subdivision =

• {{extinct}}Ardetosaurus
• {{extinct}}Barosaurus
• {{extinct}}Dinheirosaurus
• {{extinct}}Diplodocus
• {{extinct}}Galeamopus
• {{extinct}}Kaatedocus?
• {{extinct}}Leinkupal
• {{extinct}}Supersaurus
• {{extinct}}Tornieria

}}

Diplodocinae is an extinct subfamily of diplodocid sauropods that existed from the Late Jurassic to Early Cretaceous of North America, Europe, Africa and South America, about 161.2 to 136.4 million years ago. Genera within the subfamily include Tornieria, Supersaurus, Leinkupal, Galeamopus, Diplodocus, Barosaurus, and Ardetosaurus.{{Cite journal |last1=van der Linden |first1=Tom |last2=Tschopp |first2=Emanuel |last3=Sookias |first3=Roland |last4=Wallaard |first4=Jonathan |last5=Holwerda |first5=Femke |last6=Schulp |first6=Anne |date=October 2024 |title=A new diplodocine sauropod from the Morrison Formation, Wyoming, USA |journal=Palaeontologia Electronica |volume=27 |issue=3 |doi=10.26879/1380 |doi-access=free |url=https://palaeo-electronica.org/content/2024/5327-new-diplodocine-sauropod}}

Cladogram of the Diplodocidae after Tschopp, Mateus, and Benson (2015).{{Cite journal | doi = 10.7717/peerj.857| title = A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda)| journal = PeerJ| volume = 3| pages = e857| year = 2015| last1 = Tschopp | first1 = E. | last2 = Mateus | first2 = O. V. | last3 = Benson | first3 = R. B. J. | pmid=25870766 | pmc=4393826| doi-access = free}}

{{clade| style=font-size:85%;line-height:85%

|label1=Diplodocidae

|1={{clade

|1=Amphicoelias altus

|2={{clade

|1=Apatosaurinae

|label2=Diplodocinae

|2={{clade

|1=Unnamed species

|2={{clade

|1=Tornieria africana

|2={{clade

|1={{clade

|1=Supersaurus lourinhanensis

|2=Supersaurus vivianae }}

|2={{clade

|1=Leinkupal laticauda

|2={{clade

|1=Galeamopus hayi

|2={{clade

|1={{clade

|1=Diplodocus carnegii

|2=Diplodocus hallorum }}

|2={{clade

|1=Kaatedocus siberi

|2=Barosaurus lentus

}} }} }} }} }} }} }} }} }} }}