Jacarea

Jacarea Temporal range: Paleocene–Present, 66–0  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Yacare caiman, Caiman yacare
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauromorpha
Clade:	Archosauriformes
Order:	Crocodilia
Family:	Alligatoridae
Subfamily:	Caimaninae
Clade:	Jacarea Norell, 1988
Genera
Caiman Melanosuchus † Acresuchus † Centenariosuchus † Necrosuchus † Purussaurus

Jacarea is a clade of caimans within the subfamily Caimaninae. Jacarea was first named by Norell in 1988 to include the extant species within the genera Caiman and Melanosuchus , while excluding the dwarf caiman genus Paleosuchus . ^[1] In 1999, Brochu formally cladistically defined Jacarea as the last common ancestor of Caiman latirosris (Broad-snouted caiman), Caiman crocodilus (Spectacled caiman), Caiman yacare (Yacare caiman), Melanosuchus niger (Black caiman), and all its descendants. ^[1] Molecular DNA phylogenetic studies recover Paleosuchus as outside of Jacarea, although morphological studies are inconsistent. ^[1]

The cladogram below shows the results of the strict consensus phylogenetic analysis of the 2020 Cicade et al. study: ^[2]

Caimaninae

† Culebrasuchus mesoamericanus † Gnatusuchus pebasensis † Globidentosuchus brachyrostris † Eocaiman palaeocenicus † Eocaiman itaboraiensis † Eocaiman cavernensis † Kuttanacaiman iquitosensis † Bottosaurus harlani † Tsoabichi greenriverensis Paleosuchus trigonatus Smooth-fronted caiman Paleosuchus palpebrosus Cuvier's dwarf caiman † Caiman gasparinae † Mourasuchus amazonensis † Mourasuchus pattersoni † Mourasuchus atopus † Mourasuchus arendsi Jacarea † Necrosuchus ionensis †UCMP 39978 † Caiman wannlangstoni † Centenariosuchus gilmorei † Caiman brevirostris Melanosuchus niger Black caiman Caiman latirostris Broad-snouted caiman Caiman yacare Yacare caiman Caiman crocodilus Spectacled caiman † Acresuchus pachytemporalis † Purussaurus neivensis † Purussaurus mirandai † Purussaurus brasiliensis

References

1. Rio, Jonathan P.; Mannion, Philip D. (6 September 2021). "Phylogenetic analysis of a new morphological dataset elucidates the evolutionary history of Crocodylia and resolves the long-standing gharial problem". PeerJ . 9: e12094. doi: 10.7717/peerj.12094 . PMC   8428266 . PMID   34567843.
2. Cicade, G.M.; Fortier, D.; Hsiou, A.S. (2020). "Taxonomic and phylogenetic review of Necrosuchus ionensis (Alligatoroidea: Caimaninae) and the early evolution and radiation of caimanines". Zoological Journal of the Linnean Society . 189 (2): 657–669. doi: 10.1093/zoolinnean/zlz051 .