El Hatillo (Miocene of Venezuela)

Also known as Urumaco

Where: Falcon, Venezuela (11.2° N, 70.2° W: paleocoordinates 10.9° N, 68.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Upper Member (Urumaco Formation), Late/Upper Miocene (11.6 - 5.3 Ma)

• The geological units from which the specimens were obtained are the middle and upper members of the Urumaco Formation of Venezuela. These units have been recently summarized in the Léxico estratigráfico de Venezuela (1997).

• member-level stratigraphic resolution

Environment/lithology: fluvial-deltaic; brown, gray claystone and sandstone

• The paleoenvironments are interpreted as inner sub-littoral and coastal lagoon enviroments with riverine and estuarine influence (Díaz de Gamero, 1996).

Size class: macrofossils

Collected by MCZ (B. Patterson), UCV (J. Royo-Gomez), UNEFM (O. Aguilera), UFAC (J. Bocquetin-Villanueva) and AMU (R. Sanchez) in 1958-2003

Primary reference: J. G. Lundberg and O. A. Aguilera. 2003. The late Miocene Phractocephalus catfish (Siluriformes: Pimelodidae) from Urumaco, Venezuela: additional specimens and reinterpretation as a distinct species. Neotropical Ichthyology 1(2):97-109 [C. Jaramillo/G. Ballen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 136777: authorized by Carlos Jaramillo, entered by Gustavo Ballen on 04.12.2012, edited by Philip Mannion and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

 Siluriformes - Pimelodidae
Phractocephalus nassi Lundberg and Aguilera 2003 cajaro
UNEFM-PF-0158 (paratype)
 Testudines - Panchelidae
"Chelus lewisi" = Chelus colombianus5
"Chelus lewisi" = Chelus colombianus5 Wood 1976 Chelus colombiana
UNEFM 1371, complete shell badly crushed, and UNEFM 1415, anterior half of plastron
 Crocodylia - Crocodylidae
Charactosuchus mendesi3 crocodile
AMU-CURS unnumbered (partial cranial remains)
 Crocodylia - Alligatoridae
Purussaurus mirandai n. sp.1 Aguilera et al. 2006 crocodilian
UNEFM-CIAAP-1369 - type (a complete skull with associated mandibles, femur and ischium); paratypes: AMU-CURS-135 (a skull with associated mandibles) and UNEFM-CIAAP-1445 (right mandible); referred material: UNEFM-CIAAP-1363 (pubis), UNEFM-CIAAP-1367 (scapula, coracoid and ilium) and UNEFM-CIAAP-1370 (humerus)
Mourasuchus sp.4 Price 1964 crocodilian
AMU-CURS unnumbered (partial cranial remains)
Globidentosuchus cf. brachyrostris4 Scheyer et al. 2013 crocodilian
Melanosuchus sp.2 Gray 1862 black caiman
AMU-CURS-234 (cranium and mandibles; also postcranium)
 Crocodylia -
Gryposuchus croizati3 Riff and Aguilera 2008 crocodilian
AMU-CURS-134 (cranium with associated mandibles)