Rio Gualo (5th cycle) (Triassic of Argentina)

Where: La Rioja, Argentina (29.9° S, 67.8° W: paleocoordinates 46.5° S, 33.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Los Rastros Formation (Agua de la Peña Group), Carnian (237.0 - 228.0 Ma)

• Carnian age based on radiometric constraints from underlying Chañares Formation in Marsicano et al. (2015).

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified, black, carbonaceous claystone

• "The features observed in the facies assemblage A suggest that it was deposited in a deep off-shore lacustrine depositional environment. The claystones were deposited by suspension in distal-lake conditions…" Mancuso et al., 2007

•Ichigualasto–Villa Unión Basin, developed along the western Gondwana margin associated with extension focused along the northwest-trending Paleozoic sutures. This extension originated from the breakup of Pangaea during the end of Permian and start of the Triassic. Synrift phase II - accommodation space generated by tectonic subsidence.

• "This facies assemblage is dominated by dark gray to black carbonaceous claystones (Fl) interbedded with iron mudstones and very fine-grained sandstones (SFm) (figures 3, 4). The tabular beds form a laterally persistent succession with thickness that ranges from 2 to 5 m. The claystones are horizontally laminated, and formed by continuous microlamination with different grain sizes."

Size classes: macrofossils, mesofossils

• beetle specimens consist of 90% isolated elytra

Preservation: mold/impression

Collection methods: quarrying,

• Specimens kept in PULR-I – Invertebrate Paleontological Collection, Universidad Nacional de La Rioja, Argentina

Primary reference: R. G. Martins-Neto and O. F. Gallego. 1999. The Triassic insect fauna from Argentina. I. Auchenorrhyncha, Miomoptera and Ensifera. Revista Española de Paleontología 14:191-202 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 122987: authorized by Matthew Clapham, entered by Jered Karr on 08.01.2012, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hemiptera - Scytinopteridae
Australocicada arcucciae n. sp.1 Martins-Neto and Gallego 2001 true bug
PULR-I 256; 266 in Martins-Neto et al., 2003
 Hemiptera - Dysmorphoptilidae
"Dysmorphoptiloides pulcherrima n. sp." = Gallegomorphoptila pulcherrima3, "Dysmorphoptiloides acostai" = Gallegomorphoptila acostai1, Gallegomorphoptila breviptera n. gen. n. sp.3, "Dysmorphoptiloides gigantea n. sp." = Gallegomorphoptila gigantea1
"Dysmorphoptiloides pulcherrima n. sp." = Gallegomorphoptila pulcherrima3 Martins-Neto and Gallego 2003 true bug
PULR-I 261
"Dysmorphoptiloides acostai" = Gallegomorphoptila acostai1 Martins-Neto and Gallego 1999 true bug
PULR-I-254
Gallegomorphoptila breviptera n. gen. n. sp.3 Martins-Neto and Gallego 2003 true bug
PULR-I 265
"Dysmorphoptiloides gigantea n. sp." = Gallegomorphoptila gigantea1 Martins-Neto and Gallego 2001 true bug
PULR-I 255
 Hemiptera - Progonocimicidae
Yurigocimex popovi n. gen. n. sp.3, Popovigocimex yurii n. gen. n. sp.3
Yurigocimex popovi n. gen. n. sp.3 Martins-Neto and Gallego 2003 true bug
PULR-I 262
Popovigocimex yurii n. gen. n. sp.3 Martins-Neto and Gallego 2003 true bug
PULR-I 271
 Blattaria - Caloblattinidae
Samaroblatta sp.4 Tillyard 1919 cockroach
PZCTES 7292d-f, PULR-I 296, 286a
Samaroblatta gualoensis n. sp.4 Martins-Neto and Gallego 2005 cockroach
PULR-I 279, 280, 281
Samaroblatta corrientesina n. sp.4 Martins-Neto and Gallego 2005 cockroach
PULR-I 282, 287, PZ-CTES 7296
 Plecoptera - Euxenoperlidae
Argentinoperlidium rogersi n. gen. n. sp.3 Martins-Neto and Gallego 2003 stonefly
PULR-I 258
 Blattodea - Mancusoblattidae
Hermosablatta pectinata n. gen. n. sp.4 Martins-Neto and Gallego 2005 cockroach
PULR-I 284, 291, 276
Hermosablatta crassatella n. sp.4 Martins-Neto and Gallego 2005 cockroach
PULR-I 289, 277(PZ-CTES 7274), PZ-CTES 7277
Mancusoblatta pulchella n. gen. n. sp.4 Martins-Neto and Gallego 2005 cockroach
PULR-I 288
 Blattodea - Argentinoblattidae
Argentinoblatta sp.4 Martins-Neto and Gallego 2005 cockroach
PZ-CTES 7292a
Argentinoblatta herbsti n. gen. n. sp.4 Martins-Neto and Gallego 2005 cockroach
PULR-I 220
Condorblatta lutzae n. gen. n. sp.4 Martins-Neto and Gallego 2005 cockroach
PULR-I 285, 264(PZ-CTES 7295)
 Blattodea - Mesoblattinidae
Pulchellablatta nana n. gen. n. sp.4
Pulchellablatta nana n. gen. n. sp.4 Martins-Neto and Gallego 2005 cockroach
PULR-I 274
 Dicondylia - Blattulidae
Argentinoblattula revelata n. gen. n. sp.4 Martins-Neto and Gallego 2005 winged insect
PULR-I 286
Argentinoblattula ? revelata4 Martins-Neto and Gallego 2005 winged insect
PULR-I 293, 294, 295
 Dicondylia - Triassoblattidae
Triassoblatta sp.4 Tillyard 1919 winged insect
PZCTES 7292b, 7292g, 7292c, PULR-I 272
 Orthoptera - Haglidae
? Notopamphagopsis "sp. 2"3 Cabrera 1928 hump-winged cricket
PULR-I 259
? Notopamphagopsis "sp. 3"3 Cabrera 1928 hump-winged cricket
PULR-I 270
? Notopamphagopsis "sp. 1" Cabrera 1928 hump-winged cricket
PULR-I 223
 Glosselytrodea - Glosselytridae
Argentinoglosselytrina pulchella n. gen. n. sp.1 Martins-Neto and Gallego 2001 winged insect
PULR-I 253; 263 in Martins-Neto et al., 2003
 Coleoptera - Ademosynidae
Ademosyne elongatus n. sp.2 Martins-Neto and Gallego 2006 beetle
Ademosyne hexacostata n. sp.2 Martins-Neto and Gallego 2006 beetle
PULR-I 308a-e, PULR-I 305
Ademosyne arcucciae2 Martins-Neto and Gallego 2006 beetle
 Coleoptera - Elateridae
Cardiosyne obesa2 Martins-Neto and Gallego 2006 click beetle
PULR-I 325b-e
Cardiosyne elegans n. sp.2 Martins-Neto and Gallego 2006 click beetle
PULR-I 312, 327a-c
 Coleoptera - Schizocoleidae
Argentinosyne gonaldiae2 Martins-Neto and Gallego 2006 beetle
PULR-I 322, CTES-PZ 7305a
Argentinosyne rugosa n. sp.2 Martins-Neto and Gallego 2006 beetle
PULR-I 319
Argentinosyne gualoensis n. sp.2 Martins-Neto and Gallego 2006 beetle
PULR-I 320, PULR-I 311a-d
Argentinosyne losrastrosensis n. sp.2 Martins-Neto and Gallego 2006 beetle
PULR-I 344
Argentinosyne frenguellii n. sp.2 Martins-Neto and Gallego 2006 beetle
PULR-I 227(CTES-PZ 7297)
 Dicondylia -
Frenguelliphlebia labandeirai n. gen. n. sp.3 Martins-Neto and Gallego 2003 winged insect
PULR-I 269