Lower Mbr., Santa Rosita Fm., Quebrada de la Vizcacha, Argentina ( of Argentina)

Where: Argentina (23.0° S, 66.0° W: paleocoordinates 45.0° S, 127.7° W)

• local area-level geographic resolution

When: Lower Member (Santa Rosita Formation), Tremadoc (486.5 - 477.7 Ma)

• member-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, gray shale and limestone

• light shale with thin beds of dark gray fossiliferous limestone

Collection methods: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete

Primary reference: J. L. Benedetto. 1977. Una nueva fauna de trilobites Tremadocianos de la Provincia de Jujuy (Sierra de Cajas), Argentina. Ameghiniana 14(1-4):186-214 [A. Miller/P. Novack-Gottshall/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8897: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 02.09.2000, edited by Jocelyn Sessa

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Aquilarella tapiai n. sp.
Aquilarella tapiai n. sp.
4 cranidia
Artiopoda
 Agnostida - Agnostidae
Micragnostus sp.
Micragnostus sp. Howell 1935
 Agnostida -
"Ciceragnostus sp." = Leiagnostus
"Ciceragnostus sp." = Leiagnostus Jaekel 1909
Trilobita
 Phacopida - Pliomeridae
Rossaspis sp.
Rossaspis sp. Harrington 1957 trilobite
 Phacopida - Pharostomatidae
Pharostomina tenuisulcata n. sp.
Pharostomina tenuisulcata n. sp. trilobite
4 cranidia
 Corynexochida - Leiostegiidae
Lloydia sp.
Lloydia sp. Vogdes 1893 trilobite
  - Holocephalinidae
Dasometopus marginatus n. sp.
Dasometopus marginatus n. sp. trilobite
1 cephalon
 Olenida - Olenidae
Angelina aff. hyeronimi, Angelina cf. hyeronimi, Paraplicatolina acantha n. sp., Parabolinella sp., Parabolina sp., ? Protopeltura vizcachensis n. sp.
Angelina aff. hyeronimi Kayser 1876 trilobite
2 cranidia
Angelina cf. hyeronimi Kayser 1876 trilobite
1 nearly complete exoskeleton
Paraplicatolina acantha n. sp. trilobite
5 cranidia
Parabolinella sp. Brögger 1882 trilobite
Parabolina sp. Salter 1849 trilobite
? Protopeltura vizcachensis n. sp. trilobite
Protopeltura ? vizcachensis n. sp.; 6 cranidia
 Ptychopariida - Catillicephalidae
Pemphigaspis perforata n. sp., Buttsia australis n. sp.
Pemphigaspis perforata n. sp. trilobite
1 pygidium
Buttsia australis n. sp. trilobite
4 cranidia
 Ptychopariida - Lonchocephalidae
Pseudotalbotina ovalis n. sp.
Pseudotalbotina ovalis n. sp. trilobite
7 cranidia
 Asaphida - Remopleurididae
Kainella sp.
Kainella sp. Walcott 1925 trilobite
 Asaphida - Ceratopygidae
Onychopyge harringtoni n. sp.
Onychopyge harringtoni n. sp. trilobite
3 cranidia, 3 pygidia
 Asaphida - Asaphidae
Asaphellus convexus n. sp.
Asaphellus convexus n. sp. trilobite
4 cranidia, 2 hypostomes, 2 pygidia, 2 librigena