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Plant-insect interactions on dicots and ferns from the Miocene of Argentina

Juan M. Robledo, Esther R. S. Pinheiro, Silvia C. Gnaedinger and Torsten Wappler
Plant-insect interactions on dicots and ferns from the Miocene of Argentina
Palaios (July 2018) 33 (7): 338-352


The study of plant-insect interactions provides valuable information about the ecology of feeding behavior and the relationships between the host plant and the producer insect. Records of feeding traces are relatively rare for the Miocene of South America. Here, new records of plant-insect interactions on dicot leaves and fern fronds from the middle and late Miocene of Argentina are presented. In total, 1204 dicot and fern impressions were analyzed including 384 from the San Jose Formation and 856 from the Palo Pintado Formation. Traces of arthropod herbivory are found on 303 foliar impressions, 288 from the Palo Pintado Formation and just 15 from the San Jose Formation. Forty-four percent of all traces were found on Thelypteris interrupta (Willd.) Iwatsuki 1963 (Thelypteridaceae), followed by Cedrela fissiliformisAnzotegui and Horn 2011 (Meliaceae) (15.1%) and Schinus herbstiiAnzotegui 1998 (Anacardiaceae) (11.3%). Thelypteris interrupta is associated with a low diversity of Damage Types, mainly hole and window feedings, indicating a monospecific relationship with the trace maker. On the other hand, the high abundance and diversity of damage types found on C. fissiliformis and S. herbstii denote that these plants were hosting a more diverse group of arthropods. Likewise, the lower number of traces identified in the San Jose Formation corresponds to the xeric conditions established during the middle Miocene in northwestern Argentina. These conditions changed in the late Miocene, at least in some regions, to a humid climate, promoting an increase in phytophagy that is evidenced by the abundance recorded in the Palo Pintado Formation.

ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 33
Serial Issue: 7
Title: Plant-insect interactions on dicots and ferns from the Miocene of Argentina
Affiliation: Consejo Nacional de Investigaciones Cientificas y Tecnicas, Centro de Ecologia Aplicada del Litoral, Corrientes, Argentina
Pages: 338-352
Published: 201807
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 120
Accession Number: 2018-081733
Categories: General paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 plates, 1 table, sketch map
S27°13'60" - S25°38'60", W68°05'60" - W66°04'00"
Secondary Affiliation: University of Wyoming, USA, United StatesHessisches Landesmuseum Darmstadt, DEU, Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 2018
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