Grammepus Hitchcock, 1858 : A sedimentary variant of the fossil insect trackway Lithographus

• Autorzy: Getty Patrick R. , Ward Matthew , Simon Jack

Identyfikatory

DOI

10.14241/asgp.2021.09

• Języki publikacji: EN

Abstrakty

EN

The ichnogenus Grammepus, which is inferred to have been made by a winged (pterygote) insect, was differentiated from other ichnotaxa because its largest tracks were nearly continuous, forming two furrows. Otherwise, it strongly resembles the ichnogenus Lithographus. Examination of both ichnogenera indicate that the largest tracks in Lithographus can be very close together, that some specimens of Grammepus lack furrow-like tracks, and that the type specimen of the type species Grammepus erismatus has separate tracks in some places, and furrow-like ones in others. Given the lack of a feature that can consistently differentiate Lithographus and Grammepus, the latter is synonymized with the former. Experiments with the modern cricket Acheta domesticus in sediment of different saturation levels indicate that a single pterygote producer could produce both “Grammepus-” and Lithographus-like morphologies, with the former being formed in wet, soft sediment wherein the legs drag, and the latter being formed in firmer, drier sediment wherein the legs do not drag.

Słowa kluczowe

EN

ichnology; arthropod ichnotaxonomy; intergrading trace fossils; morphological variability; sediment saturation

• Wydawca: Polskie Towarzystwo Geologiczne
• Czasopismo: Annales Societatis Geologorum Poloniae
• Rocznik: 2021
• Tom: Vol. 91, No. 2
• Strony: 113--120
• Opis fizyczny: Bibliogr. 45 poz., fot., rys.

Twórcy

autor

Getty Patrick R.

• Department of Geology, Collin College, 2800 E. Spring Creek Parkway, Plano TX 75074, USA

• https://orcid.org/0000-0001-8179-1075

autor

Ward Matthew

• Center for Advanced Studies in Mathematics and Natural Sciences, Collin College, 2800 E. Spring Creek Parkway, Plano TX 75074, USA

• https://orcid.org/0000-0001-8324-4542

autor

Simon Jack

• Center for Advanced Studies in Mathematics and Natural Sciences, Collin College, 2800 E. Spring Creek Parkway, Plano TX 75074, USA

• https://orcid.org/0000-0001-9694-6738

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).