Related Experiment Video
Updated: Feb 4, 2026

Sampling for Estimating Frankliniella Species Flower Thrips and Orius Species Predators in Field Experiments
Published on: July 17, 2019
On the type species of Geophilus Gistel, 1834 (Coleoptera: Scarabaeidae: Aphodiinae)
Gianluca Nardi1, Giovanni Dellacasa, Marco Dellacasa
1Centro Nazionale per lo Studio e la Conservazione della Biodiversità Forestale "Bosco Fontana" Carabinieri, Strada Mantova, 29, I-46045 Marmirolo (MN), Italy.. l_nardi@hotmail.com.
Abstract:
Geophilus Gistel, 1834 (Insecta: Coleoptera: Scarabaeidae: Aphodiinae) is invalid being a junior homonym of Geophilus Leach, 1814 (Myriapoda: Chilopoda: Geophilomorpha: Geophilidae) and of Geophilus Schönherr, 1823 (Insecta: Coleoptera: Curculionidae). Scarabaeus asper Fabricius, 1775 was recently designated as type species of Geophilus Gistel, 1834, making Geophilus a junior synonym of Psammodius Fallén, 1807 (Insecta: Coleoptera: Scarabaeidae: Aphodiinae: Psammodiini: Psammodiina). However, there is clear evidence that Scarabaeus asper Fabricius, 1775 sensu Gistel, 1834 is Ptinus germanus Linnaeus, 1767, currently Rhyssemus germanus (Linnaeus, 1767) (Insecta: Coleoptera: Scarabaeidae: Aphodiinae: Psammodiini: Rhyssemina). To resolve this issue, the type species of Geophilus Gistel, 1834 is here fixed (under Article 70.3.2 of the International Code of Zoological Nomenclature) as Ptinus germanus Linnaeus, 1767, misidentified as Scarabaeus asper Fabricius, 1775 in the original paper. Scarabaeus asper Fabricius, 1775 sensu Mulsant, 1842 (= Ptinus germanus Linnaeus, 1767) is the type species of Rhyssemus Mulsant, 1842, therefore Rhyssemus Mulsant, 1842 is a junior synonym of Geophilus Gistel, 1834 (new synonymy). Although it has priority, Geophilus Gistel, 1834 is a junior homonym and therefore invalid, so Rhyssemus Mulsant, 1842 remains the valid name of this taxon.
Related Concept Videos
What is a Species?
Keystone Species
Formation of Species
Types of Genetic Transfer Between Organisms
Multi-species Conserved Sequences
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...

