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Phylogeny

Phylogeny

Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.

Bacterial Phylum Firmicutes

Bacterial Phylum Firmicutes

Firmicutes is a diverse phylum of Gram-positive bacteria characterized by a low GC content in their genomes. This phylum includes organisms with monoderm or diderm cell envelopes, highlighting a complex evolutionary history. Firmicutes comprises several major orders, including Lactobacillales, Clostridiales, and Bacillales, which exhibit remarkable diversity in their morphology, metabolism, and ecological roles.The order Lactobacillales includes lactic acid bacteria, which are fermentative...

Phylogenetic Trees

Phylogenetic Trees

Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.

Bacterial Phylum Planctomycetes

Bacterial Phylum Planctomycetes

Planctomycetes are a group of morphologically distinct bacteria predominantly classified into two orders: Planctomycetales and Brocadiales. These gram-negative bacteria exhibit unique features, including division by budding and the presence of stalks or appendages. Their cells are often found in rosette arrangements, and they are notable for possessing an S-layer in their cell envelope, which is relatively uncommon among bacteria. Additionally, Planctomycetes frequently exhibit intracellular...

Bacterial Phylum Tenericutes

Bacterial Phylum Tenericutes

The phylum Tenericutes, which includes the single class Mollicutes, comprises bacteria that lack cell walls. The term "Mollicutes" derives from the Latin word mollis, meaning "soft." These organisms are among the smallest known and are commonly referred to as mycoplasmas due to the prominence of the genus Mycoplasma, which includes well-known human pathogens. Despite their inability to stain gram-positively (a result of their lack of cell walls), mycoplasmas are phylogenetically related to the...

Taxonomy

Taxonomy

Taxonomy is the science of defining and naming groups of biological organisms based on shared characteristics. It uses a hierarchy of increasingly inclusive categories with Latin names. The smallest units of taxonomy, species and genus, are used to assign a formal, taxonomic name to each species in a system. This classification system, referred to as binomial nomenclature, was formalized by Carolus Linnaeus in the 18th century.
Hierarchy of Taxonomy
The hierarchy that Carolus Linnaeus first...

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Related Experiment Video

Updated: Mar 18, 2026

Author Spotlight: Exploring Bradysia coprophila's Unique Biology – A Guide to Laboratory Maintenance

Author Spotlight: Exploring Bradysia coprophila's Unique Biology – A Guide to Laboratory Maintenance

Published on: April 19, 2024

FAMILY PIOPHILIDAE.

Marta Wolff¹, Sandra Pérez², Diana Grisales³

¹Grupo de Entomologia, Instituto de Biologia, Universidad de Antioquia, Medellín-Colombia.;

|July 11, 2016

Summary

This study expands the known distribution of Piophilidae flies in Colombia. Two species, Piophila casei and Stearibia nigriceps, are now reported from additional localities nationwide.

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Area of Science:

Entomology
Biodiversity Studies
Zoology

Background:

The Piophilidae family is poorly documented in Colombia.
Previous records only included two species: Piophila casei and Stearibia nigriceps.

Purpose of the Study:

To catalogue and expand the known distribution of Piophilidae species within Colombia.
To provide updated information on the geographic range of Piophilidae in the country.

Main Methods:

Field surveys and specimen collection across various Colombian localities.
Taxonomic identification of collected Piophilidae specimens.
Geographic data compilation and mapping.

Main Results:

Expansion of distribution records for Piophilidae in Colombia.
Confirmation of Piophila casei presence in new regions.
Confirmation of Stearibia nigriceps presence in new regions.

Conclusions:

The distribution of Piophilidae in Colombia is more extensive than previously known.
This catalogue serves as a foundational update for Colombian Piophilidae research.
Further research is needed to fully understand Piophilidae diversity in Colombia.