Amazon Darner vs

Anax amazili compared with Cocconeis placentula

Key Differences

• Amazon Darner is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Amazon Darner
Kingdom	Animalia (동물)	Chromista (크로미스타)
Phylum	Arthropoda (절지동물)	Ochrophyta (대롱편모조식물)
Class	Insecta (곤충)	Bacillariophyceae (원시배선규조류)
Order	Odonata (잠자리)	Achnanthales (Achnanthales)
Family	Aeshnidae	Cocconeidaceae
Genus	Anax	Cocconeis
Species	Anax amazili	Cocconeis placentula

Conservation Status

Amazon Darner

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

Attribute	Amazon Darner
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Amazon Darner

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found in Colombia.

Habitat

Native to Asia and Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Norway, Portugal, Sweden, and Taiwan.

Amazon Darner

The Amazon Darner (Anax amazili) is a species in the genus Anax. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

Cocconeis placentula is among the most ubiquitous and widely studied freshwater and brackish-water diatoms worldwide, serving as a model organism for periphyton ecology and a key species in biological assessment of water quality. A member of the family Cocconeidaceae, this adnate epiphyte produces a characteristic ovoid frustule with fine transapical striae, a well-developed raphe system on one valve, and an elaborate pattern of areolae visible under electron microscopy. The species complex encompasses several morphological varieties (var. placentula, var. lineata, var. euglypta, var. acuta) that differ in fine structural details of the valve ornamentation. Cocconeis placentula colonizes the surfaces of aquatic plants, algae, rocks, and sediment particles in rivers, lakes, and ponds across a vast global range spanning Europe, the Americas, Asia, Africa, and beyond, tolerating a wide range of water temperatures, pH values, and moderate nutrient enrichment. Its abundance varies dramatically with substrate type, light availability, and water chemistry, making community composition data involving this species valuable in diatom-based paleolimnological reconstructions and modern bioassessment indices. As a benthic primary producer, C. placentula contributes substantially to the productivity of the photic benthos and serves as a dietary component for invertebrate grazers. Its remarkable cosmopolitan distribution and ecological flexibility make it one of the defining species of freshwater periphyton communities globally. Conservation status is not formally assessed.