Black Crystalwort vs Comet Darner

Riccia nigrella compared with Anax longipes

Key Differences

• Black Crystalwort is Not Evaluated while Comet Darner is Least Concern.

Taxonomic Classification

Rank	Black Crystalwort	Comet Darner
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Marchantiophyta (liverwort)	Arthropoda (Arthropods)
Class	Marchantiopsida (Marchantiopsida)	Insecta (Insects)
Order	Marchantiales (Marchantiales)	Odonata (Odonata)
Family	Ricciaceae	Aeshnidae
Genus	Riccia	Anax
Species	Riccia nigrella	Anax longipes

Conservation Status

Black Crystalwort

NE — Not Evaluated

Comet Darner

LC — Least Concern

Physical Characteristics

Attribute	Black Crystalwort	Comet Darner
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black Crystalwort

Habitat

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

Range

Distributed across Chile, Japan, New Zealand, Norway, and Portugal.

Comet Darner

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found in United States.

Black Crystalwort

The Black Crystalwort (Riccia nigrella) is a species in the genus Riccia. Native to Asia and Europe and Oceania, inhabiting ecosystems characteristic of the region. Distributed across Chile, Japan, New Zealand, Norway, and Portugal.

Comet Darner

<em>Anax longipes</em>, the comet darner, is a large dragonfly in the family Aeshnidae, assessed as Least Concern on the IUCN Red List. It is endemic to the United States, where it inhabits lakes, ponds, and slow-moving rivers with clear water and abundant emergent vegetation. The comet darner is one of the largest North American dragonflies and is distinguished by its brilliant coloration, including a green thorax and a red-spotted abdomen in mature males. The species name longipes refers to its notably long legs. Adults are powerful aerial predators, feeding on a variety of flying insects captured in flight. Larvae are aquatic and predatory, developing in the benthic zone of freshwater habitats where they feed on invertebrates and small vertebrates. The comet darner undertakes seasonal dispersal movements and is most commonly observed near its breeding water bodies during the warmer months.