Black Crystalwort vs Cliff Mining Bee

Riccia nigrella compared with Andrena thoracica

Key Differences

Black Crystalwort is Not Evaluated while Cliff Mining Bee is Extinct.

Taxonomic Classification

Rank	Black Crystalwort	Cliff Mining Bee
Kingdom	Plantae (植物)	Animalia (动物界)
Phylum	Marchantiophyta (地钱门)	Arthropoda (节肢动物门)
Class	Marchantiopsida (地钱纲)	Insecta (昆蟲綱)
Order	Marchantiales (地钱目)	Hymenoptera (膜翅目)
Family	Ricciaceae	Andrenidae
Genus	Riccia	Andrena
Species	Riccia nigrella	Andrena thoracica

Conservation Status

Black Crystalwort

NE — Not Evaluated

Cliff Mining Bee

EX — Extinct

Physical Characteristics

Attribute	Black Crystalwort	Cliff Mining Bee
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.

Cliff Mining Bee

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Luxembourg, Norway, and Sweden.

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.

Cliff Mining Bee

The Cliff Mining Bee, Andrena species in the family Andrenidae, is a solitary ground-nesting bee that excavates tunnels in cliff faces, earthen banks, and compacted sandy or loamy soils, where the loose or friable substrates exposed in cliff profiles provide ideal nesting conditions. Mining bees in the genus Andrena are among the most species-rich solitary bee genera in the world, with hundreds of species across the Holarctic region, many narrowly specialized in their choice of pollen host plants. Female cliff mining bees construct vertical or angled burrows in cliff faces, with lateral cells off the main shaft, each containing a pollen ball and a single egg. Males are typically smaller and emerge before females to establish territories near nesting sites. Many Andrena species are oligolectic, collecting pollen from only a small number of plant species, making their populations sensitive to the availability of specific flowering plants in the landscape surrounding nesting areas. Cliff and bank nesting habitats provide well-drained, sun-warmed substrates essential for brood development. The loss of natural cliff faces and earthen banks to development, vegetation succession, and quarrying reduces available nesting habitat for cliff mining bees.