vs Green Sea Turtle

Chrysochromulina pyramidosa compared with Chelonia mydas

Key Differences

is Not Evaluated while Green Sea Turtle is Endangered.

Taxonomic Classification

Rank		Green Sea Turtle
Kingdom	Chromista (Chromista)	Animalia (Animals)
Phylum	Haptophyta (Haptophyta)	Chordata (Chordates)
Class	Prymnesiophyceae (Prymnesiophyceae)	Reptilia (Reptiles)
Order	Prymnesiales (Prymnesiales)	Testudines (Turtles & Tortoises)
Family	Chrysochromulinaceae	Cheloniidae (Sea Turtles)
Genus	Chrysochromulina	Chelonia (Green Sea Turtles)
Species	Chrysochromulina pyramidosa	Chelonia mydas

Conservation Status

NE — Not Evaluated

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute		Green Sea Turtle
Diet	—	Herbivore
Average Lifespan	—	80 years
Average Length	—	1.2 m
Average Weight	—	200.0 kg

Habitat & Geographic Range

Habitat

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

Range

Distributed across Brazil, Norway, and Sweden.

Green Sea Turtle

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 8 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Australia, Brazil, Costa Rica, Indonesia, and Mexico. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Chrysochromulina pyramidosa is a unicellular marine haptophyte microalga in the genus Chrysochromulina, family Chrysochromulinaceae, class Prymnesiophyceae. The species epithet pyramidosa, meaning pyramid-shaped, refers to a pyramidal morphological feature — most likely a scale element or a distinctive cell shape — visible under electron microscopy. Within Chrysochromulina, the three-dimensional geometry of scales is a primary taxonomic character, and pyramid-shaped scales represent one of several distinctive scale forms distributed across the genus. C. pyramidosa has been documented from Norwegian and Swedish coastal marine environments, part of the extensive Scandinavian haptophyte biodiversity documented through systematic surveys of northern Atlantic coastal waters. These environments are characterized by cold, highly productive waters influenced by the North Atlantic Current and seasonal upwelling of nutrient-rich deep water. Chrysochromulina species including C. pyramidosa are common nanoplankton constituents in these systems, particularly during stratified summer conditions when nutrient depletion in surface waters selects for smaller, more efficient phytoplankton cells. Like other genus members, the species is presumed to employ both photosynthesis and potentially phagotrophic nutrition to sustain itself in variable nutritional environments. C. pyramidosa carries a conservation status of Not Evaluated under IUCN criteria. It represents one of the geometrically diverse scale forms documented within Chrysochromulina, contributing to the broader picture of haptophyte morphological evolution and diversity in temperate Atlantic marine systems.