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Pseudodiadema hemisphaericum

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description Pseudodiadema hemisphaericum Overview

Pseudodiadema hemisphaericum is an extinct species of regular sea urchin placed in the genus Pseudodiadema and the family Pseudodiadematidae. Like other regular echinoids, it had a broadly radial body plan rather than the bilateral form seen in heart urchins and related irregular groups. The organism is known from fossil material and belongs to a family recorded in Jurassic and Cretaceous rocks.

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What is Pseudodiadema hemisphaericum?

Pseudodiadema hemisphaericum is an extinct species of regular sea urchin. It belongs to the genus Pseudodiadema and the family Pseudodiadematidae.

Was Pseudodiadema hemisphaericum a heart urchin?

No, it was a regular echinoid with a broadly radial body plan. Heart urchins such as Echinocardium have a bilateral, often heart-shaped form instead.

Is Pseudodiadema hemisphaericum still alive today?

No, the species is extinct and is known from the fossil record. Its classification places it among fossil regular sea urchins rather than living coastal species.

What does Pseudodiadema mean in classification?

Pseudodiadema is the genus name used for this fossil sea urchin and related species. The family name is Pseudodiadematidae, which groups the genus with its close relatives.

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