dichotriaenes

Dichotriaenes are a group of sponges belonging to the class Demospongiae, characterized by their siliceous spicules. These spicules, which are the structural elements of the sponge's skeleton, are triaenes that have undergone a specific branching pattern. The term "dichotriaene" refers to a triaene where the rhabdome, the central shaft, bears two radiating actines (rays). This results in a characteristic four-pointed star-like structure when viewed from above.

The classification of dichotriaenes places them within the order Spirophorida, a diverse group of sponges. Within this order, they are found in various families. The morphology of dichotriaenes can vary, with differences in the length and thickness of the actines, as well as the overall size of the spicule. These variations are important for taxonomic identification.

Dichotriaenes are found in a range of marine environments, from shallow coastal waters to deeper oceanic regions, and are distributed globally. Like other sponges, they are sessile filter feeders, drawing water through their bodies to extract organic particles for sustenance. Their spicular skeletons provide support and protection against predators. Research on dichotriaenes often focuses on their spicule morphology, ecological roles, and potential for biochemical discoveries.