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  1. World Porifera Database - Species - Callyspongia diffusa (Ridley, …

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    Some calcified demosponges grow by only 0.2 mm (0.0079 in) per year and, if that rate is constant, specimens 1 m (3.3 ft) wide must be about 5,000 years old. Some sponges start sexual reproduction when only a few weeks old, while others wait until they are several years old.
    en.wikipedia.org
    The phylum Porifera is further divided into classes mainly according to the composition of their skeletons: Hexactinellida (glass sponges) have silicate spicules, the largest of which have six rays and may be individual or fused.
    en.wikipedia.org
    Made of calcite if present. Nevadacoelia wistae, a fossil anthaspidellid demosponge from the early Ordovician of Nevada. Although molecular clocks and biomarkers suggest sponges existed well before the Cambrian explosion of life, silica spicules like those of demosponges are absent from the fossil record until the Cambrian.
    en.wikipedia.org
    "Pleisticanthoides Yokoya, 1933, a valid genus of deep-sea inachid spider crabs (Crustacea: Decapoda: Brachyura: Majoidea), with descriptions of two new species from the Philippines, Papua New Guinea and Vanuatu". Zootaxa. 3551 (1): 65–81. doi: 10.11646/zootaxa.3551.1.5.
  3. Foraminifera - The World Foraminifera Database - WoRMS

  4. World Porifera Database - Species - Callyspongia (Callyspongia) …

  5. Sponge Guide – A Picture Guide to Caribbean Sponges

  6. Sponge - Wikipedia

  7. Foraminifera - The World Foraminifera Database - WoRMS

  8. Flagellimonas halotolerans sp. nov., a novel bacterium isolated …

  9. Items where Subject is "Biochemistry > Bioactive compounds"

  10. Clipperton Island - Wikipedia

  11. List of organisms named after famous people (born 1800–1899)