Sponges: Characters, Classification and Types | Zoology
Approximately 10,000 species of sponges are known at present, and the phylum is divided into three classes, viz., Calcarea or Calcispongiae, Hexactinellida or Hyalospongiae, and Demospongiae and about twelve orders chiefly on the type of skeleton.
Sponge - Wikipedia
Sponges are multicellular organisms consisting of jelly-like mesohyl sandwiched between two thin layers of cells, and usually have tube-like bodies full of pores and channels that allow water to circulate through them.
Sponge - Porifera, Demospongiae, & Calcarea | Britannica
Dec 20, 2024 · The classification below, which refers to the three classes of living sponges, is adapted from that of E. Topsent as modified by C. Levi on the basis of embryological data; it is accepted by most experts in the field.
Phylum Porifera- Characteristics, classification, examples
Aug 3, 2023 · The phylum includes about 5,000 species of sponges, grouped into 3 classes depending mainly upon the types of skeleton found in them. The classification here is based on Storer and Usinger (1971) which appears to be a modification from Hyman’s classification .
28.1A: Phylum Porifera - Biology LibreTexts
Nov 23, 2024 · Sponges are classified within four classes: calcareous sponges (Calcarea), glass sponges (Hexactinellida), demosponges (Demospongiae), and the recently-recognized, encrusting sponges (Homoscleromorpha).
Sea Sponges or Porifera - Definition, Types, Reproduction, and …
2 days ago · Sponges are divided into three main classes, each with distinct skeletal compositions and structures that reflect their evolutionary adaptations to different marine environments.Let us take a closer look at each one: Class Calcarea. Represents the smallest sponges, rarely growing beyond 15 centimetres (6 inches).These sponges build their skeletons from calcium carbonate spicules and are most ...
5.1: Phylum Porifera - Biology LibreTexts
Aug 24, 2022 · There are 4 different classes of sponges; Calcarea (calcareous- has spicules*), Hexactinellida (horn sponges), Demospongiae (coralline), and Sclerospongiae (glass sponges). Each class of sponge is composed of different organic materials. If you want to learn more about sponges and their structure, this is a really informative article about them!
3 Main Classes of Phylum Porifera - Biology Discussion
The examples are Spongia, Euspongia (Bath sponge), Hippospongia (Horse sponge), Phyllospongia (Leaf-shaped sponge). Hartman and Goreau (1970) created a 4 th class Sclerospongiae for some coralline sponges collected from caves and tunnels of …
Sponges: Characters and Classification | Animal kingdom
Classification of Sponge: Chiefly on the basis of skeleton, phylum Porifera (Sponge) is divided into three classes. Class 1. Calcarea (L. Calcis- lime): The skeleton is of calcareous spicules. Examples: Leucosolenia, Sycon, (Scypha) Grantia. Leucosolenia: It is a simplest colonial sponge consisting of number of horizontal and vertical tubes.
Porifera - 15+ Examples, Species, Characteristics, Difference
Sep 20, 2024 · Examples: Includes sponges like Demospongiae and Calcarea. Class Calcarea: Marine sponges with calcium carbonate spicules. Class Demospongiae: Largest class, includes sponges with siliceous spicules or spongin fibers. Class Hexactinellida: Glass sponges with six-rayed siliceous spicules.