Identifying Sponges

Key to California Porifera (Page 207)

( From page 205 B) Sterrasters present.
[A]
Megascleres = Oxeas and Plagiomonaenes ONLY.
NAPATT.jpg
Geodia robusta megasterra Lendenfeld, 1910
Sponge: Massive.
Color: Alive. Dirty white, whitish tan.
Spicules: Megascleres: (1) Oxeas: 2500 um. x 40 - 80 um. (2) Plagiomonaenes: rhabds 2100 um. x 26 - 42 um. Microscleres: (1) Sterrasters: 880 um. x 180 - 237 um. (2) Strongylospherasters: diameter 7 - 130 um. (3) Oxyspherasters to Oxyeuasters: diameter 9 - 38 um.
Skeleton: Ectosome: Cortex of Sterraster armor.
Distribution: Southern California.
Depth: Deep water.
Note: Geodinella robusta megasterra Lendenfeld, 1910 was also reported by de Laubenfels, 1932 as occurring in California. The Systema reports Geodinella as a junior synonym of Geodia.. The status of California Geodias is not satisfactory and needs intensive review. Lendenfeld reports 5 species from California, including G. agassizii, breviana, ovis, mesotrienella and mesotriaena (pg. 208A) but differences are minimal and suspect. A review is necessary. See. Pg 208 A, de Laubenfels, 1932 and Lendenfeld, 1910. Cited as Geodinella robusta by de Laubenfels.
[B] GO TO PAGE 208
Megascleres may include Oxeas or Plagiomonaenes but have other Tetracts as well.
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