DPS Ammonite Posted May 7, 2019 Share Posted May 7, 2019 I found part of a sponge from the Pennsylvanian Naco Formation. The sponge is 5 cm in maximum width. The needle like structures average about 0.2 mm in diameter. Are the needle like structures part of a sponge body or part of the roots? Species? A cross section shows the needles radiate from the center. Photos: 1 top 2 bottom 3 cross section 4 detail 1 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
TqB Posted May 7, 2019 Share Posted May 7, 2019 Lovely specimen - I've always understood that sort of thing from the Carboniferous to be a root mass, loosely called "Hyalostelia" as a form genus though it's a real genus too for which you'd need body spicules for an ID. Is @Spongy Joe around at the moment? 3 Tarquin Link to comment Share on other sites More sharing options...
doushantuo Posted May 7, 2019 Share Posted May 7, 2019 I noticed an increased scientific output from Joe the last half year or so. My guess is he's busy with his field work 3 Link to comment Share on other sites More sharing options...
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