Show simple item record

dc.contributor.authorChurch, Stephen B.
dc.date.accessioned2017-08-09T20:34:00Z
dc.date.available2017-08-09T20:34:00Z
dc.date.issued2017-08-09
dc.identifier.urihttp://hdl.handle.net/1808/24771
dc.description.abstractLithistid orchoclad sponges within the family Anthaspidellidae Ulrich in Miller, 1889 include several genera that added ornate features to their outer-wall surfaces during Early Ordovician sponge radiation. Ornamented anthaspidellid sponges commonly constructed annulated or irregularly to regularly spaced transverse ridge-and-trough features on their outer-wall surfaces without proportionately increasing the size of their internal wall or gastral surfaces. This efficient technique of modifying only the sponge’s outer surface without enlarging its entire skeletal frame conserved the sponge’s constructional energy while increasing outer-wall surface-to-fluid exposure for greater intake of nutrient bearing currents. Sponges with widely spaced ridge-and-trough ornament dimensions predominated in high-energy settings. Widely spaced ridges and troughs may have given the sponge hydrodynamic benefits in high wave force settings. Ornamented sponges with narrowly spaced ridge-and-trough dimensions are found in high energy paleoenvironments but also occupied moderate to low-energy settings, where their surface-to-fluid exposure per unit area exceeded that of sponges with widely spaced surface ornamentations.en_US
dc.publisherPaleontological Instituteen_US
dc.relation.ispartofseriesPaleontological Contributions;18
dc.subjectlithistid spongesen_US
dc.subjectOrdovician radiationen_US
dc.subjectmorphological variationen_US
dc.subjecttheoretical morphologyen_US
dc.titleEfficient Ornamentation in Ordovician Anthaspidellid Spongesen_US
dc.typeArticleen_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record