This category is for websites that deal specifically with the fossil record of graptolites, an extinct colonial taxon presumably related to hemichordates.
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- Rhabdopleura kozlowskii Diagnosis, occurrence, images, and references of the species.
- Pterobranchia: Classification of the Rhabdopleuroidea List of extinct and extant families, genera and species.
- Cephalodiscus lutetianus (Graptolithoidea, Cephalodiscoidea) The only fossil species of the genus Cephalodiscus.
- SEM Micrographs of Rhabdopleura compacta. Three coenecia (two very young) from Stock Point, Plymouth.
- Collagen in the Pterobranch Coenecium Results of the amino-acid analysis of the skeleton of Rhabdopleura and Cephalodiscus.
- Graptolites Graptolites collected from the Athens Shale formation (Ordovician age) near Montevalo, Alabama.
- Piotr Mierzejewski: Count of Calmont A free graptolite researcher and a Rosicrucian Frater. Research interests, primarily in sessile graptolites and pterobranchs, and publications.
- Permian Pterobranch First find of a Permian rhabdopleurid (Graptolithoidea).
- Pyritized Graptolites Pyritization and deformation of graptolites by Ch.M. Witkowski.
- Graptolite Net Links to graptolite and pterobranch pages, abstracts, articles, graptolite researchers.
- Cyrtograptus murchinsoni Information about the species; photo.
- Petalograptus minor Photo of the graptolite species.
- Dithecoid Graptolites (Dithecoidea) Remarks on affinities of some graptolite-like fossils.
- Stolonoidea Stolonoid graptolites discussed as rhabdopleurids.
- Graptovermida Definition and nature of the Graptovermida, graptolites incertae sedis.
- Chaunograptus and the Dendroidea Affinities of some alleged graptolite genera.
- Affinities of Inocaulis Nature of the genera assigned to the graptolite order Inocaulida.
- Melanostrophus: An Enigmatic Hemichordate A graptolite-like fossil from the Ordovician of Estonia and erratic boulders.
- Tetragraptus fruticosus - Ordovician Graptolite Material from the Bendigonian Series, Bendigo, Victoria, Australia.
- The Enigmatic Encruster Chaunograptus Graptolite-like fossils from the Upper Ordovician of Ohio and Indiana. By J.M. St.John and M.A. Wilson.
- Mastigograptus: An incertae sedis Graptolite Diagnosis, distribution and images of the genus.
- 100th Anniversary of Oliver Bulman's Birth Biography of an Authority on Graptolites.
- Autothecal Morphs and Dormancy in an Ordovician Sessile Graptolite Description and SEM micrographs of normal and sealed thecal morphs in the camaroid graptolite Xenotheka klinostoma from the Ordovician of Öland, Sweden.
- Graptolites and Early Vascular Land Plants Early Palaeozoic tracheid-like tubes, believed to be of vascular land plant origin, resemble fragments of graptolite stolons.
- Graptolite Stolons Described as Remnants of Hydroids. Isolated stolons of Koremagraptus-like graptolites were misinterpreted as remains of the 'chitinous' hydroids (4 images).
- Cortical Bandages in Orthograptus gracilis. Images (SEM and LM) of the fundamental unit of cortex in graptolites.
- Rhabdopleura-like Fossil from the Silurian of Gotland. An excellently preserved zooidal tube of a Silurian hemichordate closely related to the extant genus Rhabdopleura.
- Graptolites Relationshipis among graptolite orders.
- BSEM: a Tool for Graptolite Research Back-scattered electron microscopy technique applied to study graptolitic material - BSEM image of Psigraptus.
- Rhabdopleura graysoni Chapman, Durman & Rickards The Carboniferous rhabdopleurid graptolite closely resembling the extant species Rhabdopleura compacta Hincks.
- Infrared Video Microscopy for the Study of Isolated Graptolites Description of a new technique for studying chemically isolated graptolites.
- Pyritized Graptolites Radiographs of Rhaphidograptus toernquisti, Monograptus atavus and Pseudoclimacograptus undulatus with explanations of the salient features.
- Classification of the Extant Hemichordata A comprehensive list of extant hemichordate species with images of a few.
- Graptolites Photograph of several specimens of Monograptus colonus, one being magnified, from Silurian deposits at Ludlow, UK.
- Epibionts on Mastigograptus An enigmatic organic-walled fossil twisted around stipes of the sessile graptolite Mastigograptus (Middle Ordovician).