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).