Browsing by Author "Shear, William A."
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Item Centiped legs (Arthropoda, Chilopoda, Scutigeromorpha) from the Silurian and Devonian of Britain and the Devonian of North America. American Museum novitates ; no. 3231(New York, NY : American Museum of Natural History, 1998) Shear, William A.; Jeram, Andrew J.; Selden, Paul."Remains of arthropod legs with a pentagonal cross section and serrate margins, found at three Silurian and Devonian sites (Ludford Lane, Wales; Rhynie, Scotland; and Gilboa, New York, USA), are herein attributed to terrestrial scutigeromorph centipeds. The Silurian and Devonian legs are distinct from each other, from previously described Carboniferous remains, and from modern scutigeromorphs, but the general pattern and many of the details of leg construction in these centipeds seems to have been conserved over a 415 million year history. The legs are attributed to a new scutigeromorph genus, Crussolum, placed in a new monobasic family Crussolidae; fairly complete remains from the Devonian of Gilboa, New York, are assigned to the new species Crussolum crusserratum Shear. The Silurian (Ludford Lane) and Rhynie legs are too poorly known to be given a species epithet, but more than one taxon may be present"--P. [1].Item The chordeumatid millipeds of Chile (Diplopoda, Chordeumatida). American Museum novitates ; ; no. 2912.(New York, N.Y. : American Museum of Natural History, 1988) Shear, William A.Item A cladistic analysis of the opilionid superfamily Ischyropsalidoidea, with descriptions of the new family Ceratolasmatidae, the new genus Acuclavella, and four new species. American Museum novitates ; no. 2844(New York, N.Y. : American Museum of Natural History, 1986) Shear, William A."A cladistic analysis of the opilionid superfamily Ischyropsalidoidea revealed three groups of genera, each probably monophyletic, and recognized here as families. The family Ischyropsalididae Simon is redefined to include only the genus Ischyropsalis, the family Sabaconidae Dresco is expanded to include Sabacon (=Tomicomerus, new synonymy) and Taracus, and the family Ceratolasmatidae is described as new for the genera Ceratolasma, Hesperonemastoma, Crosbycus, and Acuclavella, new genus. Acuclavella consists of four new species from Idaho and Washington: cosmetoides, shoshone, merickeli, and quattuor. Crosbycus dasycnemus (Crosby) is redescribed and illustrated, and new distribution records are given"--P. [1].Item Contributions to arachnid systematics in honor of Willis J. Gertsch, on the occasion of his seventy-fifth birthday. Bulletin of the AMNH ; v. 170, article 1(New York : American Museum of Natural History, 1981) Gertsch, Willis John, 1906-; Kaston, B. J. (Benjamin Julian), 1906-; Valerio, Carlos E.; Platnick, Norman I.; Shadab, Mohammad Umar.; Francke, Oscar F.; Maury, Emilio A.; Stahnke, Herbert L. (Herbert Ludwig), 1902-; Murphy, John A.; Raven, Robert J.; Coyle, Frederick A.; Valerio, Carlos E.; Brignoli, Paolo Marcello.; Roth, Vincent D.; Dondale, Charles D.; Redner, James H.; Kronestedt, Torbjorn.; Lowrie, Donald Charles, 1910-; Carico, James E.; Minch, Edwin W.; Peck, William B.; Reiskind, Jonathan.; Richman, David B.; Cutler, Bruce, 1943-; Galiano, Maria Elena.; Opell, Brent D.; Van Helsdingen, P. J.; Millidge, A. F. (Alfred Frank); Levi, Herbert Walter, 1921-; Shear, William A.; Forster, Raymond R., 1922-Item Devonobiomorpha, a new order of centipeds (Chilopoda) from the Middle Devonian of Gilboa, New York State, USA, and the phylogeny of centiped orders. American Museum novitates ; no. 2927(New York, N.Y. : American Museum of Natural History, 1988) Shear, William A.; Bonamo, P. M. (Patricia M.)Item The first Paleozoic pseudoscorpions (Arachnida, Pseudoscorpionida). American Museum novitates ; no. 3009(New York, N.Y. : American Museum of Natural History, 1991) Schawaller, Wolfgang.; Shear, William A.; Bonamo, P. M. (Patricia M.)Item Marwe coarctata : a remarkable new cyphophthalmid from a limestone cave in Kenya (Arachnida, Opiliones). American Museum novitates ; no. 2830(New York, N.Y. : American Museum of Natural History, 1985) Shear, William A."A newly discovered cyphophthalmid opilionid from a cave in Kenya is the first member of the suborder from East Africa, and exhibits a combination of characters not known from any other species. It cannot be placed at this time in any of the described families of the suborder. The species seems to have affinities with the Sironidae, a Holarctic group. The families Sironidae and Pettalidae are thought to be sister groups making up the superfamily Sironoidea, and the species Marwe coarctata, described here as new, is perhaps the sister group of the two families"--P. [1].Item The milliped family Conotylidae (Diplopoda, Chordeumida) : revision of the genus Taiyutyla, with notes on recently proposed taxa. American Museum novitates ; no. 2600(New York, N.Y. : American Museum of Natural History, 1976) Shear, William A."The milliped family Conotylidae Cook is divided into four subfamilies: Conotylidae Cook, Austrotylinae (new), Lophominae Loomis and Schmitt, and Macromastinae Loomis and Schmitt, the last originally proposed as an independent family. A key to the subfamilies and their included genera is presented. The genus Taiyutyla (Conotylinae) is revised, and nine new species are described: clatsop, benedictae, simplex, trifurca, prefemorata, variata, millicoma, lewisi, and clarki. Conotyla extorris Shear is transferred to Taiyutyla. New observations and illustrations are presented of the gonopods of Macromastus marginandus Loomis and Schmitt; the gonopod appears to have one less articulation than the original authors observed. Troglotyla skamania Causey is transferred to Lophomus (Lophominae). Corypus cochlearis Loomis and Schmitt is transferred from the Conotylinae to the Austrotylinae. Brunsonia complexipes Loomis and Schmitt is synonymized with Conotyla albertana Chamberlin. Three nomina dubia in the Conotylidae (Cookella leibergi (Cook and Collins), Zygotyla phana Chamberlin, and 'Trichopetalum' glomeratum Harger) are discussed. Endopus parvipes Loomis and Schmitt and Orthogmus oculatus Loomis and Schmitt, described in the family Trichopetalidae, were based upon immature conotylids; their status cannot be settled without mature material from the type localities"--P. [1].Item The milliped family Tingupidae (Diplopoda, Chordeumatida, Brannerioidea). American Museum novitates ; no. 2715(New York, N.Y. : American Museum of Natural History, 1981) Shear, William A."The Tingupidae, a family of small, litter and soil-dwelling millipeds, is reviewed and seven new species of Tingupa from western North America are described and illustrated (eldorado, sinuosa, causeyae, auricula, clatskanie, benedictae, and tillamook). The species Buotus carolinus is placed in the Tingupidae; it was described as a polyzoniid. It is suggested that Tingupa utahensis and T. arizonica may be isolated populations of the same species; new records for T. pallida from Arkansas caves are given. The evolutionary relationships and biogeography of the family are briefly discussed"--P. [1].Item New terrestrial arachnids from the Devonian of Gilboa, New York (Arachnida, Trigonotarbida). American Museum novitates ; no. 2901(New York, N.Y. : American Museum of Natural History, 1987) Shear, William A.; Selden, Paul.; Rolfe, W. D. I. (William David Ian), 1936-; Bonamo, Patricia M.; Grierson, James D."Three new genera and seven new species of the arachnid order Trigonotarbida are described based on remarkably well preserved fossils from the late Middle Devonian (Givetian) of Gilboa, New York: Gilboarachne griersoni, Gelasinotarbus reticulatus, G. bonamoae, G. bifidus, G. heptops, G.? fimbriunguis, and Aculeatarbus depressus. A brief review of other known Devonian trigonotarbids is presented, and certain misconceptions about the order are rectified, including the nature of the eyes, chelicerae, claws, and abdominal segmentation. Trigonotarbida is shown by cladistic analysis to be the plesiomorphic sister-group of Araneae + Amblypygi + Uropygi + Schizomida"--P. 2.Item On the Central and East Asian milliped family Diplomaragnidae (Diplopoda, Choredeumatida, Diplomaragnoidea). American Museum novitates ; ; no. 2977.(New York, N.Y. : American Museum of Natural History, 1990) Shear, William A.Item The opilionid subfamily Ortholasmatinae (Opiliones, Troguloidea, Nemastomatidae). American Museum novitates ; no. 2757(New York, N.Y. : American Museum of Natural History, 1983) Shear, William A.; Gruber, Jürgen."Three new opilionid species from North America are described: Ortholasma levipes, O. setulipes, and Dendrolasma dentipalpe. The genera Trilasma and Ruaxphilos are synonymized with Ortholasma; the synonymy of Cladolasma with Dendrolasma is confirmed. The new subfamily Ortholasmatinae is established for Ortholasma and Dendrolasma, under the family Nemastomatidae; previously these genera had been considered members of the Trogulidae. Extensive descriptions and illustrations are provided of the morphology of members of the subfamily, together with information on postembryonic development, biogeography, and ecology. A cladistic analysis of the known species is presented"--P. 2.Item A review of the Cyphophthalmi of the United States and Mexico, with a proposed reclassification of the suborder (Arachnida, Opiliones). American Museum novitates ; no. 2705(New York, N.Y. : American Museum of Natural History, 1980) Shear, William A."The species of cyphophthalmid opilionids known from the United States and Mexico are surveyed. The genus Neosiro is considered a synonym of Siro; Siro sonoma is described as new. The male genitalia of S. exilis, S. kamiakensis, and S. acaroides are illustrated for the first time, and the male of Neogovea mexasca is newly described. A new scheme of family-level classification is proposed for the suborder worldwide. The family Sironidae Simon is redefined to include the genera Sira, Parasiro, Tranteeva, Odonotosiro, Metasiro, Paramiopsalis, and Suzukielus. Troglosiro is placed here provisionally. The new family Pettalidae is proposed for Pettalus, Purcellia, Parapurcellia, Neopurcellia, Speleosiro, Rakaia, and Chileogovea. The subfamily Stylocellinae Hansen and Sörensen is raised to family rank and redefined to include only the genus Stylocellus. For the genera Ogovea and Huitaca, the new family Ogoveidae is proposed, and for the genera Neogovea, Paragovia, and Metagovea, the new family Neogoveidae. The new arrangement is based upon a cladistic analysis. Arguments against Savory's 1977 proposal to consider the Cyphophthalmi an order of Arachnida separate from Opiliones are presented"--P. [1].Item Taxonomic notes on the armored spiders of the families Tetrablemmidae and Pacullidae. American Museum novitates ; no. 2650(New York, N.Y. : American Museum of Natural History, 1978) Shear, William A.The spider families Tetrablemmidae and Pacullidae are surveyed, and their relationships assessed. At present it is unclear whether the families are closest to the 'dysderoids' or to the 'scytodoids'; much more morphological and taxonomic data are needed on these putative superfamilies of spiders. The following species are described as new: Tetrablemma extorris, Monoblemma browni, M. muchmorei, Matta mckenziei, M. atoma, Ablemma berryi, A. aiyura, A. sedgwicki, Singaporemma singularis, Brignoliella beattyi, B. sarawak, Paculla kraui, P. cameronensis, and P. negara. Singaporemma is established as a new genus based on S. singularis, and Fallablemma as a new genus based on Hexablemma castaneum. The genus Hexablemma Berland is considered a synonym of Tetrablemma. The new name Brignoliella is provided for the preoccupied Polyaspis Simon. Tetrablemmidae is divided into two subfamilies: Tetrablemminae O.P.-Cambridge and Brignoliellinae, new. Diblemma O. Pickard-Cambridge is considered a synonym of Opopaea (Oonopidae), and Gossiblemma yapensis Roewer a synonym of Pseudanapis aloha Forster (Anapidae)"--P. [1].