New species of Mentzelia (Loasaceae) from Grand County, Utah

A new species, Mentzelia (Section Bartonia ) shultziorum , of the Loasaceae (Mentzelioideae) is described. A close relationship with M. multicaulis (Osterh.) Darl. and M. argillosa Darl. is suggested based on the morphology of the flowers, leaves, and seeds.     

New species of Mentzelia (Loasaceae) and Phacelia (Hydrophyllaceae) from New Mexico

New species of Mentzelia and Phacelia are described from northwestern New Mexico, USA, as Mentzelia todiltoensis , N. Duane Atwood & Stanley L. Welsh, and Phacelia sivinskii N. D. Atwood, sp. nov. The new Mentzelia is compared to M. humilis based on similarities in seed, fruit, leaf, and flower morphology and to M. memorabalis in stem, leaf, and fruit morphology. Phacelia sivinskii is compared to P. constancei N. D. Atwood on the basis of seed, leaf, and flower morphology.     

New variety of Mentzelia pumila (Loasaceae) from Utah

Named is Mentzelia pumila (Nutt.) T. &: G. var. lagarosa Thorne var. nov. from Utah.     

New variety of Mentzelia multicaulis (Loasaceae) from the Book Cliffs of Utah

Described is Mentzelia multicaulis (Osterh.) Goodman var. librina Thorne & F. J. Smith.     

New species of Astragalus (Leguminosae) from Mesa County, Colorado

Named and described is Astragalus debequaeus Welsh from Mesa County, Colorado.         

A new species of Penstemon (Scrophulariaceae) from the Uinta Basin of Utah and Colorado

Named as a new species is Penstemon albifluvis J. L. England. The species is known from the Uinta Basin of Utah and Colorado.     

New species of oribatids from western Colorado (Acarina: Cryptostigmata, Suctobelbidae)

A new species of Suctobelba, S. tumulata, and a new genus and species, Parisuctobelba septenia, are described from collections of oribatids taken in coal strip-mining spoil banks near Hayden, Colorado. The new species are compared with members of the family from North America and Europe. The new genus is differentiated by a smooth, narrowed sensillum and seven pairs of genital setae. Taxonomic and ecological data are also discussed.     

Plants of Arizona: a new species of Astragalus from the Kaibab Plateau

Astragalus atwoodii Welsh and Thorne is named and described on the basis of materials collected on the Kaibab Plateau in Coconino County, Arizona.     

A fourth new sauropod dinosaur from the Upper Jurassic pf the Colorado Plateau and sauropod bipedalism

The new sauropod, Cathetosaurus lewisi , is named and assigned to the Camarasauridae; it was collected from the Upper Jurassic Morrison Formation in western Colorado in 1967. Novel structural features of the skeleton in this genus, particularly in the axial skeleton, enabled it to assume and function to an unknown degree in a bipedal posture. Comparisons are made between C. lewisi and previously described sauropods. The following problems of sauropod locomotion are discussed; (1) sauropods lack two elements, sesamoids and patella, present in titanotheres; (2) sauropod limb and foot musculature, lacking leverage, is very inferior to that of titanotheres; (3) no previously described sauropod displays adequate structural specializations for voluntary bipedalism comparable to that of the new genus Cathetosaurus; (4) great weight and cartilaginous limb and foot joint structure restricted sauropods to a slow tempo of locomotion, suggesting a moderate to low rate of catabolic metabolism. Mammal and sauropod foot bones and their function are compared, and comparisons are made between the weight and structure of modern mobile machines and the locomotion and movement of large sauropods. Occurrence and taphonomy of C. lewisi are discussed.     

A new species of fossil Chrysothamnus (Asteraceae) from New Mexico

The new, presumably extinct species, Chrysothamnus pulchelloides, is formally described and illustrated. The plant materials came from Holocene packrat middens. Anatomical and phyletic relationships of the fossil species to extant taxa are discussed.     

Two new species of Aurealcaulis (Osmundaceae) from northwestern New Mexico

Two new osmundaceous species, Aurealcaulis moorei and A. bransonii , are described from the San Juan Basin of northwestern New Mexico. The area from which they were collected is uncertain, but it is presumed they came from the Lower Eocene San Jose Formation near Angel Peak, southeast of Bloomfield, New Mexico. The species are characterized by having a heterogeneous ( A. moorei ) to homogeneous ( A. bransonii ) pith, non- or partial closure of their leaf gaps, exarch protoxylem clusters, formation of their C-shaped leaf traces by fusion of two segments from adjacent xylem strands in their inner cortices, relatively low numbers of traces in their cortices (16-22 in A. moorei , 15-19 in A. bransonii ), roots arising from lateral margins of these segments, sclerenchymatous outer cortex that connects with the sclerotic ring of the petiolar vascular strand, crenate ( A. moorei ) or interrupted ( A. bransonii ) sclerenchyma lining the adaxial concavity of their petiole strands, and leaf bases that may or may not contain one, occasionally two, sclerotic cellular masses in their stipular wings in A. moorei and 6-8 more or less aligned masses in A. bransonii . They are compared with other osmundaceous taxa, particularly A. crossii Tidwell & Parker of Paleocene age. Because of variations in these new species, Aurealcaulis Tidwell & Parker is slightly emended to accept species of this genus with heterogeneous or homogeneous piths, protoxylem becoming endarch in the leaf traces, petiolar vascular strands formed by fusion of segments from the xylem strands in the inner cortex, outer cortex, or outside the stem, and the occurrence or nonoccurrence of sclerenchyma in the adaxial concavity of their petiolar vascular stands and in their stipular wings. The paleoecological conditions under which these species of Aurealcaulis grew are also considered.     

Two new species of Limnoriidae (Isopoda) from Papua New Guinea

Limnoria kautensis and Paralimnoria asterosa are two limnoriids new to science. They were found at a depth of 8–9 m in marine conditions burrowing in rainforest logs of timber species sufficiently dense to sink when lost during log-transporting operations. L. kautensis most closely resembles. L. pfefferi, from which it can be distinguished by the absence of a Y-shaped carina on pleonite 5, the bilobed nature of the lacinia mobilis of the mandible and differences in the proportions of the maxilliped, flagellum of antenna 2 and uropods. Paralimnoria asterosa differs from the only other member of its genus, P. andrewsi, in having a pronounced ring of basally-sheated radiating setae on pleonites 4 and 5 plus the pleotelson, and in details of the pattern of carinae, tubercles and depressions on the pleon and pleotelson.     

New records for Monotropa hypopithys (Ericaceae) from Colorado

Monotropa hypopithys L., rarely collected in Colorado, was taken five times during 1984. Coupled with previous collections, it is now known from 10 Colorado counties. The cool, moist August of 1984 may have contributed to its apparent ubiquity.     

Five new Uropodina species from New Caledonia (Acari: Mesostigmata)

Five new species – Deraiophorus pinesensis sp. nov., Oplitis hallidayi sp. nov., Castriidinychus neocaledonicus sp. nov., Trigonuropoda neocaledonica sp. nov. and Trigonuropoda fendai sp. nov. – are described and illustrated on the basis of specimens collected in New Caledonia. http://www.zoobank.org/urn:lsid:zoobank.org:pub:2F6876E3-948B-4EDC-93EF-4623033BD71E     

New records and range extensions of species of Dipogon (Hymenoptera, Pompilidae) in Colorado

Four species of Dipogon are recorded from Colorado for the first time. These are hurdi Evans, pulchripennis (Cresson), graenicheri Banks, and brevis (Cresson). All are inhabitants of wooded areas and are believed to nest in cavities in trees. Notes are presented on habitat and prey of these 4 species and of the recently described species kiowa Evans.     

A remarkable new genus and species of Cynipoidea (Hymenoptera) from Papua New Guinea

During the course of a recent investigation into the phylogeny of the Cynipoidea (Fergusson, 1990) a new species was discovered which is unusually elongate and has a remarkably deep incision between the metanotum and propodeum. This species constitutes a new genus, Eileenella, which is described below.