Permineralized fruits and seeds from the Princeton chert (Middle Eocene) of British Columbia: Vitaceae

1990 ◽  
Vol 68 (2) ◽  
pp. 288-295 ◽  
Author(s):  
Sergio R. S. Cevallos-Ferriz ◽  
Ruth A. Stockey
Keyword(s):  
British Columbia ◽  
Middle Eocene ◽  
Outer Zone ◽  
Structural Features ◽  
Anatomical Structure ◽  
Thin Walled ◽  
Polyhedral Cells ◽  
A New Species

Four permineralized vitaceous seeds are described from the Middle Eocene Princeton chert, Allenby Formation, British Columbia. Three distinct types of ruminate perchalazal seeds are recognized, one is described as a new species Ampelocissus similkameenensis Cevallos-Ferriz et Stockey sp.nov., while the remaining seeds are referred to as type 1 and type 2 seeds. Five integumentary zones are recognized in each seed: zone 1 is an outer zone of thin-walled rectangular to polyhedral cells; zone 2 is a zone of thick-walled sclereids; zone 3 is a zone of cells with spiral thickenings; zone 4 is a zone of rectangular thin-walled cells (when preserved); and zone 5 is a zone of tangentially elongated thin-walled cells with dark contents. The chalaza in seeds of A. similkameenensis and the type 1 seed has three distinct zones, while in the type 2 seed it contains cells similar to integumentary zone 2. These Princeton seeds illustrate that structural features of Eocene Vitaceae include characters unlike those of extant taxa. This information contributes to our knowledge of anatomical structure within the group as a whole and underscores the need for review of both fossil and extant Vitaceae. Paucity of vitaceous seeds in the Princeton chert compared to the large number of preserved aquatic and semiaquatic remains suggests that they represent plants that grew in a nearby environment. Abrasion of the integument suggests that like extant seeds, they may have been dropped after passing through the gut of a bird.

scholarly journals Glycera sheikhmujibi n. sp. (Annelida: Polychaeta: Glyceridae): A New Species of Glyceridae from the Saltmarsh of Bangladesh

Diversity ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 213
Author(s):  
M. Hossain ◽  
Pat Hutchings
Keyword(s):  
Electron Microscope ◽  
New Species ◽  
Scanning Electron Microscope ◽  
Morphological Characteristics ◽  
Longitudinal Ridge ◽  
Type 3 ◽  
A New Species ◽  
Scanning Electron

A new species of glycerid polychaete, Glycera sheikhmujibi, is described from the saltmarsh on the central coast of Bangladesh. The species is identified based on morphological characteristics using both a light microscope and scanning electron microscope (SEM). The species is characterized by the presence of three distinct types of proboscideal papillae: type 1 papillae (conical with three transverse ridges), type 2 (conical with a straight, median, longitudinal ridge), and type 3 (round, shorter, and broader, with a straight, median, longitudinal ridge). It has a Y-shaped aileron with gently incised triangular base, almost equal-size digitiform noto- and neuropodial lobes in the mid-body, and long ventral cirri at the posterior end. The new species is compared with its related species, previously described from the Bay of Bengal region. A key to all these species is provided.

Inclusion patterns in zoned garnets from Magerøy, north Norway

1984 ◽  
Vol 48 (346) ◽  
pp. 21-26 ◽  
Author(s):  
T. B. Andersen
Keyword(s):  
Rapid Growth ◽  
Outer Zone ◽  
Prograde Metamorphism ◽  
Growth Type ◽  
Compositional Zoning ◽  
Garnet Porphyroblasts ◽  
The Matrix ◽  
Quartz Grains

AbstractGarnet porphyroblasts in metasediments from Magerøy crystallized during static metamorphism. They display three optical zones, each having characteristic inclusions and chemistry. The compositional zoning is related to prograde metamorphism (an inner zone, 1, and a graphite-bearing zone) and retrogression (the outer zone, 2). Inclusions of two types are present in zone 1: type 1 are equidimensional remnants of the matrix, preferentially included along planes of rapid growth; type 2 are tubular and represent recrystallized quartz grains concentrated along defects in the garnet lattice. The defects are lineage boundaries between growth segments related to screw dislocations on crystal faces. Crystal growth developed at relatively high degrees of supersaturation, but below the supersaturation required for the development of dendrites. The inclusions suggest rapid growth of zone 1, caused by heat flow from an adjacent interkinematic mafic/ultramafic intrusive complex. The graphite-bearing zone crystallized at the metamorphic peak, while the inclusion-free idioblasfic rim probably developed during retrograde metamorphism.

Permineralized monocotyledons from the Middle Eocene Princeton chert (Allenby Formation) of British Columbia: Alismataceae

1989 ◽  
Vol 67 (9) ◽  
pp. 2636-2645 ◽  
Author(s):  
Diane M. Erwin ◽  
Ruth A. Stockey
Keyword(s):  
British Columbia ◽  
Middle Eocene ◽  
Vascular Bundles ◽  
Western North America ◽  
Ground Tissue ◽  
Abaxial Surface ◽  
Parenchyma Cells ◽  
In Series ◽  
Thin Walled ◽  
Tannin Cells

One small monocotyledon petiole, 1.8 × 1.5 mm wide, has been recovered from the Princeton chert in the Middle Eocene Allenby Formation, British Columbia. The petiole, rectangular in transverse outline, shows approximately 36 circular to oval-shaped vascular bundles within aerenchymatous ground tissue that includes tannin cells. The epidermis is underlain by a discontinuous hypodermis of thick-walled, pitted cells. Vascular bundles are in five series: (I) a median U-shaped arc of 11 – 13 bundles; (II) an abaxial arc of 6 bundles located below the main arc; (III) two short abaxial arcs of 3 bundles each; (IV) 2 bundles just below the abaxial surface; and (V) an adaxial series of 7 bundles that show an inverse orientation to those bundles in series I–IV. Larger bundles are collateral, with a protoxylem lacuna encircled by a ring of 9 – 14 thin-walled parenchyma cells, a relatively well-developed phloem strand, and one to three thin-walled metaxylem elements. Based on bundle arrangement, orientation, and morphology, the fossil petiole most closely resembles those of the Butomaceae and Alismataceae. This new species, Heleophyton helobiaeoides Erwin and Stockey gen. et sp.nov., in the Princeton chert flora, documents the presence of the Alismataceae in the Middle Eocene of western North America and provides further evidence that the locality represents an ancient aquatic ecosystem.

Glyceridae (Annelida: Polychaeta) from Guam, Mariana Islands with description of a new species of Glycera Savigny in Lamarck, 1818

Zootaxa ◽  
2012 ◽  
Vol 3338 (1) ◽  
pp. 60 ◽  
Author(s):  
WAGNER F. MAGALHÃES ◽  
ALEXANDRA E. RIZZO
Keyword(s):  
New Species ◽  
Shallow Water ◽  
Mariana Islands ◽  
Longitudinal Ridge ◽  
Body Segments ◽  
Anterior Side ◽  
Shallow Water Sediments ◽  
A New Species

Glycera juliae sp. nov., is described from shallow water sediments within Apra Harbor, Guam, Mariana Islands. This spe-cies is characterized by the presence of ailerons with rounded triangular base; proboscideal papillae of type 1 mainly dig-itiform with straight, median, longitudinal ridge and type 2 shorter and broader, oval to globular, without ridges; twoslender triangular to digitiform prechaetal lobes, notopodial lobe slightly shorter than neuropodial lobe, two shortpostchaetal lobes, rounded anteriorly with posterior notopodial lobe becoming sub-triangular and longer than roundedneuropodial lobe; branchiae present, retractile, simple digitiform attached medially on anterior side of parapodia and adark brown pigmentation forming transverse bands on prostomium and body segments. It is most similar to Glycera nico-barica and G. macintoshi by the shape of parapodial structures but also shares similarities with Glycera sphyrabrancha,G. branchiopoda, G. guatemalensis, G. semibranchiopoda and G. southeastatlantica by the shape and types of proboscidialpapillae, differing on the shape of the ailerons, parapodial lobes and presence of branchiae. The occurrence of Glycera tesselata is confirmed for Guam and specimens are described and illustrated with SEM photographs.

A new species of Amazophrynella (Anura: Bufonidae) with two distinct advertisement calls

Zootaxa ◽  
2019 ◽  
Vol 4577 (2) ◽  
pp. 316 ◽  
Author(s):  
IGOR LUIS KAEFER ◽  
ROMMEL R. ROJAS ◽  
MIQUÉIAS FERRÃO ◽  
IZENI PIRES FARIAS ◽  
ALBERTINA PIMENTEL LIMA
Keyword(s):  
New Species ◽  
Dominant Frequency ◽  
Lateral View ◽  
Advertisement Call ◽  
Adult Males ◽  
Advertisement Calls ◽  
Call Type ◽  
A New Species

Here we describe a new species of the toad genus Amazophrynella (Bufonidae) from the south margin of the Amazon River in Santarém, state of Pará, Brazilian Amazonia. The new species can be diagnosed by (1) medium body size for the genus: adult females 19.5–20.4 mm SVL, adult males 13.0–14.5 mm SVL; (2) snout acuminate in lateral view; (3) Finger I larger and robust; (4) Finger I nearly equal in size than Finger II; (5) palmar tubercle rounded, covering ¼ of hand; (6) pigmented callus in Finger I in males; in life: (7) brown stain on throat and chest; (8) black dots on venter. Males emit two distinct advertisement calls: the call type 1 consists of a relatively long note (mean 0.248 s) with a mean dominant frequency of 3526 Hz. The call type 2 is arranged in bouts of 6 to 22 notes with mean dominant frequency of 3450 Hz and much shorter note durations (mean 0.034 s). In this study we also redescribe the advertisement call of A. minuta, which also emits a second call type. 

Metasequoia milleri n.sp., anatomically preserved pollen cones from the Middle Eocene (Allenby Formation) of British Columbia

1979 ◽  
Vol 57 (8) ◽  
pp. 958-970 ◽  
Author(s):  
Gar W. Rothwell ◽  
James F. Basinger
Keyword(s):  
British Columbia ◽  
Middle Eocene ◽  
Metasequoia Glyptostroboides ◽  
Plant Remains ◽  
Exine Ornamentation ◽  
Pollen Sacs ◽  
Pollen Cone ◽  
Fertile Region ◽  
A New Species ◽  
Subtending Leaves

The discovery of well preserved, permineralized plant remains in Eocene sediments near Princeton, British Columbia, provides an opportunity to describe Metasequoia milleri, a new species of taxodiaceous pollen cone. Individual specimens are up to 3.0 mm long and 2.9 mm in diameter and are subtended by a vegetative zone of scale-like leaves. Approximately 30 microsporophylls are attached to the axis, and each bears three ovoid pollen sacs. The distal-most subtending leaves imbricate and enclose the fertile region. Pollen is ovoid to subspheroidal with an erect, protruding leptoma. Grains measure 19–27 μn in diameter and have verrucate exine ornamentation with numerous orbicules. These fossils show that pollen cones anatomically similar to those of extant Metasequoia glyptostroboides were present as early as Middle Eocene time.

The influence of mantle plume in the genesis of the Cache Creek oceanic igneous rocks: implications for the geodynamic evolution of the inner accreted terranes of the Canadian Cordillera

2001 ◽  
Vol 38 (4) ◽  
pp. 515-534 ◽  
Author(s):  
M Tardy ◽  
H Lapierre ◽  
L C Struik ◽  
D Bosch ◽  
P Brunet
Keyword(s):  
British Columbia ◽  
Rare Earth ◽  
Earth Element ◽  
Oceanic Island ◽  
Igneous Rocks ◽  
Fault System ◽  
Ultramafic Rocks ◽  
Type 3

West of Prince George, British Columbia, the Cache Creek Terrane is composed of mafic lavas interlayered with both mid-Permian pelagic limestones and Upper Triassic siliceous shales and greywackes. Gabbro, basalt, dolerites, and foliated clinopyroxene-rich ultramafic rocks are exposed within the Pinchi Fault system. The mid-Permian lavas show affinities of oceanic island tholeiites. Among the Triassic lavas, three types of rocks have been distinguished. Type 1 is geochemically similar to the mid-Permian volcanic rocks. Type 2 differs from type 1 by higher TiO2 abundances and convex rare earth element patterns. Type 3 has the highest Zr, Nb, and Ta abundances and the greatest light rare earth element enrichment. The mafic rocks within the Pinchi Fault system are similar to N-type mid-ocean-ridge basalt (N-MORB), and the foliated ultramafic rocks are characterized by very low trace element contents, similar to extremely depleted harzburgites. Permian lavas and Triassic type 1 and igneous rocks from the Pinchi Fault system have the highest εNd(i) ratios (+7.4 to +9.6) and those of type 3 alkali have the lowest ratios (+2.0 to +5.3). The εNd(i) values of type 2 are intermediate between those of type 1 (~+7) and type 3 (~+4.9). This suggests that the Triassic rocks generated from a heterogeneous plume source or the mixing between depleted N-MORB and enriched oceanic island basalt sources. If the mafic igneous rocks sampled in central British Columbia are representative of the preserved parts of an oceanic crust, within the Cache Creek Terrane, then that crust was dominated by oceanic plateau components, perhaps due to the difficulty of subducting thick crust.

Dictyosporium wuyiense sp. nov. from Wuyi Mountain China

Phytotaxa ◽  
2017 ◽  
Vol 314 (2) ◽  
pp. 251 ◽  
Author(s):  
YING ZHANG ◽  
CHENG-SHAN CAI ◽  
GUO-ZHU ZHAO
Keyword(s):  
Phylogenetic Analyses ◽  
Distinct Species ◽  
Potato Dextrose Agar ◽  
Molecular Evidence ◽  
Dead Branch ◽  
Anamorphic Fungus ◽  
Apical Cells ◽  
A New Species

Dictyosporium wuyiense, a new anamorphic fungus collected on a dead branch of bamboo in Tongmugou, Wuyi Mountain, China, is described and illustrated. It is characterised by being cheiroid, septate, complanate, and yellow, with two types of conidia composed mostly of five parallel compact rows of cells, sometimes with variable hyaline apical vesical appendages. Type 1 conidia are longer and the three central rows are protruding with swollen apical cells; type 2 conidia are wider and fan-shaped, with rows of apical cells approximately the same length. The conidial morphology on potato dextrose agar plates was variable, most with 2–3 vesical appendages. In phylogenetic analyses of the internal transcribed spacer (ITS) of rDNA, Dictyosporium wuyiense clustered with most Dictyosporium species in Dictyosporiaceae, but was a distinct species. Both morphological and molecular evidence support its description as a new species. A brief review of Dictyosporium and allied species is provided.

Permineralized fruits and Seeds from the Princeton chert (Middle Eocene) of British Columbia: Lythraceae

1988 ◽  
Vol 66 (2) ◽  
pp. 303-312 ◽  
Author(s):  
Sergio R. S. Cevallos-Ferriz ◽  
Ruth A. Stockey
Keyword(s):  
British Columbia ◽  
New Species ◽  
Middle Eocene ◽  
A New Species

Two types of lythraceous fruit and seed remains are described from the Middle Eocene, Allenby Formation of Princeton, British Columbia. Small globose, pedicellate fruits with persistent sepals, four to six locules, septa complete to the fruit apex, axial placentation, a palisade-like endocarp, and pyramidal seeds are referable to the genus Decodon Gmel. Numerous dispersed anatropous seeds of the same morphology show rounded or angular comers, lack lateral wings, and have a raphe that begins near the micropyle, passing through the middle integumentary layer on the dorsal face to the seed chalaza. Integuments are three zoned and seeds bear a ventral germination valve composed of radially elongated rectangular cells similar to the outer integumentary layer. Seeds show a prominent hypostase and dicotyledonous embryos with remains of a suspensor. These fruits and seeds are described as a new species of Decodon, D. allenibyensis Cevallos-Ferriz et Stockey sp.nov., which represents the oldest known species of the genus described to date. One fruit with several large, pyramidal lythraceous seeds is described. Seeds have three integumentary zones, the outer of which appears to have been mucilaginous. These remains most closely resemble the genus Lawsonia L., but additional specimens are needed to confirm this comparison. These lythraceous remains add to our knowledge of the Princeton angiosperm flora and further support the idea that these plants lived along a lake or marsh.

A COMPARATIVE MORPHOLOGY OF THE VENOM APPARATUS OF FEMALE BRACONIDS (HYMENOPTERA: BRACONIDAE)

1979 ◽  
Vol 111 (9) ◽  
pp. 1013-1024 ◽  
Author(s):  
Kathryn M. Edson ◽  
S. Bradleigh Vinson
Keyword(s):  
Comparative Morphology ◽  
Thin Walled ◽  
Ancestral Character States

AbstractThe venom apparatus was examined in 160 species of female Braconidae. The venom apparatus is illustrated for females of 26 representative genera and those of the remaining females are described.Our findings indicate that there are two types of venom apparatus present in Braconidae. Type 1 is found in females of subfamilies having more ancestral character states: Doryctinae, Spathiinae, Braconinae, Opiinae, Rogadinae, Alysiinae, and Ichneutinae. Typically, type 1 venom apparatus consists of a cone-shaped reservoir which is surrounded by many longitudinal and circular muscles and lined with a relatively thick cuticular intima, gland filaments, and a venom duct. Type 2 is found in females of subfamilies having more derived character states: Cheloninae, Microgasterinae, Agathidinae, Macrocentrinae, Helconinae, Neoneurinae, Centistinae, Paxylommatinae, and Euphorinae. Typically, type 2 consists of a thin-walled reservoir surrounded by relatively few muscles, two gland filaments, and a venom duct.The Aphidiinae is the only subfamily in which the females examined have both types of venom apparatus represented. Of those genera examined, only females of Praon have type 2, while females of the remaining genera have type 1 venom apparatus.Braconid females with type 1 venom apparatus are either ectoparasitoids or endoparasitoids which pupate within the host remains, while those females with type 2 are endoparasitoids which pupate outside the host remains.

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