Austromorium, a new myrmicine ant genus from Australia (Hymenoptera: Formicidae)

Zootaxa ◽  
2009 ◽  
Vol 2193 (1) ◽  
pp. 62-68 ◽  
Author(s):  
STEVEN O. SHATTUCK

The myrmicine ant genus Austromorium is described for two Australian endemic species. One species has been known for some time but its taxonomic placement has been unclear while the second species is newly described. They are thought to be related to Lordomyrma and Austromorium is tentatively placed within the tribe Stenammini. These are ground-nesting ants although little else is known of their biology. While one species is widespread across semi-arid southern Australia the other is restricted to a narrow band of coastal south-western Western Australia.

1992 ◽  
Vol 32 (2) ◽  
pp. 237
Author(s):  
TR Hill ◽  
ARJ Bissell ◽  
JR Burt

The yield, plant characteristics (pseudostem height and girth), and relative tolerance to bunch loss of 4 banana varieties (Musa AAA Group, Cavendish subgroup) were studied over 2 crops in the semi-arid subtropics at Carnarvon, Western Australia. The varieties were New Guinea Cavendish, Chinese Cavendish, Hsien.Jen Chiao, and the most widely grown Australian variety, Williams. The marketable yield of Williams was higher (P<0.05) than the mean of the other varieties in the parent crop (70.2 v. 50.7 t/ha) and ratoon 1 crop (65.8 v. 34.4 t/ha). This was the result of lower (P<0.05) bunch loss, about 41% less over the 2 crops, than for the other varieties. Resistance to bunch loss-pseudostem breakage and bunch peduncle snap was not associated with the shorter varieties (New Guinea Cavendish and Chinese Cavendish), but resistance to choke throat was associated with the taller varieties (Williams and Hsien Jen Chiao).


1974 ◽  
Vol 22 (1) ◽  
pp. 157 ◽  
Author(s):  
FD Wilson

Of the approximately 50 species in Hibiscus section Furcaria DC. emend. Hochr., 15 native and one naturalized taxa are recognized in Australia. Thirteen of the 15 native taxa are endemic; four of these are described as new (Hibiscus arnhemensis, H. bymesii, H. minutibracteolus and H. mustiae). Of the other two species, H. meraukensis Hochr. is the only one that is wide ranging in Australia proper, being distributed from the Kimberleys of Western Australia to south-eastern Queensland; it occurs also in neighbouring southern New Guinea. The other one, H. diversifolius Jacq., is confined to the east coast from southern Queensland to central New South Wales in Australia, but its total distribution is pantropical. The single naturalized species, H. sabdariffa L., was introduced into Australia in the 19th century and grown for its fleshy calyces, which were processed and marketed as 'rosella jam'. Fourteen of the 15 native taxa form a morphologically coherent group within Hibiscus section Furcaria and are characterized by involucral bracteoles with entire apices and calyx lobes without nectaries on the midrib. The nine taxa for which chromosome numbers are available are also cytologically coherent (hexaploid: n = 54). H. diversifolius is set apart from the other taxa by its calyces with nectaries, its octoploid (n = 72) chromosome number, and its extra-Australian distribution. It most likely had a history in Australia distinct from that of the endemic species.


2009 ◽  
Vol 27 (11) ◽  
pp. 4221-4227 ◽  
Author(s):  
J. F. McKenzie

Abstract. This paper provides an analysis of the combined theory of gravity-inertial-Rossby waves on a β-plane in the Boussinesq approximation. The wave equation for the system is fifth order in space and time and demonstrates how gravity-inertial waves on the one hand are coupled to Rossby waves on the other through the combined effects of β, the stratification characterized by the Väisälä-Brunt frequency N, the Coriolis frequency f at a given latitude, and vertical propagation which permits buoyancy modes to interact with westward propagating Rossby waves. The corresponding dispersion equation shows that the frequency of a westward propagating gravity-inertial wave is reduced by the coupling, whereas the frequency of a Rossby wave is increased. If the coupling is sufficiently strong these two modes coalesce giving rise to an instability. The instability condition translates into a curve of critical latitude Θc versus effective equatorial rotational Mach number M, with the region below this curve exhibiting instability. "Supersonic" fast rotators are unstable in a narrow band of latitudes around the equator. For example Θc~12° for Jupiter. On the other hand slow "subsonic" rotators (e.g. Mercury, Venus and the Sun's Corona) are unstable at all latitudes except very close to the poles where the β effect vanishes. "Transonic" rotators, such as the Earth and Mars, exhibit instability within latitudes of 34° and 39°, respectively, around the Equator. Similar results pertain to Oceans. In the case of an Earth's Ocean of depth 4km say, purely westward propagating waves are unstable up to 26° about the Equator. The nonlinear evolution of this instability which feeds off rotational energy and gravitational buoyancy may play an important role in atmospheric dynamics.


Oryx ◽  
1991 ◽  
Vol 25 (4) ◽  
pp. 206-208 ◽  
Author(s):  
Vicente Berovides Alvarez ◽  
Antonio Comas González

Cuba is home for 10 endemic species of hutia. Three of these have become scarce, or extinct, in some parts of their historical range, but remain sufficiently abundant elsewhere to make their conservation of no immediate concern. Of the other seven species, one is believed to be extinct and the rest are in grave danger. The pressures they face include capture by man, competition with introduced rats and destuction of their habitat. Urgent measures are required if these species are to survive.


1970 ◽  
Vol 36 (2) ◽  
pp. 139-144 ◽  
Author(s):  
Fergan Karaer ◽  
Ferhat Celep

Scorzonera amasiana Hausskn. and Bornm. was described from type specimens collected by J.F.N. Bornmueller in 1889 but it was not collected again until 1993, when it was found near Amasya, Turkey. Populations of S. amasiana were quite small at that limited locations and were vulnerable to human impacts. Therefore, suitable conservation strategies should be developed immediately in order to protect the species from probable extinction. Here, an additional three small populations are reported. Brief history, morphology, habitat and ecology of this endemic species have been discussed. Its current conservation status was reevaluated with respect to the latest IUCN criteria. A key to distinguish it from the other closely related Turkish species is also provided and its distribution map is appended.   Key words: Endangered, Rediscovery, Scorzonera, Turkey DOI = 10.3329/bjb.v36i2.1502 Bangladesh J. Bot. 36(2): 139-144, 2007 (December)


2010 ◽  
Vol 62 (4) ◽  
pp. 1151-1162 ◽  
Author(s):  
Marina Juskovic ◽  
P. Vasiljevic ◽  
V. Randjelovic ◽  
V. Stevanovic ◽  
Branka Stevanovic

Daphne malyana Blecic (Thymeleaceae) is an endemic species of the western part of the Balkan Peninsula, distributed in the mountains, canyons and gorges of N. Montenegro, E. Bosnia and W. Serbia. The comparative morphoanatomic investigations have included four distantly separated populations of the species D. malyana, i.e. two from Serbia, from the ravines of Sokoline and Vranjak on Mt. Tara, and two from Montenegro, in the canyons of the Tara and Piva rivers. Comparative morphoanatomical studies have shown the presence of general adaptive characteristics of a specific, conservative xeromorphic type, slightly differing in each population. Principal component analysis (PCA) and canonical discriminant analysis (CDA) of 20 morphoanatomical characteristics of the leaves and stems have shown a clear distinction between the populations from the river Piva canyon (Montenegro) and those from the Sokoline ravine (Serbia), on one side, and those of Vranjak gorge (Serbia) and of the river Tara canyon (Montenegro) on the other side. It may be assumed that the mild morphological variability of the isolated populations of the Balkan endemic species D. malyana in the canyons and gorges seem to have been affected by the microclimate conditions in their habitats.


1943 ◽  
Vol 4 (12) ◽  
pp. 329-356 ◽  

Born on 10 September 1859, John Norman Collie was the second son of John Collie and the grandson of George Collie, an Aberdeen merchant, whose ancestors came from Ireland in the days of Cromwell. George Collie married Margaret Roy, the daughter of Captain Roy McGregor. George Collie’s brother was a surgeon in the Royal Navy during the Napoleonic wars. He served on the warships which annexed Western Australia. He discovered the Collie river, and the town of Collie, also named after him, celebrated its centenary in 1935 when the Premier of Western Australia unveiled a statue to him. Dr Collie wrote to his brother George a number of letters in which he described his experiences in Western Australia, and these letters, as the result of negotiations by Professor N. T. M. Wilsmore, himself a native of Perth, W. A.,and a student and later a lecturer at University College, London, are now in the archives of the cities of Perth and Canberra. John Collie married Selina Mary, the third daughter of Henry Winkworth, the son of the Rev. Henry Winkworth who was the vicar of St Saviour’s, Southwark. Henry Winkwrorth married Miss Dickenson of Kentish origin and had by her four daughters, Catherine, Susanna, Selina Mary and Alice, and two sons. Catherine was the author of Lyra Germanica , and Susanna wrote a life of Catherine. Susanna worked for many years in Clifton and Bristol on the provision of model dwellings for workpeople and was in fact one of the pioneers in this field. John Collie and his wife had four sons, the two eldest being Henry and John Norman, and one daughter, Susan Margaret, who was their third child and for many years Head of the Bedford High School for Girls. The foregoing epitome of John Norman’s ancestry is of considerable interest. On the one side he had Highland blood in him and from the other he inherited the Winkworth personality which revealed itself in so many members of that family. To this may be attributed the outstanding personality with which he was unquestionably endowed.


2014 ◽  
Vol 153 (2) ◽  
pp. 371-380 ◽  
Author(s):  
A. L. A. NEVES ◽  
R. D. SANTOS ◽  
L. G. R. PEREIRA ◽  
G. F. OLIVEIRA ◽  
C. B. SCHERER ◽  
...  

SUMMARYForage sorghum (FS) (Sorghum bicolor(L.) Moench) is a key feed source for ruminants owing to its high yield and drought tolerance. The present paper assessed the agronomic characteristics, silage quality, intake and digestibility of five new Brazilian sorghum cultivars (BRS Ponta Negra variety, BRS 655 hybrid, BR 601 hybrid, BRS 506 variety and BRS 610 hybrid). Forages were grown (randomized complete block design) in a typical Brazilian north-eastern semi-arid climate, irrigated with 267 mm water, harvested as plants reached the soft dough stage of grain maturity and ensiled under laboratory and farm conditions. Apparent digestibility of the silages was determined using 25 Santa Inês lambs. BRS 506 outperformed the other cultivars in dry matter (DM) and digestible DM yields/ha. BRS 506 exhibited the lowest neutral detergent fibre (NDF) and acid detergent fibre (ADF) contents and the highestin vitrodry matter digestibility (IVDMD) of the cultivars examined. BRS 655 produced the lowest level of lactic acid and the highest pH and ammonia-N concentration. There was no difference in intake or digestibility of DM among cultivars. Silages produced from BRS Ponta Negra resulted in higher crude protein (CP) intake than BRS 655. Silages made from BRS 506 and BRS Ponta Negra resulted in a greater digestibility of CP than those produced from BRS 655. Intake of NDF in silages generated from BRS Ponta Negra and BRS 610 was higher than that found in other cultivars. Although an average Brazilian North-eastern FS exhibited similar characteristics to other cultivars grown in dry regions around the world, the results indicated that BRS 506 had a yield advantage and higher nutritive value under Brazilian semi-arid conditions as compared to the other cultivars examined.


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