Identificatin of Native Typha species in Australia

The variability of some key characters used to identify the two Australian species of Typha (T. domingensis and T. orientalis) was quantitatively determined on 13 stands at different sites. Characters measured were plant height, leaf width, length of female inflorescence, diameter of female inflorescence and gap between male and female inflorescences. The three characters, length of female inflorescence, diameter of female inflorescence and gap between the inflorescences, used in conjunction with the latent vector from a canonical variates analysis could be used to identify the two species. The presence or absence of an auriculated leaf sheath was also found to be a useful character, while leaf shape was not. However, to obtain absolute identification, chromosome numbers can be determined easily on root tips.

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Clonal structure and fertility in a sympatric population of the peat mosses Sphagnum rubellum and Sphagnum capillifolium

Canadian Journal of Botany ◽

10.1139/b96-167 ◽

1996 ◽

Vol 74 (9) ◽

pp. 1375-1385 ◽

Cited By ~ 31

Author(s):

Nlls Cronberg

Keyword(s):

Leaf Shape ◽

Morphological Characters ◽

Clonal Structure ◽

Shape Variation ◽

Canonical Variates Analysis ◽

Hierarchical Structuring ◽

Canonical Variates ◽

Self Fertilization ◽

The Mean ◽

A Site

Data from isozyme and leaf shape variation are combined to explore the clonal structure at a site where hybridization between Sphagnum rubellum and Sphagnum capillifolium was previously indicated. Shoots of both species were sampled at 10-cm intervals along seven transects across different hummocks. Allelic data from 13 enzyme systems revealed 22 multilocus genotypes representing different clones, 18 being S. capillifolium and 4 being S. rubellum. The mean ± SE and maximum clonal length were 35 ± 8 cm and 160 cm, respectively. The sets of alleles found in the progeny of S. capillifolium were identical to the maternal complement of alleles in 78% of the material, indicating either self-fertilization or fertilization by a male with the same set of alleles at the screened loci. Outcrossing was detected in six cases. Patterns of differentiation and the hierarchical structuring of diversity among species, transects, and clones were analysed with canonical variates analysis using stem-leaf characters. A stronger relative differentiation was found between transects than between species. Clones identified by electrophoresis were usually morphologically well defined. Hybridization was indicated by morphological characters, occasional misplaced alleles, and signs of developmental instability. Keywords: allozymes, computerized image analysis, breeding system, clonal structure, Sphagnum rubellum, Sphagnum capillifolium.

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Revision of Australian Parathyginus with description of two new species, along with first detailed description of aedeagus in the family Heterogastridae (Hemiptera: Heteroptera: Lygaeoidea)

Zootaxa ◽

10.11646/zootaxa.5016.4.3 ◽

2021 ◽

Vol 5016 (4) ◽

pp. 503-522

Author(s):

M. B. MALIPATIL

Keyword(s):

New Species ◽

Male Genitalia ◽

Type Species ◽

Female Genitalia ◽

Male And Female ◽

Australian Species ◽

The Family ◽

Two New Species

The Australian species of the small heterogastrid genus Parathyginus Scudder, 1957 have been reviewed, resulting in the establishment of the junior subjective synonymy of P. doddi (Distant, 1918) with P. signifer (Walker, 1872), and the description of two new species, P. australis sp. nov. and P. acuminatus sp. nov. A redescription of the genus is provided with emphasis on male and female genitalia characters, along with a key to all included Australian species. Male genitalia, particularly the details of the aedeagus, have been rarely studied in this genus or for that matter the family Heterogastridae particularly due to the difficulty in inflating the inflatable sections. In this study, therefore, an attempt was made to fully inflate and describe the aedeagus of all the species included in this contribution, as well as of Heterogaster urticae (Fabricius, 1775), the type species of the oldest genus Heterogaster Schilling, 1829, of the family Heterogastridae.

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A multivariate approach to plant mineral nutrition: dose–response relationships and nutrient dominance in factorial experiments

Canadian Journal of Botany ◽

10.1139/b85-302 ◽

1985 ◽

Vol 63 (12) ◽

pp. 2138-2143 ◽

Cited By ~ 6

Author(s):

G. R. Shaver ◽

M. J. Lechowicz

Keyword(s):

Dose Response ◽

Nutrient Content ◽

N Fertilization ◽

Mineral Elements ◽

P Fertilization ◽

Canonical Variates Analysis ◽

Canonical Variates ◽

Low Levels ◽

High Fertilization ◽

K Fertilization

Canonical variates analysis was used to compare the effects of fertilization on the concentrations of five mineral elements (N, P, K, Ca, and Mg) in young shoot tissues of six tundra plant species of three different growth forms. There were two specific objectives: (i) to determine whether it was possible to describe meaningful dose–response relationships in a multivariate response to fertilization, and (ii) to determine the multivariate effect of N plus P fertilization in comparison with the effects of N or P added alone. The results showed that low levels of N–P–K fertilization caused a shift in multivariate nutrient content that was intermediate between the control values and the shift caused by high fertilization, and in the same direction as the latter. In a June harvest, the effect of N plus P fertilization was very similar to the effect of N fertilization alone. However, in August the N plus P effect was dominated by the response to P alone. In all of the analyses, the fundamental similarities and differences among unfertilized plants of each species and growth form were maintained under fertilization.

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Studies on the Australian Muscidae (Diptera). VIII. The genus Lispe Latreille, 1797

Zootaxa ◽

10.11646/zootaxa.4557.1.1 ◽

2019 ◽

Vol 4557 (1) ◽

pp. 1 ◽

Cited By ~ 5

Author(s):

ADRIAN C. PONT

Keyword(s):

New Species ◽

Habitat Preferences ◽

Key To Species ◽

Male And Female ◽

Australian Species

The 39 Australian species of the genus Lispe Latreille are revised, including 22 new species here described. A key to species is given, and descriptions of both sexes are provided, including the male and female terminalia. Illustrations of external characters and of the male and female terminalia are given, including habitus photographs of the new species. Summaries of biology and habitat preferences, where known, are described. 22 new species are described: Lispe absentiseta sp. nov., Lispe affinis sp. nov., Lispe attenuata sp. nov., Lispe brendana sp. nov., Lispe caespitosa sp. nov., Lispe cilitibia sp. nov., Lispe collessi sp. nov., Lispe crinitarsis sp. nov., Lispe cristata sp. nov., Lispe esuriens sp. nov., Lispe floccosa sp. nov., Lispe glauca sp. nov., Lispe gracilitarsis sp. nov., Lispe grisea sp. nov., Lispe hamulifera sp. nov., Lispe howeana sp. nov., Lispe incana sp. nov., Lispe lamellata sp. nov., Lispe nigrimanoides sp. nov., Lispe orbitalis sp. nov., Lispe penicillata sp. nov. and Lispe vikhrevi sp. nov.

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Zehneria longiflora (Cucurbitaceae), a new species from Kenya

Phytotaxa ◽

10.11646/phytotaxa.324.1.7 ◽

2017 ◽

Vol 324 (1) ◽

pp. 89 ◽

Cited By ~ 3

Author(s):

NENG WEI ◽

DANIEL ODHIAMBO MIYAWA ◽

MELLY KIMUTAI DAVID ◽

VERONICAH MUTELE NGUMBAU ◽

ZHI-XIANG ZHONG ◽

...

Keyword(s):

New Species ◽

Male And Female ◽

Female Inflorescence ◽

A New Species

Zehneria longiflora, a new species of Cucurbitaceae from Nandi County, Kenya, is described and illustrated here. It is most similar to Z. oligosperma, but differs mainly by its longer receptacle-tube, stamens that are inserted at the middle of the receptacle-tube and with longer filaments, as well as characters of the male and female inflorescence.

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Shoot ontogeny in Fraxinus pennsylvanica (green ash). II. Development of the inflorescence

Canadian Journal of Botany ◽

10.1139/b89-250 ◽

1989 ◽

Vol 67 (7) ◽

pp. 1966-1978 ◽

Cited By ~ 2

Author(s):

W. R. Remphrey

Keyword(s):

Fruit Set ◽

Fraxinus Pennsylvanica ◽

Green Ash ◽

Dioecious Species ◽

Male And Female ◽

Floral Buds ◽

Growing Seasons ◽

Female Inflorescence ◽

Mature Flower ◽

Floral Apex

From initiation to fruit set, which occurs over three growing seasons, eight stages are recognized in the development of axillary inflorescences in the dioecious species Fraxinus pennsylvanica var. subintegerrima (Vahl) Fern, (green ash). In the first season, buds are initiated in the axils of foliage leaves. As the shoots expand in the following spring, the buds complete their development. Although similar at first, differences begin to emerge between vegetative and inflorescence buds in that the latter produce robust second-order meristems, the incipient paracladia, protruding close to the original apex. After about 3–4 weeks, when the initiation of such buds is complete, the terminal and subtending lateral meristems present on each axis develop into a three-membered cluster of floral buds. There was a mean of 214.3 ± 12.2 floral buds initiated per female inflorescence, and the number generally increased with the length of the associated shoot. A ridge, the incipient perianth, begins to form around the periphery of each rounded floral apex. Male and female floral buds are not distinguishable at this stage, but the inflorescence buds are distinctly different from vegetative buds. The male and female buds then diverge in their development in that an identation forms at the summit of the incipient gynoecium and male buds initiate two or three anthers. By autumn, the gynoecium is distinctly conical, with an orifice at its summit, and the anthers are lobed. There is lobing of the perianth ridge, but in the mature flower distinct organs traceable to such lobes could not readily be identified.

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Phenotypic variation of south-western Atlantic clam Mactra isabelleana (Bivalvia: Mactridae)

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315412000410 ◽

2012 ◽

Vol 93 (2) ◽

pp. 511-517 ◽

Cited By ~ 7

Author(s):

Javier H. Signorelli ◽

Federico Márquez ◽

Guido Pastorino

Keyword(s):

Principal Component ◽

Shell Shape ◽

Physical Parameters ◽

Buenos Aires Province ◽

Shape Variation ◽

Geometric Morphometric ◽

Western Atlantic ◽

Canonical Variates Analysis ◽

Canonical Variates ◽

Geometric Morphometric Method

The phenotypic shell shape variation of Mactra isabelleana was tested using the geometric morphometric method. Four localities were sampled along the Río de la Plata estuary and the coast of Buenos Aires province. Principal component analysis and canonical variates analysis of the first principal components were performed to reveal the shell variation and differences among localities, respectively. The specimens from different microhabitats mostly overlapped, although differences in shape were observed in the development of the umbo, the enlargement of the dorsoventral axes and the elongation of the posterior end. The ecological and physical parameters that could influence shell shape variation are discussed.

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A remarkable new plant bug genus and species (Hemiptera, Heteroptera, Miridae, Deraocorinae) from the Australian wet tropics

Zootaxa ◽

10.11646/zootaxa.4232.1.9 ◽

2017 ◽

Vol 4232 (1) ◽

pp. 123 ◽

Cited By ~ 1

Author(s):

REZA HOSSEINI ◽

GERASIMOS CASSIS

Keyword(s):

New Species ◽

Male Genitalia ◽

New Genus ◽

Scanning Electron Micrographs ◽

Male And Female ◽

Biogeographic Region ◽

Wet Tropics ◽

Key Characters ◽

Scanning Electron ◽

Made In

A new genus and new species of deraeocorine plant bug, Kalamemiris gen. nov. and Kalamemiris collessi sp. nov., is described from Australia. Illustrations of male genitalia, scanning electron micrographs of key characters of the male and female habitus, as well as male genitalic characters are provided. The diagnosis of the new genus is made in comparison to other deraeocorines of the Australian biogeographic region.

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