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Monandrous
In botanical terms, monandrous simply means to have a single stamen. In orchids A distinction between monandrous and other flowers is particularly relevant in the classification of orchids. The monandrous orchids form a clade consisting of the subfamilies Orchidoideae, Vanilloideae, and Epidendroideae. The other subfamilies, Apostasioideae and Cypripedioideae, have at least two stamens. In animals In animals, a monandrous system occurs when females have one mate at a time. For example, a female speckled wood butterfly will typically only mate once within her short lifetime. This is also common in certain bee species, like ''Bombus terrestris'' and '' Bombus pratorum'', where a female will only mate with one male during her nuptial flight and use the sperm reserves for the rest of her life. This is also seen in a few species of stingless bees, like ''Plebeia remota'', where the males will attempt to mate with the queen as she tries to leave the nest, but only one male will be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speckled Wood (butterfly)
The speckled wood (''Pararge aegeria'') is a butterfly found in and on the borders of woodland areas throughout much of the Palearctic realm. The species is subdivided into multiple subspecies, including ''Pararge aegeria aegeria'', ''Pararge aegeria tircis'', ''Pararge aegeria oblita'', and ''Pararge aegeria insula''. The color of this butterfly varies between subspecies. The existence of these subspecies is due to variation in morphology down a gradient corresponding to a geographic cline. The background of the wings ranges from brown to orange, and the spots are either pale yellow, white, cream, or a tawny orange. The speckled wood feeds on a variety of grass species. The males of this species exhibit two types of mate locating behaviors: territorial defense and patrolling. The proportion of males exhibiting these two strategies changes based on ecological conditions. The monandrous female must choose which type of male can help her reproduce successfully. Her decision is heavi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bombus Terrestris
''Bombus terrestris'', the buff-tailed bumblebee or large earth bumblebee, is one of the most numerous bumblebee species in Europe. It is one of the main species used in greenhouse pollination, and so can be found in many countries and areas where it is not native, such as Tasmania. Moreover, it is a eusocial insect with an overlap of generations, a division of labor, and cooperative brood care. The queen is monandrous which means she mates with only one male. ''B. terrestris'' workers learn flower colors and forage efficiently. Taxonomy and phylogenetics ''B. terrestris'' is part of the order Hymenoptera, which is composed of ants, bees, and wasps. The family Apidae specifically consists of bees. It is also part of the subfamily Apinae. There are 14 tribe lineages within Apinae, and ''B. terrestris'' is in the bumblebee tribe, Bombini. It is in the genus ''Bombus'', which consists entirely of bumblebees, and the subgenus ''Bombus sensu stricto''. This subgenus contains closely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green-veined White
The green-veined white (''Pieris napi'') is a butterfly of the family Pieridae. Appearance and distribution A circumboreal species widespread across Europe and Asia, including the Indian subcontinent, Japan, the Maghreb and North America. It is found in meadows, hedgerows and woodland glades but not as often in gardens and parks like its close relatives the large and small whites, for which it is often mistaken. Like other "white" butterflies, the sexes differ. The female has two spots on each forewing, the male only one. The veins on the wings of the female are usually more heavily marked. The underside hindwings are pale yellow with the veins highlighted by black scales giving a greenish tint, hence green-veined white. Unlike the large and small whites, it rarely chooses garden cabbages to lay its eggs on, preferring wild crucifers. Males emit a sex pheromone that is perceptible to humans, citral, the basic flavor-imparting component of lemon peel oil. Some authors consider th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drosophila Subobscura
''Drosophila subobscura'' is a species of fruit fly in the family Drosophilidae. Originally found around the Mediterranean, it has spread to most of Europe and the Near East. It has been introduced into the west coasts of Canada, the United States, and Chile. Its closest relative is '' Drosophila madeirensis'', found in the Madeira Islands, followed by '' D. guanche'', found in the Canary Islands. These three species form the ''D. subobscura'' species subgroup. When they mate, males and females perform an elaborate courtship dance, in which the female can either turn away to end the mating ritual, or stick out her proboscis in response to the male's, allowing copulation to proceed. ''D. subobscura'' has been regarded as a model organism for its use in evolutionary-biological studies. Description Both wild type and laboratory-reared individuals of ''D. subobscura'' are brown, with clear wings, yellow halters, yellowish legs, and red eyes. They do not exhibit sexual size dimor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orchidoideae
The Orchidoideae, or the orchidoid orchids, are a subfamily of the orchid family (Orchidaceae) that contains around 3630 species. Species typically have a single (monandrous), fertile anther which is erect and basitonic. Description The subfamily Orchidoideae and the previously recognized subfamily Spiranthoideae are considered the closest allies in the natural group of the monandrous orchids because of several generally shared characters: * a shared terrestrial habit * sectile (capable of being severed) or granular pollinia *erect anthers. Taxonomy Phylogeny of the Orchidoideae is volatile and still subject to change. Historically, the Orchidoideae have been partitioned into up to 6 tribes, including Orchideae, Diseae, Cranichideae, Chloraeeae, Diurideae, and Codonorchideae. However, the most recent molecular phylogenetics analysis led by Chase et al. in 2015 and subsequently by Chen et al. in 2017 indicates that the Orchidoideae should be split into 4 tribes: the Orchide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vanilloideae
Vanilloideae is one of the subfamilies of orchids belonging to the large family Orchidaceae. Lindley (1836) and Garay (1986)Garay,L. (1986), Olim Vanillaceae. Botanical Museum Leaflets. Harvard University 30 : 233-237. treated it as a separate family, Vanillaceae. But their single, incumbent anther and poorly organised pollinia led to their recognition as at best a subgroup of monandrous orchids. From a molecular point of view, this clade is rather a sister to subfamily Epidendroideae and subfamily Orchidoideae in the Orchidaceae, and thus it is today also considered a subfamily. The subfamily Vanilloideae consists of 15 genera and about 180 species, belonging to the tribes Pogonieae and Vanilleae. Their distribution is pantropical, throughout Asia, Australia and the Americas. The species in the tribe Pogonieae have a characteristic laciniate lip margin. The color of their petals and sepals is pink or rarely white or bluish. Their sepals have an oblong, elliptic, or narrowly la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epidendroideae
Epidendroideae is a subfamily of plants in the orchid family, Orchidaceae. Epidendroideae is larger than all the other orchid subfamilies together, comprising more than 15,000 species in 576 genera. Most epidendroid orchids are tropical epiphytes, typically with pseudobulbs. There are, however, some terrestrials such as ''Epipactis'' and even a few myco-heterotrophs, which are parasitic upon mycorrhizal fungi. They typically contain the remaining orchids with a single, fertile anther ( = monandrous), which is also fully incumbent ( = strongly convex) to suberect (= ascending towards the edges). The anther form arises from column elongation or, as in the vandoids, from early anther bending. The incumbent anther forms a right angle with the column axis or is pointed backward in many genera. Most have hard pollinia, i.e. a mass of waxy pollen or of coherent pollen grains. The pollinia are with caudicle and viscidium or without. The stigma are entire or three-lobed; a beak is prese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apostasioideae
Apostasioideae is one of the five subfamilies recognised within the orchid family, Orchidaceae. Only two genera, '' Neuwiedia'' and ''Apostasia'', and 15 species, are recognised within the Apostasioideae in contrast to the other orchid subfamilies which are highly species rich. The Apostasioideae are generally considered a basal lineage within the orchids based on molecular data and flower structure. All other orchid subfamilies with the exception of the Cypripedioideae are monandrous (possessing a single stamen), however Apostasioid orchids have 3 stamens. As with all basal or 'primitive' groups, extant Extant is the opposite of the word extinct. It may refer to: * Extant hereditary titles * Extant literature, surviving literature, such as ''Beowulf'', the oldest extant manuscript written in English * Extant taxon, a taxon which is not extinct, ... species within Apostasioideae do not represent direct ancestors of the other subfamilies, they simply share the same common anc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orchid
Orchids are plants that belong to the family Orchidaceae (), a diverse and widespread group of flowering plants with blooms that are often colourful and fragrant. Along with the Asteraceae, they are one of the two largest families of flowering plants. The Orchidaceae have about 28,000 currently accepted species, distributed in about 763 genera. (See ''External links'' below). The determination of which family is larger is still under debate, because verified data on the members of such enormous families are continually in flux. Regardless, the number of orchid species is nearly equal to the number of bony fishes, more than twice the number of bird species, and about four times the number of mammal species. The family encompasses about 6–11% of all species of seed plants. The largest genera are ''Bulbophyllum'' (2,000 species), ''Epidendrum'' (1,500 species), ''Dendrobium'' (1,400 species) and ''Pleurothallis'' (1,000 species). It also includes ''Vanilla'' (the genus of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bombus Pratorum
The early bumblebee or early-nesting bumblebee (''Bombus pratorum'') is a small bumblebee with a wide distribution in most of Europe and parts of Asia. It is very commonly found in the UK and emerges to begin its colony cycle as soon as February which is earlier than most other species, hence its common name. There is even some evidence that the early bumblebee may be able to go through two colony cycles in a year. Like other bumblebees, ''Bombus pratorum'' lives in colonies with queen and worker castes. ''Bombus pratorum'' queens use aggressive behavior rather than pheromones to maintain dominance over the workers! Description and identification The queen is black with a yellow collar (the band around the front of the thorax), another yellow band on the first tergite (abdominal segment), and red colouration on the tail (terga 5 and 6). The male has a wider yellow collar, yellow colouration on both terga 1 and 2, and a red tail, also. The workers are similar to the queen, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plebeia Remota
''Plebeia remota'' is a species of stingless bee that is in the family Apidae and tribe Meliponini. Bees of the species are normally found in a few states in southern Brazil and their nests can be found in tree cavities. Depending on the region, ''P. remota'' may have a different morphology and exhibit different behaviors. The bee's diet consists of nectar and pollen that are collected intensely from a few sources. Researchers have conducted a multitude of studies analyzing the changes that occur in the colony during reproductive diapause and what happens during the provisioning and oviposition process or POP. Taxonomy and phylogeny ''P. remota'' is a member of the order Hymenoptera, which is the insect order comprising bees, wasps and ants. Within Hymenoptera, it belongs to the family Apidae. This bee belongs in the tribe Meliponini. The greatest number of Meliponini species reside in the Neotropics where there are about 420 species known. Within the genus ''Plebeia'', there are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PubMed Identifier
PubMed is a free search engine accessing primarily the MEDLINE database of references and abstracts on life sciences and biomedical topics. The United States National Library of Medicine (NLM) at the National Institutes of Health maintain the database as part of the Entrez system of information retrieval. From 1971 to 1997, online access to the MEDLINE database had been primarily through institutional facilities, such as university libraries. PubMed, first released in January 1996, ushered in the era of private, free, home- and office-based MEDLINE searching. The PubMed system was offered free to the public starting in June 1997. Content In addition to MEDLINE, PubMed provides access to: * older references from the print version of ''Index Medicus'', back to 1951 and earlier * references to some journals before they were indexed in Index Medicus and MEDLINE, for instance ''Science'', ''BMJ'', and ''Annals of Surgery'' * very recent entries to records for an article before it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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