speciation

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spe·ci·a·tion

(spē'shē-ā'shŭn),
The evolutionary process by which diverse species of animals or plants are formed from a common ancestral stock.

speciation

(spē′shē-ā′shən, -sē-)
n.
The formation of new biological species through the process of evolution.

spe′ci·ate′ v.
spe′ci·a′tion·al adj.

spe·ci·a·tion

(spē'shē-ā'shŭn)
The evolutionary process by which diverse species of animals or plants are formed from a common ancestral stock.

speciation

the process by which new species are formed. Speciation occurs when gene flow has effectively ceased between populations where it previously existed and is brought about by ISOLATING MECHANISMS.see GEOGRAPHICAL ISOLATION.
References in periodicals archive ?
This may explain why this lineage did not rapidly speciate like the other two in the clade.
"The only way to make it [to Hawaii] was to have your ancestors blown in and then speciate from there," Hoy says.
The present study was conducted to speciate candida isolates from clinical specimens and to study their adherence to urinary catheter material and also to test the isolates for biofilm production.
gordonae isolates; during 1998-2007, high-performance liquid chromatography was used to speciate others; thereafter, DNA probes (AccuProbe and GenoType line-probe assays [Hain Lifescience GmbH, Nehren, Germany]) were used.
Also, we used GenoType[R] Mycobacterium common mycobacteria assay (Hain Lifescience, GmBH, Nehren, Germany) that could identify and speciate only 26 NTM strains of the 38 NTM that were isolated.
For instance at a medical college in Vellore India the prevalence of non-albicans candiduria was reported to be as high as 81%.6 At a general hospital in RibeirAPound o Preto Brazil a study reported non-albicans candiduria prevalence of 64%.7 Likewise non-albicans Candida predominated (accounting for 58% of all Candida isolates) in urine samples of renal transplant recipients from a university hospital in Madison USA.8 Many clinical laboratories in Malaysia do not speciate the Candida isolated from urine samples unless specifically requested.
(8) In our study, Staphylococcus species was the most common isolate; however, OmniLog failed to speciate it in 21 of 28 (75%) colonies.
At initiation of ART Follow-up blood results Date 02/2013 08/2013 09/2013 Sputum microscopy Not done AFB seen (+++) Scanty AFB Sputum GeneXpert Not done MTB detected, Not used for sensitive to follow-up Lymph node aspirate rifampicin Microscopy TB PCR Culture CD4 count (cells/ 63 172 201 [mm.sup.3]) HIV viral load 124 Not detected (copies/mL) Date 03/2014 Sputum microscopy No AFB seen Sputum GeneXpert Not used for follow-up Lymph node aspirate Microscopy AFB seen TB PCR MTB not detected Culture NTM isolated, unable to speciate CD4 count (cells/ 231 [mm.sup.3]) HIV viral load Not detected (copies/mL) TABLE 3: Showing baseline and follow-up blood results.
The fact that we did not speciate urinary mercury to determine whether methylmercury or inorganic mercury was the main species that increased following DMSA chelation prevented us from determining which species accounted for the increased excretion in fish-eating groups.
The aim of this study was to speciate clinical isolates of Acinetobacter, analyze their resistance patterns, identify the production ESBLs and compare the role of different cephalosporins in detecting ESBL production in the isolates.
More problematic is the regrettable tendency of clades to speciate in bursts.