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Morphological identification of Lucilia sericata, Lucilia cuprina and their hybrids (Diptera, Calliphoridae).

Williams KA, Villet MH - Zookeys (2014)

Bottom Line: Discriminant function analysis of the characters successfully separated the specimens into three unambiguous groups - L. sericata, L. cuprina and hybrids.This is the first evidence that hybrids of these two species can be identified from their morphology.The usefulness of the morphological characters is also discussed and photographs of several characters are included to facilitate their assessment.

View Article: PubMed Central - HTML - PubMed

Affiliation: Entomology Department, Durban Natural Science Museum, Durban, South Africa.

ABSTRACT
Hybrids of Lucilia sericata and Lucilia cuprina have been shown to exist in previous studies using molecular methods, but no study has shown explicitly that these hybrids can be identified morphologically. Published morphological characters used to identify L. sericata and L. cuprina were reviewed, and then scored and tested using specimens of both species and known hybrids. Ordination by multi-dimensional scaling indicated that the species were separable, and that hybrids resembled L. cuprina, whatever their origin. Discriminant function analysis of the characters successfully separated the specimens into three unambiguous groups - L. sericata, L. cuprina and hybrids. The hybrids were morphologically similar irrespective of whether they were from an ancient introgressed lineage or more modern. This is the first evidence that hybrids of these two species can be identified from their morphology. The usefulness of the morphological characters is also discussed and photographs of several characters are included to facilitate their assessment.

No MeSH data available.


Ordination plot of the first two roots of the discriminant function analysis using seven characters. Ellipses represent 95% confidence regions. Light blue solid circles = Lucilia sericata, Green open circles = Lucilia cuprina, dark blue squares = introgressed hybrids, purple triangles = modern hybrids.
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Figure 7: Ordination plot of the first two roots of the discriminant function analysis using seven characters. Ellipses represent 95% confidence regions. Light blue solid circles = Lucilia sericata, Green open circles = Lucilia cuprina, dark blue squares = introgressed hybrids, purple triangles = modern hybrids.

Mentions: However, the ordination plot of the DFA (Figure 7) clearly shows three groups – Lucilia sericata, Lucilia cuprina and hybrids. The most influential characters were the number of setae on the scutellum (Root 1) and the number of hairs on the humeral callus (Root 2) (Table 3). It is not obvious in the morphology that there is a difference between the pure and hybrid strains, but statistically one can separate the hybrids from the pure Lucilia cuprina specimens.


Morphological identification of Lucilia sericata, Lucilia cuprina and their hybrids (Diptera, Calliphoridae).

Williams KA, Villet MH - Zookeys (2014)

Ordination plot of the first two roots of the discriminant function analysis using seven characters. Ellipses represent 95% confidence regions. Light blue solid circles = Lucilia sericata, Green open circles = Lucilia cuprina, dark blue squares = introgressed hybrids, purple triangles = modern hybrids.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4109482&req=5

Figure 7: Ordination plot of the first two roots of the discriminant function analysis using seven characters. Ellipses represent 95% confidence regions. Light blue solid circles = Lucilia sericata, Green open circles = Lucilia cuprina, dark blue squares = introgressed hybrids, purple triangles = modern hybrids.
Mentions: However, the ordination plot of the DFA (Figure 7) clearly shows three groups – Lucilia sericata, Lucilia cuprina and hybrids. The most influential characters were the number of setae on the scutellum (Root 1) and the number of hairs on the humeral callus (Root 2) (Table 3). It is not obvious in the morphology that there is a difference between the pure and hybrid strains, but statistically one can separate the hybrids from the pure Lucilia cuprina specimens.

Bottom Line: Discriminant function analysis of the characters successfully separated the specimens into three unambiguous groups - L. sericata, L. cuprina and hybrids.This is the first evidence that hybrids of these two species can be identified from their morphology.The usefulness of the morphological characters is also discussed and photographs of several characters are included to facilitate their assessment.

View Article: PubMed Central - HTML - PubMed

Affiliation: Entomology Department, Durban Natural Science Museum, Durban, South Africa.

ABSTRACT
Hybrids of Lucilia sericata and Lucilia cuprina have been shown to exist in previous studies using molecular methods, but no study has shown explicitly that these hybrids can be identified morphologically. Published morphological characters used to identify L. sericata and L. cuprina were reviewed, and then scored and tested using specimens of both species and known hybrids. Ordination by multi-dimensional scaling indicated that the species were separable, and that hybrids resembled L. cuprina, whatever their origin. Discriminant function analysis of the characters successfully separated the specimens into three unambiguous groups - L. sericata, L. cuprina and hybrids. The hybrids were morphologically similar irrespective of whether they were from an ancient introgressed lineage or more modern. This is the first evidence that hybrids of these two species can be identified from their morphology. The usefulness of the morphological characters is also discussed and photographs of several characters are included to facilitate their assessment.

No MeSH data available.