Chalarus argenteus Coe, 1966

Kehlmaier, Christian & Assmann, Thorsten, 2008, The European species of Chalarus Walker, 1834 revisited (Diptera: Pipunculidae), Zootaxa 1936, pp. 1-39 : 18

publication ID

https://doi.org/ 10.5281/zenodo.184950

DOI

https://doi.org/10.5281/zenodo.5622198

persistent identifier

https://treatment.plazi.org/id/367D87D6-FFD3-8D65-FF78-FCBAFD0EE7E0

treatment provided by

Plazi

scientific name

Chalarus argenteus Coe, 1966
status

 

Chalarus argenteus Coe, 1966 View in CoL

Chalarus argenteus Coe, 1966: 156 View in CoL .

Diagnosis: Male unknown. Female with frontal facets moderately enlarged (J92 Fig. 2 View FIGURES 1 – 6 A); frons at narrowest point 1.2–1.5 times diameter of largest frontal facet; flagellum dark brown; legs entirely dark brown; pulvilli of all legs of same size, shorter than distitarsus; hairs on femora light to mid brown in holo- and paratype; hairs on thorax and abdomen mid to dark brown; posterior/posterodorsal hair fringe on mid femora ( Fig. 79 View FIGURES 79 – 80 ); hind femur with apical hairs of pdsr extending as far as apex; abdominal tergites dark brown; ovipositor as in Figs 65–66 View FIGURES 63 – 75 . No DNA barcode could be obtained.

Annotations: The holotype and the paratype of C. argenteus were obtained for study, as was the only reared specimen (ex. Typhlocyba quercus ) mentioned in Jervis (1992). The abdomen of the holotype was removed in order to enable a detailed study of the shape of the ovipositor ( Fig. 66 View FIGURES 63 – 75 ). Unfortunately, the ovipositor suffered deformation in this process but its shape is still discernible. In the past, the ovipositor of the paratype was dissected and placed in canada balsam. Today, the embedding medium is partly chipped off and the ovipositor lost. Based on adult morphology, C. argenteus strongly resembles C. spurius but normally has a slightly shorter and straighter tergite 9 (ovipositor’s piercer), a slightly narrower frons and a slightly longer, paler and more strongly curved posterior/posterodorsal hair fringe on mid femora (compare Figs 79–80 View FIGURES 79 – 80 ). Jervis (1992 & in litt.) provides convincing larval/pupal evidence for an independence of the taxon by comparing the shape of the mandibles of second instar larva of C. argenteus and C. spurius (J92 Figs 38 View FIGURES 34 – 48 E & Q–R) and the posterior spiracular plate of fully grown larva/puparium (J92 Figs 40 View FIGURES 34 – 48 B & 42E). Both features clearly differ from each other — note that the upper margin of the posterior spiracular plate of C. argenteus is partly covered with debris and hence not clearly visible.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Pipunculidae

Genus

Chalarus

Loc

Chalarus argenteus Coe, 1966

Kehlmaier, Christian & Assmann, Thorsten 2008
2008
Loc

Chalarus argenteus

Coe 1966: 156
1966
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