Margarodes Guilding
publication ID |
https://doi.org/ 10.11646/zootaxa.5105.3.1 |
publication LSID |
lsid:zoobank.org:pub:187B04D7-4C35-4E27-9B2D-A616BF59F380 |
DOI |
https://doi.org/10.5281/zenodo.6343171 |
persistent identifier |
https://treatment.plazi.org/id/03D687D0-FFA1-9856-19E8-CC29FA2EE5F7 |
treatment provided by |
Plazi |
scientific name |
Margarodes Guilding |
status |
|
Genus Margarodes Guilding View in CoL View at ENA
Margarodes is a genus of 29 species, 14 of which have been recorded from continental Africa. The immature cyst stages ( Fig. 6A View FIGURE 6 ) feed on roots and are known as “ground pearls”; they have pores in the spiracular atria. Several species are pests in vineyards in southern Africa.
Field key to soil-dwelling cysts of pest Margarodes on grapevines in southern Africa, derived from de Klerk et al. (1982) and de Klerk (2017)}
1(0) Cyst soft and white, no more than 2.5 mm in diameter, subspherical........................................ greeni View in CoL
- Cyst hard and yellow to bronze, more than 3.5 mm in diameter, ovoid or subspherical.............................. 2
2(1) Cyst wall smooth, yellow to bronze with a metallic lustre, ovoid........................................... trimeni View in CoL
- Cyst wall textured, dull yellow or brown, subspherical........................................................ 3
3(2) Cyst wall with a bark-like texture, light brown........................................................ capensis View in CoL
- Cyst wall warty or with a raised reticulated pattern, dull yellow or light to dark brown.............................. 4
4(3) Cyst wall warty, light to dark brown; up to 8.6 mm in diameter...................................... vredendalensis View in CoL
- Cyst wall with a raised reticulate pattern, dull yellow; up to 6.0 mm in diameter.......................... prieskaensis View in CoL
Key to slide-mounted cysts of six species of Margarodes in southern Africa, based on de Klerk et al. (1983)
1(0) Abdominal spiracles numbering 6 pairs. Derm around labium without multilocular pores............................ 2
- Abdominal spiracles numbering 7 pairs. Derm around labium with multilocular pores............................... 3
2(1) Cyst with metallic lustre. Maximum body diameter about 6.0 mm......................................... trimeni View in CoL
- Cyst without metallic lustre. Maximum body diameter about 2.5 mm ....................................... greeni View in CoL
3(1) Thoracic spiracles associated with multilocular pores on surrounding derm............................. upingtonensis View in CoL
- Thoracic spiracles not associated with multilocular pores...................................................... 4
4(3) Ventral cicatrices present between abdominal spiracles on segment V and anal opening............. prieskaensis View in CoL ( Fig. 6A View FIGURE 6 )
- Ventral cicatrices absent from area between abdominal spiracles on segment V and anal opening, but present between posteriormost abdominal spiracles and anal opening............................................................... 5
5(1) Cicatrices numbering fewer than 10, present in pairs................................................... capensis View in CoL
- Cicatrices numbering more than 10, present in pairs and singly...................................... vredendalensis View in CoL
Key to slide-mounted adult females of ten species of Margarodes in southern Africa, based on de Klerk et al. (1983)
1(0) Abdominal spiracles numbering 8 pairs............................................................... pilosus View in CoL
- Abdominal spiracles numbering 6 or 7 pairs only............................................................ 2
2(1) Abdominal spiracles numbering 7 pairs.................................................................... 3
- Abdominal spiracles numbering 6 pairs.................................................................... 6
3(2) Posterior end of abdomen with bulbous spines.............................................. prieskaensis View in CoL ( Fig. 6 View FIGURE 6 )
- Posterior end of abdomen without bulbous spines............................................................ 4
4 (3) Ventral setae long, each measuring 380‒490 µm.................................................. vredendalensis View in CoL
- Ventral setae short, each measuring 108‒194 µm............................................................ 5
5(4) Multilocular pores restricted to metathorax and head. Spines present over entire thorax........................ capensis View in CoL
- Multilocular pores present over entire body. Spines absent from prothorax, present on meso- and metathorax.. upingtonensis View in CoL
6(2) Abdominal venter with multilocular pores.................................................................. 7
- Abdominal venter without multilocular pores........................................................... ruber View in CoL
7(6) Multilocular pores present over entire body................................................................. 8
- Multilocular pores absent from both surfaces of head and prothorax, present on other parts of body.................... 9
8(7) With both surfaces of thorax and abdomen densely covered with spines.................................. newsteadi View in CoL
- Dorsal medial area without spines; marginal and medial areas of ventral metathorax and abdomen with low-density spine covering............................................................................................ greeni View in CoL
9(7) Mid- and hind-leg claws each long (182‒201 µm), only slightly curved, with inner surface smooth................ trimeni View in CoL
- Mid- and hind-leg claws each short (71‒100 µm) and strongly curved, with inner surface rough............... peringueyi View in CoL
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
|
Phylum |
|
Class |
|
Order |
|
Family |