Lecanodiaspis, Targioni Tozzetti, 1869

Hodgson, Chris, 2020, A review of neococcid scale insects (Hemiptera: Sternorrhyncha: Coccomorpha) based on the morphology of the adult males, Zootaxa 4765 (1), pp. 1-264: 196

publication ID

http://doi.org/ 10.11646/zootaxa.4765.1.1

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:C442D94C-0EB4-4509-B762-913707214819

DOI

http://doi.org/10.5281/zenodo.3796880

persistent identifier

http://treatment.plazi.org/id/03B2EA64-0AEC-4691-2CFC-FDABFE5DD0BA

treatment provided by

Carolina

scientific name

Lecanodiaspis
status

 

Key to adult male Lecanodiaspis   species (based on the published description of the above 9 species).

1. Hamulohalteres absent. Postoccipital ridge transverse, without posterior extensions laterally.............. L. brabei Brain  

- Hamulohalters present. Postoccipital ridge with posterior extensions laterally (apart from L. elytropappi   )............... 2

2. Small simple pores present in a group on dorsal surface of head near each scape. Preocular ridges meeting medially. Postoccipital ridge with long posterior arms.................................................... L. baculifera Leonardi  

- Small simple pores absent on dorsal surface of head. Preocular ridges not nearly meeting medially. Postoccipital ridge with only short posterior arms................................................................................... 3

3. Postoccipital ridge without lateral posterior extensions. Median prosternal ridge present. Dorsal head setae present. Metapre- coxal ridge absent................................................ L. elytropappi Munting & Giliomee   ( Fig. 75 View FIGURE 75 )

- Postoccipital ridge with lateral posterior extensions. Other characters not in this combination......................... 4

4. Genal tubercles present................................................................................ 5

- Genal tubercles absent................................................................................. 8

5. Metaprecoxal ridge present. Tegular setae absent......................................... L. rufescens (Cockerell)  

- Metaprecoxal ridge absent. Tegular setae present............................................................ 6

6. Ventral head setae present................................................... L. hodgsoni Howell & Koszatarab  

- Ventral head setae absent............................................................................... 7

7. With 0 or 1 pairs of dorsal head setae. Prosternal median ridge absent................. L. varioseta Howell & Kosztarab  

- With 3+ pairs of dorsal head setae. Prosternal median ridge present..................... L. africana Newstead   ( Fig. 76 View FIGURE 76 )

8. Dorsal pleural setae absent from abdominal segment I. Cranial apophysis comparatively long, reaching level of ventral simple eyes. Cranial apophysis with 3 apical branches.............................................. L. acacia (Maskell)  

- Dorsal pleural setae present on abdominal segment I. Cranial apophysis comparatively short, not reaching level of ventral simple eyes. Cranial apophysis bifurcate..................................................... L. anomala Green  

Notes: 1. Ocelli, when present, are located on all male Coccomorpha   on or near the posterior margin of the ocular sclerite and are considered to be absent on adult male Lecanodiaspis   sp. Amin et al. (1976) show the ocelli as present in the middle of the gena in their figures and describe them in their text as being on the gena. The position of the ocelli in their figures clearly equates to the dermal tubercle found on other lecanodiaspids by Afifi and Kosztarab (1969). Note that some Chionaspididae also have a genal spot. Whether these are homologous is unknown.

2. Unfortunately, the figures in Amin et al. (1976) are all incorrectly labelled! Thus their Fig. 1 View FIGURE 1 , labelled L. baculifera   , is in fact of L hodgsoni   ; Fig. 2 View FIGURE 2 , labelled L. hodgsoni   , is in fact of L. rufescens   ; Fig. 3 View FIGURE 3 , labelled L. rufescens   , is in fact of L. varioseta   , and Fig. 4 View FIGURE 4 , labelled L. varioseta   , is of L. baculifera   .

3. Because, in many cases, the number of specimens studied for the descriptions from which the above data was taken was few, the variance and therefore the taxonomic significance of some of these character-states is uncertain.

Comment. Of the 12 genera currently included in the Lecanodiaspididae   , adult males of only Lecanodiaspis   have been described. These are all very similar and, as the above key suggests, only differ in a few small particulars. As examples of adult male lecanodiaspids, L. africana Newstead   and L. elytroppapi Munting & Giliomee   are here illustrated ( Figs 75 View FIGURE 75 , 76 View FIGURE 76 ).