Caenoura annulitarsis (Loew, 1858), 2002

Londt, Jason G. H., 2020, A survey of grassland Asilidae (Diptera) at Jacana Eco Estate, Hilton, South Africa, African Invertebrates 61 (1), pp. 29-48 : 29

publication ID

https://dx.doi.org/10.3897/AfrInvertebr.61.50895

publication LSID

lsid:zoobank.org:pub:4B0D3924-3E01-4D3A-9EDC-F6CBA335159F

persistent identifier

https://treatment.plazi.org/id/3A23AE1D-BBFD-5A76-9EB4-358E39306AE0

treatment provided by

African Invertebrates by Pensoft

scientific name

Caenoura annulitarsis (Loew, 1858)
status

 

4. Caenoura annulitarsis (Loew, 1858) Fig. 4 View Figures 4–13

Remarks.

This fairly widely-distributed grassland species was reviewed by Londt (2002a). Found mainly in KwaZulu-Natal, the species has also been recorded from the surrounding provinces of Eastern Cape, Free State and Mpumalanga, as well as the neighbouring countries of Lesotho and Zimbabwe. Londt (2002a) gives adult activity data that includes all months from November to May, based mainly on material gathered during a grassland survey undertaken in 2000 at Queen Elizabeth Park (29°34'S, 30°19'E) in Pietermaritzburg ( Londt 2002b).

At Jacana, adults of this species were encountered in low numbers on week five of the survey. By week eight, numbers had increased and by week 11, the species was considered abundant. Numbers began to decline from week 16 and the species had disappeared by week 21; the total flight period of adults being 16 weeks. The species was more commonly encountered in the upper field.

This relatively small species was invariably swept from grass with very few actually being sighted. None were encountered mating or with prey. The species appears to be largely confined to Londt’s (1994) ecological category 4a (within grass).

Table 4 View Table 4 provides a comparison of flight periods with those recorded from Queen Elizabeth Park ( Londt 2002b). Adults were encountered at approximately the same time of year, but flight periods ranged from 16 weeks at Jacana to 25 weeks at Queen Elizabeth Park.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Asilidae

Genus

Caenoura