Sable Cruiser (Phyllomacromia monoceros)

View the above photo record (by Gert Bensch) in OdonataMAP here.

Find the Sable Cruiser in the FBIS database (Freshwater Biodiversity Information System) here.

Family Macromiidae

Phyllomacromia monoceros SABLE CRUISER

Identification

Large size

Length reaches 62mm; Wingspan attains 84mm.

Most similar to the two other Phyllomacromia species in the region, the Darting Cruiser (Phyllomacromia pictus) and the Two-banded Cruiser (Phyllomacromia contumax).

The Sable Cruiser can be identified by its predominantly black abdomen that shows only a few scattered yellow markings. There is a larger yellow ring on segment 7. The sides of the thorax show bold yellow and black bands. This is similar to that of Phyllomacromia pictus, but differs from the plain black thorax of Phyllomacromia contumax.

Males have a diagnostic vertical spine on the tenth abdominal segment.

Click here for more details on identification of the Sable Cruiser.

Phyllomacromia monoceros – Female
Nwanedi Nature Reserve, Limpopo
Photo by John Wilkinson

Habitat

Associated with forested habitats where it frequents rivers and streams. Often found hunting in nearby clearings or over wetlands at the forest edge.

Behaviour

Most often encountered in flight. Patrols back and forth along a regular route. The flight is fast and powerful. Hangs from a perch when at rest.

Most active from September to January (see Phenology below).

Status and Conservation

Rare and localised. Listed as Vulnerable in the IUCN Red List of Threatened Species.

Distribution

Phyllomacromia monoceros has a disjunct distribution and occurs in Eastern and Southern Africa. It is found from Kenya in the North down to the Northern Parts of South Africa.

In South Africa the Sable Cruiser has been recorded at several scattered localities along the escarpment in the Limpopo and Mpumalanga provinces.

Below is a map showing the distribution of records for Sable Cruiser in the OdonataMAP database as at February 2020.

The next map below is an imputed map, produced by an interpolation algorithm, which attempts to generate a full distribution map from the partial information in the map above. This map will be improved by the submission of records to the OdonataMAP section of the Virtual Museum.

Ultimately, we will produce a series of maps for all the odonata species in the region. The current algorithm is a new algorithm. The objective is mainly to produce “smoothed” maps that could go into a field guide for odonata. This basic version of the algorithm (as mapped above) does not make use of “explanatory variables” (e.g. altitude, terrain roughness, presence of freshwater — we will be producing maps that take these variables into account soon). Currently, it only makes use of the OdonataMAP records for the species being mapped, as well as all the other records of all other species. The basic maps are “optimistic” and will generally show ranges to be larger than what they probably are.

These maps use the data in the OdonataMAP section of the Virtual Museum, and also the database assembled by the previous JRS funded project, which was led by Professor Michael Samways and Dr KD Dijkstra.

Phenology

Dragonfly Atlas: Megan Loftie-Eaton, Sally Hofmeyr, Ryan Tippett & Les Underhill
Dragonfly Atlas: Megan Loftie-Eaton, Sally Hofmeyr, Ryan Tippett & Les Underhill
Megan Loftie-Eaton is our communications, social media and citizen science coordinator. Prior to her work for the BDI, she coordinated OdonataMAP, the Atlas of African Odonata. Sally Hofmeyr has many years' experience in the academic world, writing her own material and editing the work of others. Her academic background is in the natural sciences: her PhD and first postdoc in ornithology and environmental change (Animal Demography Unit, University of Cape Town). Ryan Tippett is an enthusiastic contributor to Citizen Science and has added many important and interesting records of fauna and flora. He has been a member of the VMU since 2014 and has currently submitted over 11000 records. He is also on the expert identification panel for the Odonata Map project. Prof Les Underhill has been Director of the Animal Demography Unit (ADU) at the University of Cape Town since it started in 1991. Although citizen science in biology is Les’s passion, his academic background is in mathematical statistics.