Rock Scarlet, Crocothemis divisa, Rorsblossie

100 3244 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 15

100 3239 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 2

 

Short Description

Rock Scarlet, Crocothemis divisa, Rorsblossie is medium sized with a distinctive grey brown thorax and red abdomen and yellow face

Family Libellulidae Leach, 1815

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Key identification features

Male

  • Frons above and top of head yellowish brown. 100 3541 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 24  Antifrons yellow. Labrum creamy  yellow gena light creamy white.
  • Eyes deep red cap above, light greyish blue below.  100 3539 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 21
  • Thorax dark dull red above, greyish reddish brown at sides, darkening to grey with age.100 3536 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 9 Black marks present between wing bases. 100 3544 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 33  Antihumeral stripe area reddish along the dorsal carina becoming grey/brown towards the humeral stripe. May have a light grey line along the metapleural suture 
  • Wings clear but may have a slight darkening amber, without basal amber patches, at most with yellow wash along hindwing membranule that does not extend beyond Cux (cubital cross-vein(s).100 3545 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 35 This amber wash is almost invisible in the field. 100 3544 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 33  Pterostigmas reddish brown, 4.0–4.4 mm being exceptionally long.  100 3546 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 34
  • Abdomen long, fairly slender tapering gradually from approximately s 5 to a narrow s 10. Long slender appendages, yellowish when young becoming pinkish red. Small  shallow triangular marks on s 4 - 6 with indistinct marks on s 3 and s 7 that may become visible with age  100 3543 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 28 Segment 4 dorsal vie with distinct dark patch 100 3547 Crocothemis divisa Rock Scarlet Male Vaalwater LP RSA Mch 2021r 31

Female:

  • Female brownish.
  • Thorax mid brow and pale brown at sides. May have a light grey line along the metapleural suture
  • Wings without basal wing patches, pterostigmas reddish brown and long.
  • Abdomen becomes reddish pink with age similar to male 

 Habitat

  • Pools in/or next to rocky streams in open landscapes or sometimes open areas in forest. Often with rocks. From 0 to 2000 m above sea level, but mostly below 1500.

Behaviour:

  •  It is alert as it perches mostly on rocks. at pools or near rapids hunting upstream 

Compared with other species:

Male

  • Male is similar to c. saxicolor  by the yellow-ream to light brown face and clear wing bases
  • C. divisa has a distinct yellow face C. erythraea and C. sanguinolenta has red faces.
  • C sanguinolenta h flat triangular stripes on the side of the abdomen C. divisa also has the marks BUT not as accentuated. C. erythraea. has no marks on the side of the abdomen
  • Male and female C. Erythraea and C. sanguinolenta has smallish amber marks in wings C. divisa virtually no amber marks 
  • C erythraea abdomen broad. C sanguinolenta more slender and s 7 - s10 tapers to narrow end at claspers. C. Divisa tapers gradually toward s 10 from approximately s4 giving it a long slender look 
  • Black marks along the abdominal carina indistinct on C. divisa Well defines on male C. erythraea and C sanguinolenta

Female

  • Female C. Erythraea and C. sanguinolenta have smallish amber marks in wings C. divisa virtually no amber marks 
  • Black marks along the abdominal carina distinct on C. divisa. Well defines on  C. erythraea and with the marks on C sanguinolenta spear point like 
  • C erythraea abdomen broad. C sanguinolenta more slender and s 7 - s10 tapers to narrow end at claspers C. Divisa tapers gradually towsd s 10 from approximately s4 giving it a long slender look 
Related Species
Distribution

Crocothemis divisa Rock Scarlet Distribution Map Mch 2021Distribution Map
South Africa

Physical Map South Africa Physical Map
South Africa

Political Map South africa Political Map
South Africa

Crocothemis divisa Rock Scarlet Africa Distribution Map Oct 2021Distribution
Map Africa

Physical Map AfricaPhysical Map
Africa

Political Map AfricaPolitical Map
Africa

 

 

South Africa

  •  Limpopo Province Waterberg region and north eastern Mpumalanga Province area (1 record)

 Africa

  •  Widespread south of the Sahara
  • Angola; Benin; Botswana; Burkina Faso; Côte d'Ivoire; Cameroon; Democratic Republic of the Congo; Equatorial Guinea; Gabon; Gambia; Ghana; Guinee-Bissau; Liberia; Malawi; Mozambique; Namibia; Niger; Nigeria; Republic of Guinea; Republic of South Africa; Senegal; Sierra Leone; South Sudan; Sudan; Tanzania; Togo; Uganda; Zambia; Zimbabwe
Further Reading 

Websites

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