| T O P I C R E V I E W |
| Francesco |
Posted - 21/04/2013 : 16:56:54
By knowing the interest (and the big confusion in the identification) in this genus, I provide a key to the African Xystrocera.
The possibility to insert new pictures or to improve the already written key with distribution and biology will allow having a more and more complete guide... thank to your help! 
In the next time, we can hopefully change the title in "Key to the genus Xystrocera" also including Asian species.
So, I suggest you to periodically check this guide, since new updates could have been added.
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| 15 L A T E S T R E P L I E S (Newest First) |
| pierre22 |
Posted - 13/10/2017 : 07:25:08
Merci Francesco pour cette clé super intéressante et très bien décrite sur cette espèce
Je vais me régaler à l'étudier
Pierre |
| Francesco |
Posted - 29/04/2013 : 22:35:37
quote:
Originally posted by horshehden
Good idea!
However, which group is X. villiersi Breuning & Teocchi 1972? 
It is synonym of Xystrocera marginipennis Murray, 1870 |
| horshehden |
Posted - 26/04/2013 : 21:05:04
Good idea!
However, which group is X. villiersi Breuning & Teocchi 1972? |
| Francesco |
Posted - 21/04/2013 : 21:23:04
Group 4f
- 1 Antennomere III spined ... Xystrocera buquetii Thomson, 1858
Distribution: Gabon
Drawing James Thomson
- - Antennomere III normal ... 2
- 2 Eastern species ... 3
- - Western species ... 4
- 3 Scape red... Xystrocera bomfordi Veiga-Ferreira, 1971
Distribution: Mozambique
Photo Patrick G.
- - Scape black
Distribution: Tanzania
- -Xystrocera orientalis Breuning, 1961
- -Xystrocera cyanipennis Breuning, 1957
- 4 Elytra with feeble metallic reflections ...Xystrocera lujae Hintz, 1911 (Holotype here)
Distribution: Zaire, Angola
Photo Carlo Vitali
- - Elytra with strong metallic reflections... 5
- 5 Elytra granulose ... 6
- - Elytra punctured ... 8
- 6 Antennae red ... Xystrocera conradti Breuning, 1957
Distribution: Togo
Photo Dominique Poirier-Ducrocq
- -Antennae black; scape sometimes red ... 7
- 7 Femurs red at apex ... Xystrocera femorata Chevrolat, 1855
Distribution: Guinea, Sierra Leone, Liberia, Ivory Coast, Ghana, Togo, Nigeria, Cameroon
Photo Laurent Péru
- - Femurs black at apex ... Xystrocera nitidicollis Quedenfeldt, 1883
Distribution: Zaire, Congo, Angola
Photo Carlo Vitali
- 8 Xystrocera boulardi Breuning & Téocchi, 1972
Distribution: Central Africa
- Xystrocera matilei Breuning & Téocchi, 1972
Distribution: Central Africa
- Xystrocera viridilucens Breuning, 1957
Distribution: Liberia, Ivory Coast, Ghana, Togo
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| Francesco |
Posted - 21/04/2013 : 21:18:30
Group 4e
- 1 Elytra punctured ... Xystrocera asperata Thomson, 1858
Distribution: Cameroon, Central African Republic, Zaire, Equatorial Guinea, Gabon, Congo, Angola
Photo Gérard Chemin
- 2 Elytra granulose ... Xystrocera laeta Péringuey, 1892
Distribution: Congo, Malawi, Namibia, Zambia, Zimbabwe
Photo Carlo Vitali
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| Francesco |
Posted - 21/04/2013 : 21:16:47
Group 4d
- 1 Femurs red ... Xystrocera curvipes Breuning, 1957
Distribution: Guinea, Ghana, Togo
- - Femurs black ... 2.
- 2 Antennomeres II-V bicolor ... Xystrocera teocchii Adlbauer, 2011
Distribution: Central African Republic
- - Antennomeres II-V black or brown ... 3.
- 3 Tibiae bowed; pronotum blue ... Xystrocera cyanella Chevrolat, 1855
Distribution: Ivory Coast, Nigeria, Cameroon, Gabon, Congo
- - Tibiae straight; pronotum copper-red ... Xystrocera minuscula Breuning, 1957
Distribution: Gabon, Zaire
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| Francesco |
Posted - 21/04/2013 : 19:12:40
Group 4c
- 1. Antennomeres VI-VII strongly inflated ... Xystrocera antennata Adlbauer, 2011
Distribution: Central Africa
- -. Antennomeres VI-VII normal ... 2.
- 2. Antennomeres III-V inflated ... Xystrocera vicina Ferreira, 1954
Distribution: South Africa
- -. Antennomeres II-V normal ... Xystrocera chalybeata Gahan, 1890
Distribution: Tanzania, Malawi, Zambia, Zimbabwe, South Africa
Photo Riana
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| Francesco |
Posted - 21/04/2013 : 18:59:28
Group 4b
- 1 Metatibiae strongly widened; body colour green to violet; legs red or black ... Xystrocera frontalis Thomson, 1858
Distribution: Dahomey, Nigeria, Cameroon, Zaire, Gabon, Congo, Angola
Photo Carlo Vitali
- - Metatibiae normal ... 2
- 2 Lateral margins of elytra strongly pubescent ...Xystrocera pauliani Lepesme & Breuning, 1951
Distribution: Guinea, Ivory Coast
- - Lateral margin of elytra hairless ... 3
- Xystrocera gracilipes Breuning, 1957
Distribution: Zaire
- Xystrocera granulithorax Breuning, 1964
Distribution: Zaire
- Xystrocera holatripes Breuning, 1957
Distribution: Zaire
- Xystrocera minuta Jordan, 1894
Distribution: Zaire, Gabon, Congo
- Xystrocera pseudosimilis Breuning, 1957
Distribution: Uganda, Tanzania
- Xystrocera similis Jordan, 1894
Distribution: Cameroon, Zaire, Gabon, Congo, Kenya, Tanzania
Photo Riana
- Xystrocera violascens Franz, 1942
Distribution: Ferdinando Poo, Cameroon, Gabon[/*]
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| Francesco |
Posted - 21/04/2013 : 18:34:44
Group 4a
- Xystrocera velutina Jordan, 1894
Distribution: Ivory Coast, Ghana, Cameroon, Zaire, Equatorial Guinea, Gabon, Congo
 
Photo Pierre Haller (above) and Francesco Vitali (under)
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| Francesco |
Posted - 21/04/2013 : 18:27:21
Group 4
Key to the subgroups:
1. Elytra with a pubescent suture ...... 2
-. Elytra without a pubescent suture ... 3
2. Male pronotum with a V-shaped area (1 West-African species)... Group 4a
-. Male pronotum with a triangular area... Group 4b
3. Eyes small, male pronotum with a triangular area (species of Southeastern Africa) ... Group 4c
-. Eyes big .... 4
4. Male pronotum shining, without a sexual punctures (species of the Gulf of Guinea) ... Group 4d
-. Male pronotum with a sexual puncture ... 5
5. Male pronotum with a U-shaped area, pygidium nearly straight at apex ... Group 4e
-. Male pronotum with a V-shaped area, pygidium notched at apex ... Group 4f
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| Francesco |
Posted - 21/04/2013 : 18:03:14
Group 3
- 1 Elytra with 4 large spots ... Xystrocera interrupta Jordan, 1903
Distribution: Cameroon, São Tomé and Príncipe, Central Africa, Equatorial Guinea, Gabon, Zaire, Kenya, Uganda
photo Carlo Vitali
- - Elytra with a simple longitudinal band ... 2
- 2 Elytral band short ... Xystrocera abrupta Aurivillius, 1908
Distribution: Cameroon, Central Africa, Zaire, Chad, Congo, Angola, Uganda, Tanzania
Photo Carlo Vitali
- - Elytral band reaching the apex ... 3
- 3 Pronotum with a large red spot divided by a longitudinal green line ... Xystrocera globosa (Olivier, 1795)
Distribution: Pakistan, Ceylon, India, Nepal, Myanmar, Thailand, Laos, Vietnam, China, Taiwan, Korea, Malaysia, Indonesia (Sumatra Java Timor Celebes), Philippines, New Guinea, Australia. Introduced in Israel, Arabia, Egypt, Mauritius, Comoros, Madagascar, Tahiti, Marquesas, New Caledonia, Hawaii...
Photo Gyula Vida
- - Pronotum with a V-shaped discal area ... 4
- 4 Pronotum subcylindrical; elytra with a narrow band ... Xystrocera dispar Fahraeus, 1872
Distribution: south-eastern Africa from Saudi Arabia to South Africa.
Photo Carlo Vitali
- - Pronotum globose; elytra with a wide band ... Xystrocera vittata (Fabricius, 1792)
Distribution: Senegal, Guinea, Sierra Leone, Mali, Liberia, Ivory Coast, Ghana, Togo, Niger, Cameroon
Photo Pierre Haller
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| Francesco |
Posted - 21/04/2013 : 17:45:07
Group 2
- Xystrocera ansorgei Gahan, 1898
Distribution: Uganda, Kenya
Photo Carlo Vitali
- Xystrocera flavovariegata Breuning, 1957
Distribution: Ethiopia
- Xystrocera fuscomaculata Breuning, 1957
Distribution: Congo
- Xystrocera skeletoides Breuning, 1957
Distribution: Malawi, Kenya
Photo Carlo Vitali
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| Francesco |
Posted - 21/04/2013 : 17:34:51
Group 1
African species
- 1 Body uniformly shining black ... Xystrocera nigrita Audinet-Serville, 1834
Distribution: Senegal, Guinea, Sierra Leone, Mali, Liberia, Ivory Coast, Ghana, Togo, Benin, Nigeria, Niger, Chad, Cameroon, Central Africa, Gabon, Congo, Zaire, Angola, Uganda, Kenya, Zambia. Introduced in São Tomé and Cabo Verde
Photo Gyula Vida
- - Body brown with little or no green reflections ... 2
- 2 Elytra with a very wide green lateral band ... Xystrocera dundensis Lepesme, 1948
Distribution: Zaire, Angola
- -Elytra with a narrow lateral band ... 4.
- 3 Apex of femurs reddish yellow ... Xystrocera rufobrunnea Breuning, 1957
Distribution: Togo
- -Femurs unicolor ... 4.
- Xystrocera marginipennis Murray, 1870
Distribution: Ivory Coast, Ghana, Togo, Nigeria, Cameroon, Central African Republic 
Photo Gérard Chemin
- Xystrocera granulipennis Breuning, 1957
Distribution: Zaire, Uganda, Ethiopia, Kenya
Elytra granulate with evident green reflections
Photo Larry Bezark
- Xystrocera sudanica Breuning, 1957
Distribution: Sudan, Ethiopia
similar to nigrita, but dark brown, with raised elytral ridge
- Xystrocera unicolor Martins, 1980
Distribution: Ethiopia
without horse-shoe sculpture
- Xystrocera elongata Breuning, 1957
Distribution: Ethiopia, Kenya
elongated, uniformly light brown
- Xystrocera ugandensis Martins, 1980
Distribution: Uganda
pronotum strongly transverse
- Xystrocera devittata Kolbe, 1893
Distribution: Tanzania
- Xystrocera ferreirae Martins, 1980
Distribution: Mozambique
- Xystrocera ruficornis Ferreira, 1954
Distribution: Rhodesia
- Xystrocera erosa Pascoe, 1864
Distribution: Mozambique, Zimbabwe, Botswana, South Africa, Lesotho 
Photo Denis Potanin
- Xystrocera natalensis Ferreira, 1954
Distribution: South Africa
Oriental species
- 1. Elytral apex spined ... Xystrocera apiculata Pascoe, 1869
Distribution: Indonesia, New Guinea
Photo Gérard Chemin
- - Elytral apex mutic ... 2
- 2 Elytra with a very wide green lateral band ... Xystrocera festiva Thomson, 1861
Distribution: Myanmar, Thailand, Malaysia, Laos, Vietnam, Borneo, Indonesia (Sumatra, Java)
Photo Cristian Pella
- -Elytra unicolor ... 3
- 3 Shining black, similar to X. erosa ... Xystrocera australasiae Hope, 1842 (living specimen here)
Distribution: Australia
- -Elytra brown, with more or less green reflections ... Xystrocera virescens Newman, 1840 (living specimen here)
Distribution: Australia
- -Elytra dull brown ... Xystrocera brunnea Aurivillius, 1924
Distribution: Malaysia, Borneo, Sumatra
Photo Andre Skale
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| Francesco |
Posted - 21/04/2013 : 17:32:20
Key to the groups
- Elytra with uniform dull color, lateral margins more or less obscured... Group 1
- Elytra with scattered dark spots... Group 2
- Elytra with a longitudinal band on the disc... Group 3
- Elytra with uniform metallic colour... Group 4
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| Francesco |
Posted - 21/04/2013 : 17:25:02
Generality
Xystrocera Audinet-Serville, 1834 is a genus belonging to the tribe Xystrocerini Blanchard, 1845.
The main character of this genus is a more or less angulated apex of the scape, which can sometimes form a distinct spine.
This character is also present in several Callichromatini and in few other Xystrocerini.
With respect to Callichromatini, Xystrocerini differ in the corneous ligula (peculiar character of the tribe! ) and in the coarsely faceted (= nocturnal  ) eyes.
With respect to Xystrocerini, the apical spine is also present in the genus Listrocerum Chevrolat, 1855 (= Psathyrus Thomson, 1857, Combesius Lepesme, 1950), Diptychoeme Aurivillius, 1914 and Catoeme Aurivillius, 1908, which nevertheless have a slimmer body and in the genus Xystroceroides Lepesme, 1948, which nevertheless has spined elytra (here).
Moreover, Xystrocera is carachterised by very short head, vertical forehead, flattened elytra, adsperate antennae, and flattened tibiae.
Except for the scape, it does not differ much from Oeme (here). |
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