Octavius sarkae xhosa, Janák, 2014

Janák, JiĜí, 2014, New species and subspecies of Octavius from South Africa, with a key and additional distribution records (Coleoptera: Staphylinidae: Euaesthetinae), Acta Entomologica Musei Nationalis Pragae 54 (1), pp. 195-231: 217-219

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Octavius sarkae xhosa

subsp. nov.

Octavius sarkae xhosa   subsp. nov.

( Figs 49, 52 View Figs , 56 View Figs , 60 View Fig )

Type locality. South Africa, Eastern Cape Province, Mkhambati NR, 31°16ƍS, 29°59.8ƍE.

Type material. HOLOTYPE: 3: ‘ South Africa, Eastern Cape, Mkhambati NR, indig.forest at Mkhambati river , 28.i.2012, 31°16S; 29°59.8E, J. Janák lgt. // forest litter, sifting // Octavius sarkae xhosa   ssp. n., J. Janák det. 2013’ ( TMSA) GoogleMaps   . PARATYPES: 4337 ♀♀: same data as holotype ( JJRC).

Description. In most external characters very similar to O. sarkae   sp. nov., but slightly smaller, body length 1.5–1.8 mm (M 1.6 mm, HT 1.7 mm), forebody length 0.7–0.8 mm (M 0.8 mm, HT 0.8 mm); eyes on average slightly larger (length temples – eyes R 1.26–1.48, M 1.39, HT 1.47).

Other measurements: width head – pronotum R 0.88–0.91, M 0.89, HT 0.88; pronotum width – length R 1.10–1.17, M 1.14, HT 1.13; elytra width – length R 1.38–1.54, M 1.48, HT 1.47.

Male. Sternite 8 and 9 as in O. sarkae   sp. nov. Aedeagus similar as in O. sarkae   sp. nov. (n = 5, length 0.43–0.45 mm, M 0.44 mm, HT 0.44 mm), but apical portion of internal sclerotised plate hook-shaped and median lobe with low sharp ventral ridge apically ( Fig. 49, 52 View Figs ).

Differential diagnosis. Octavius sarkae xhosa   subsp. nov. differs from the nominotypical subspecies of O. sarkae   sp. nov. and O. sarkae ntsubane   subsp. nov. only by the aedeagus, which is characterised by the apical portion of internal sclerotised plate hook-shaped, not rounded or ¿shtail-shaped, and by the median lobe with low ventral ridge apically. Octavius sarkae xhosa   subsp. nov. can be distingushed externally (sometimes with dif¿culties) from O. sarkae ntsubane   subsp. n. by distinct granulation between anterior margin and transverse impression (in the latter subspecies this region is coarsely reticulate and wrinkled).

Bionomics. All specimens have been found in siftings of forest litter in indigenous forest.

Distribution. Octavius sarkae xhosa   sp. nov. has been currently recorded only from Mkhambati NR in Eastern Cape Province, South Africa ( Figs 56 View Figs , 60 View Fig ).

Etymology. This species is named after the tribe Xhosa   , who inhabit the area where the type locality is situated.


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