Obtusicauda
Soliman, 1927
Obtusicauda is a of aphids in the Aphididae, tribe Macrosiphini, established by Soliman in 1927. in this genus are small, soft-bodied sap-feeding insects. As members of the Macrosiphini, they possess long and cornicles (siphunculi) on the . The genus includes species associated with specific plants, though detailed biological information remains limited.
Pronunciation
How to pronounce Obtusicauda: /ɒb.tuː.sɪˈkaʊ.də/
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Identification
Obtusicauda can be distinguished from other Macrosiphini by the combination of a rounded (obtuse) cauda and specific antennal segment ratios. The cauda shape, referenced in the genus name (Latin: obtusus = blunt, cauda = tail), is a key diagnostic feature. Accurate identification to species level requires examination of morphological details including the shape of the siphunculi, antennal , and chaetotaxy (bristle arrangement).
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Distribution
of Obtusicauda have been recorded in the Palearctic region, with documented occurrences in Europe and parts of Asia. Specific distribution varies by species.
Similar Taxa
- MacrosiphumBoth are in tribe Macrosiphini with long and similar body form; Macrosiphum generally have a more pointed cauda compared to the obtuse cauda of Obtusicauda.
- AcyrthosiphonShares tribe Macrosiphini and general ; Acyrthosiphon typically has a more elongate body and different antennal segment proportions.
More Details
Etymology
The name combines Latin 'obtusus' (blunt, dull) and 'cauda' (tail), referring to the characteristic rounded or blunt shape of the cauda in these aphids.
Taxonomic History
Established by Z. Soliman in 1927, the has undergone periodic revision. Some originally described in Obtusicauda have been transferred to other genera, reflecting ongoing refinement of based on morphological and molecular data.