Phyladelphus Becker, 1910

Deeming, John C., 2018, A revision of the Afrotropical species of Pachylophus Loew (Diptera: Chloropidae) and some related Ovoviviparous genera, Zootaxa 4482 (1), pp. 1-51: 24

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Phyladelphus Becker, 1910


Phyladelphus Becker, 1910 

Type species Phyladelphus thalhammeri Becker, 1910: 54  by monotypy.

Left unattributed to a genus group by Andersson (1977: 180), this genus is known from two oriental, one European and one East African species. Notes on it are given by Deeming (1981: 811–812), who was only able to liken it to Mepachymerus Speiser, 1910  which latter Andersson (1977: 132) placed along with Steleocerellus Frey, 1961  in a discrete genus group. P. geminus Becker, 1910  and the new species here described as P. woodi  have in common with this genus group a flattened laceolate arista that is often rather rounded apically and which is clothed in very short setae. However, such aristal development does occur elsewhere. Duda (1933: 142) described a Steleocerus lindbergi  from Morocco with just such aristal development ( Steleocerus Becker, 1910  is now placed as a junior synonym of Mepachymerus Speiser  of the same year). This species was recorded from Bulgaria and transferred into Lasiosina Becker  by Beschovski (1983: 78–80). My dissection of the abdomen of a female from Turkey (Ödemis, Lake Gölcük, 9.vii.1997, J.C. Deeming, in NMWC) confirms this. It has narrow cerci and the ovipositor, when extended, is nearly as long as the abdomen. Thus, in the Chloropidae  , the character of a blade-like arista, which is undoubtedly apomorphic and cannot be regarded as being of diagnostic significance in the attributing of species to genera, although in the Lauxaniidae  and Celyphidae  it may well be so.


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