Prochyliza ignifera, Martín-Vega, Daniel, Ebejer, Martin J. & Whitmore, Daniel, 2017

Martín-Vega, Daniel, Ebejer, Martin J. & Whitmore, Daniel, 2017, Out of the South? The first Afrotropical record of Prochyliza Walker (Diptera: Piophilidae), with description of a new species, Zootaxa 4232 (1), pp. 144-150: 145-148

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Prochyliza ignifera

sp. nov.

Prochyliza ignifera   sp. nov.

( Figs 1–5, 7–11 View FIGURES 1 – 8 View FIGURES 9 – 11 )

Type material. Holotype: ♂; label data ( Fig. 3 View FIGURES 1 – 8 ) as follows: ALDABRA: / South Island, / Dune Jean-Louis / 13– 20.iii.1968 / B. Cogan & A. Huston // Aldabra Atoll, / Royal Society / Expedition   , 1967–68 / B.M. 1968–333 // HOLOTYPE ♂ / Prochyliza   / ignifera   sp. n. / Martín-Vega, Ebejer & / Whitmore 2016 // NHMUK010241031. Deposited at NHMUK. Paratypes: 10 ♂♂, labelled: General sweeping; / pristine & secondary / vegetation // LA RÉUNION / Ravine des Orangers / 21°06ʹ01ʹʹS, 55°45ʹ40ʹʹE / 31.x.2015, 26 m / M.J. Ebejer // PARATYPE ♂ / Prochyliza   / ignifera   sp. n. / Martín-Vega, Ebejer & / Whitmore 2016   ; 2 specimens deposited at NHMUK (NHMUK010241418 and NHMUK010241419), 2 specimens in MNHN, 2 specimens in CIRAD (Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Saint-Denis, La Réunion, France)   , 2 specimens in NMB ( National Museum , Bloemfontein, South Africa) and 2 specimens in the personal collection of MJE.  

Diagnosis. Prochyliza ignifera   differs from other species in the genus by the bright orange head (including vertex and postgena), the long ocellar setae (approximately as long as vibrissa), the entirely yellow fore femur and the conspicuously enlarged abdominal spiracles.

Description. Male. Length 3.8 mm. Body shiny bluish-black, with well-developed macro-setae ( Figs 1–2 View FIGURES 1 – 8 ). Head higher than long; frons, vertex, gena and postgena bright orange; occiput dark brown; pedicel bright orange; first flagellomere mostly dark brown (partially broken in both antennae in the holotype); arista bare; eye bare, nearly round in lateral view; frons weakly setulose, with four minute fronto-orbital setae, only upper one more clearly discernible; ocellar setae well-developed, approximately as long as vibrissa ( Figs 4–5 View FIGURES 1 – 8 ), arising slightly behind the anterior ocellus; medial and lateral vertical setae and postvertical seta well-developed, but shorter than ocellar setae; lunule bare; gena recessed and at deepest part 0.8 times as high as eye; vibrissa strong and approximately as long as ocellar setae; mouthparts yellow.

Thorax shiny bluish-black, brownish at the extreme margins of the sclerites; only episternum and propleuron (including anterior spiracle) yellow, propleuron strongly pruinose; scutum sparsely but more or less uniformly setulose; chaetotaxy: proepimeral, postpronotal and presutural intra-alar setae absent, 2 notopleural, 1 supra-alar, 1 post-alar, 1 postsutural intra-alar and 1 dorsocentral setae, all well-developed ( Fig. 2 View FIGURES 1 – 8 ); 1–2 propleural setae; scutellum with transverse rugae, bare and flat, with 2 pairs of marginal setae, apical pair almost twice the length of basal pair and 1.3 times longer than scutellum; katepisternum with a weak seta at posterodorsal corner and about 6 strong setae at ventral corner ( Fig. 1 View FIGURES 1 – 8 ); anepisternum sparsely setulose; anepimeron bare; meropleuron entirely pruinose. Wing completely hyaline and veins entirely pale yellow; calypter and haltere yellowish-white. Legs uniformly covered with short black setulae; fore femur, along apical half, with 2–3 dorsal and 3–4 postero-ventral weak setae; coxae, trochanters and femora entirely yellow; fore tibia dark brown, fading to pale brownish-yellow in basal third; hind tibia with an incomplete dark brown annulus on apical quarter; first tarsomere not modified, yellow to dark brown, about as long as combined length of tarsomeres 2 and 3; tarsomeres 2 and 3 yellow, tarsomere 4 partially dark brown and tarsomere 5 entirely dark brown. Mid and hind tarsi completely yellow, except tarsomere 5 yellow to partially dark brown on hind leg.

Abdomen shiny brown with a fine microsculpture of transverse rugae on dorsal surface of tergites; tergites with scattered erect setulae, longer medially at posterior margin and laterally as long as respective tergites; abdominal spiracles conspicuously enlarged ( Figs 7–8 View FIGURES 1 – 8 ); sternites 2 to 5 quadrangular and with strong and conspicuous setae, especially at posterior margin; sternite 5 ( Fig. 9 View FIGURES 9 – 11 ) slightly wider than sternite 4 and with a broad groove along midline. Sternite 7 ( Fig. 9 View FIGURES 9 – 11 ) with a distinct, strongly bent peg-like process. Postabdomen ( Figs 10–11 View FIGURES 9 – 11 ) as in other Prochyliza   and Piophila   ; surstylus greatly reduced, visible only as a small convexity at postero-ventral corner of epandrium; hypandrium relatively large and of complex structure with a median anterior process and dome-shaped central part from where bilateral posterior arms, broadening at their apex, arise; pre- and postgonites heavily sclerotized; ejaculatory apodeme free, lying just anterior to epandrial cavity with clearly visible, although membranous, duct to basiphallus; distiphallus long and convoluted, poorly sclerotized.

Female. Unknown.

Immature stages. Unknown.

Etymology. The specific epithet ignĭfěra   (“fire-bearing”) is a Latin adjective in the nominative case, feminine, singular. It refers to the distinctive bright orange head of the species and to the volcanic seamount that gave rise to the Aldabra Atoll, the type locality of the species, and the volcanic island of La Réunion.

Biology. Prochyliza ignifera   was collected on a chicken carcass in La Réunion, together with adult flies of the sarcosaprophagous species Musca domestica Linnaeus   ( Diptera   : Muscidae   ), Chrysomya albiceps (Wiedemann)   and Chrysomya megacephala (Fabricius)   ( Diptera   : Calliphoridae   ). This suggests that the larvae of P. ignifera   could be of sarcosaprophagous habits, like other Prochyliza   species and most Piophilidae   ( McAlpine 1977; Martín-Vega 2014).

Differential diagnosis. Prochyliza ignifera   runs to Prochyliza   using the key to Piophilidae   genera of McAlpine (1977) and Ozerov & Norrbom (2010). The scutum is uniformly setulose throughout as in all other known Prochyliza   species ( McAlpine 1977; Martín-Vega 2014), although the setulae are stronger and rather sparsely distributed. This stronger setulosity throughout the body, the almost entirely bright orange head (only darkened in the occipital region) and the conspicuously enlarged abdominal spiracles give P. ignifera   a distinct appearance ( Figs 1–2, 4, 7–8 View FIGURES 1 – 8 ). An updated key to the species of Prochyliza   is provided below; illustrations for the characters of the remaining Prochyliza   species can be found in Martín-Vega (2014).


Centre de Cooperation Internationale en Recherche Agronomique pour le Developpement


Naturhistorishes Museum