Morellia (P.) humeralis ( Stein, 1918 )

Pamplona, Denise, Nihei, Silvio S., Couri, Márcia S. & Pont, Adrian C., 2016, Taxonomy of Morellia Robineau-Desvoidy (Diptera: Muscidae): revision of the subgenera Morellia s. str. and Parapyrellia Townsend, Zootaxa 4163 (1), pp. 1-110 : 94-96

2. Morellia (P.) humeralis ( Stein, 1918)

( Figs 174–181 )

Pyrellia humeralis Stein, 1918: 204 . Type localities: BRAZIL, Teresopólis and Espírito Santo; PERU; BOLIVIA. Syntypes: 2 ƋƋ, 1 ♀, ZMHB (seen); 1 Ƌ, 2 ♀♀, NHMW (seen); 2 ƋƋ, 1 ♀, HNHM (destroyed 1956); none in SMT ( Pont 2013: 80).

Redescription. Colour. Black, with blue reflections. Frontal vitta shining black on upper half; lower half of frontal vitta, parafacial, face and inner portion of gena light brown with grey pruinosity; outer portion of gena shining; antenna yellowish with grey pruinosity; pedicel yellow, basal half of arista yellow; palpus yellow; postpronotal lobe yellow; mesonotum with one silver-dusted central vitta along presutural acrostichals and halfway along postsutural acrostichals; legs brown; haltere yellow; calypters brownish, upper calypter on outer half white and opaque; wing yellowish, with dark markings on humeral cross-vein, subcostal apex (connected to a spot on r-m cross-vein), and on the apex of cell r1. Abdomen without pruinosity.

Male. Body length: 5.0–6.0 mm; wing length: 5.0 mm.

Head. Eyes bare, separated at level of anterior ocellus by 0.13–0.18 of head width; frons divergent towards lunule; ocellar triangle with a pair of setae and 2 pairs of setulae; 11 pairs of frontal setae; postpedicel 2.0–2.1 times the length of pedicel; pedicel with 1 seta and a few short setulae; arista plumose, with 14–15 cilia, bare apicad, and with some secondary plumes as far as level of 4th to 5th cilia; vibrissa shorter than arista; 1 supravibrissal seta, less than half the length of vibrissa, and a few setulae that extend to level of apical fourth of postpedicel; 5 subvibrissal setae followed by 8–10 genal setae. Palpus expanded at apex.

Thorax. Acrostichals 0+1; dorsocentrals 0+3; intra-alars 1+1; presutural 1; prealar 2, the second less than half as long as first supra-alar; supra-alars 2; postpronotals 4, the innermost weaker; notopleuron with 2 long, subequal setae and covered with ground-setulae; postalars 2; no intrapostalar; scutellum with 1 basal, 1 latero-discal and 1 apical pairs of strong setae, and latero-ventrally with many setae, the basalmost ones downcurved; postalar wall and suprasquamal ridge bare; proepisternal depression bare; proepimeron with 3 long setae; prosternum broad and bare; anepisternum with a posterior row of about 12 setae, with 2–3 weak setae upcurved on upper-anterior corner, and covered with long setulae; katepisternals 1+2; anepimeron extensively setulose; katepimeron with 1 or 2 setulae; anatergite bare; katatergite setulose. Legs: fore femur with a posterodorsal row of setae, a complete posteroventral row of setae, and a posterior row of setae on apical two-thirds; fore tibia with a dorsal row of very short and strong setulae, 1 dorsal, 1 posterodorsal and 2 posteroventral apical setae, and anterior surface with a ctenidium of golden setulae; fore tarsus with some long setae on basal segment; mid femur without a tubercle, with 2–3 agglutinated short spines at apex that continue as about 3 posterodorsal to posterior setae, and 6–8 ventral setae on basal half; mid tibia with 3 strong posterior setae, 1 on basal third, 1 on middle third and 1 on apical third, with 1 posterodorsal seta on apical third, a row of very short and strong dorsal setulae, and 2 anteroventral, 1 dorsal, 2 posterodorsal, 2 posteroventral and 2 ventral apical setae; hind femur with an anteroventral row of setae, strongest on apical third, an anterodorsal row of setae, a few posteroventral setulae on apical fourth, and 2 posterodorsal preapical setae; hind tibia with many long setae and setulae on anteroventral-posteroventral surfaces, 1 anterodorsal seta on middle third and 1 on apical third, a dorsal row of very short but strong setulae, 1 dorsal, 2 anterior and no anterodorsal preapical setae, 2 anteroventral, 1 ventral and no posteroventral apical setae, and a posterior brush-like ctenidium; hind tarsus with strong setae ventrally. Wing ( Fig. 174 ) with a uniform covering of microtrichia; dm-cu almost straight; stem-vein bare before, and with 4 short setulae after, humeral cross-vein on dorsal surface, and ventrally with about 2 short setulae before, and bare after, humeral cross-vein; R2+3 bare on dorsal and ventral surfaces; R4+5 setulose from base to just after r-m on dorsal and ventral surfaces; 3 strong setae on basicosta.

Abdomen. With a lateral tuft of setulae on syntergite 1+2, tergites 3–5 with normal setulae; sternite 1 setulose; posterior margin of sternite 5 almost straight and with a few setae laterally ( Fig. 175 ).

Terminalia. Apical third of cercal plate bare; cercal plate ventrally with 2 spinose setae; surstylus with many setulae and 1 seta on apical half ( Figs 176–178 ); aedeagus with many spicules on anterior membrane of distiphallus; gonopod with 1 long and strong seta on basal third; paramere with some setae on apical half ( Fig. 179 ).

Female. Body length: 5.5–6.0 mm; wing length: 5.0 mm.

Similar to male, differing as follows: frontal vitta on upper half and fronto-orbital plate black; lower half of frontal vitta reddish; parafacial, face and gena brownish-yellow; eyes separated at level of anterior ocellus by 0.32– 0.33 of head width; fronto-orbital plate with 3 proclinate and 2 reclinate setulae; mid femur without agglutinated setae but with 3–4 posterodorsal-dorsal setae; hind tibia without many long setae and setulae on anteroventralposteroventral surface.

Ovipositor. Tergite 6 shaped as 2 golf-club-like rods; tergite 7 as 2 rods, posteriorly with 2 plates with some small spines; tergite 8 as 2 broad rods, posteriorly with 2 plates with small spines; sternite 7 as 1 rod, posteriorly with 3 plates with many small spines; sternite 8 as 2 very small plates with very small setulae; epiproct with many small spines; hypoproct with many long setae; cercus cylindrical and long ( Figs 180–181 ).

Material examined. BRAZIL: no further data, 2 Ƌ and 1 ♀ syntypes ( NHMW) ; Espírito Santo, Linhares , v.1972, R.C. Elias, 1 Ƌ, 2 ♀♀ ( MNRJ) ; Rio de Janeiro, Petrópolis, Alto da Mosela , ii.1956 and 1.ii–8.iii.1957, D. Albuquerque, 2 ƋƋ ( MNRJ) ; PERU: Pachiteamündung [mouth of the River Pachitea], 18 & 23.xi.1903, W. Schnuse, 2 Ƌ syntypes ( ZMHB) ; PERU, locality illegible, 22.x.1903, W Schnuse, 1 ♀ syntype ( ZMHB) .

Distribution. NEOTROPICAL: Peru, Bolivia, Brazil, Paraguay.

Figures

FIGURES 174 – 181. Morellia (P.) humeralis (Stein). 174. Wing. 175. Sternite 5, male. 176. Cercal plate, male. 177. Detail of ventral spined process of cercal plate, male. 178. Left surstylus, male. 179. Phallic complex, lateral view. 180. Ovipositor and spermathecae, dorsal view. 181. Ovipositor, ventral view.