Dactylodeictes brevifacies James, 1974

Braga, Lara Duarte Piau, Lopes, Welinton Ribamar & Pujol-Luz, José Roberto, 2020, Description of the puparium and adult genitalia of Dactylodeictes brevifacies James, 1974 (Diptera: Stratiomyidae), Papéis Avulsos de Zoologia 60, pp. 1-7 : 3-6

Dactylodeictes brevifacies James, 1974

Records of geographical distribution: Neotropical: Panama, Peru (Madre de Dios, Avispas), Brasil: (Goiás e Tocantins) new record.

Material examined: Fifty-eight puparia (34 ♂♂ and 24 ♀♀): Brasil, Goiás, Alvorada , 09.iii.2004, J. Brandão col. ( DZUB), emerged 29.ix.2004 (2 ♀♀), 11.x.2004 (2 ♀♀) ; Goiânia, Campus Samambaia-UFG, 12.xii.2016, W.R. Lopes col. ( CZUFG), emerged 25.viii.2017 (1 ♂), 07.ix.2017 (1 ♀), 26.ix.2017 (1 ♂) ; Varjão , 18.xii.2016, W.R. Lopes col.( CZUFG),emerged 09.viii.2017 (1 ♂), 05.ix.2017 (1 ♀), 07.ix.2017 (1 ♂), 09.ix.2017 (1 ♀), 11.ix.2017 (1 ♀), 19.ix.2017 (1 ♀), 01.x.2017 (1 ♂), 09.x.2017 (1 ♀), 24.x.2017 (1 ♀), emerged 20.xii.2017 (1 ♀) ; Varjão , 21.i.2017, W.R. Lopes col. ( CZUFG), emerged 09.viii.2017 (1 ♀), emerged 10.viii.2017 (1 ♂), 17.viii.2017 (1 ♂), 22.viii.2017 (1 ♂), 28.viii.2017 (2 ♀♀), 28.viii.2017 (1 ♂), 30.viii.2017 (2 ♀♀), 31.viii.2017 (1 ♂), 04.ix.2017 (1 ♀), 29.x.2017 (1 ♂), 01.xi.2017 (1 ♂, 2 ♀), 02.xi.2017 (1 ♂), 17.xi.2017 (1 ♂), 08.xii.2017 (1 ♂), 27.xii.2017 (1 ♀) ; Varjão , 28.ii.2017, W.R. Lopes col. ( CZUFG), emerged 26.viii.2017 (1 ♂), 15.x.2017 (1 ♀), 16.x.2017 (1 ♀), 26.x.2017 (1 ♀), 30.x.2017 (2 ♀♀), 01.xi.2017 (2 ♀♀), 01.xi.2017 (1 ♂), 02.xi.2017 (1 ♂), 22.xi.2017 (1 ♀) ; Goiânia, Campus Samambaia-UFG, W.R. Lopes col. ( CZUFG), 29.iii.2017, emerged 13.ix.2017 (1 ♀) ; 30.iii.2017, emerged 11.ix.2017 (1 ♀), 30.x.2017 (1 ♂), 11.ix.2017 (1 ♀), 31.viii.2017 (1 ♂); Tocantins, Peixe , 25.iv.2018, W.R. Lopes col. ( CZUFG), emerged 07.xi.2018 (1 ♂), 29.xi.2018 (1 ♀), 28.i.2019 (1 ♂) .

Puparium: Length 7.2-7.8 mm, body flattened dorsoventrally with head, three thoracic segments, and eight abdominal. Cuticle with usual mosaic appearance. Chromatic pattern dark yellowish-brown. Plumose setae.

Head: Triangular and not dorsoventrally flattened; length slightly larger than the width ( Figs. 4-5 ). In the anterior part of the head, presence of a small antenna with four sensilla, the third much longer than others ( Fig. 6 ; maxillary palpus (mp) with three sensory papillae round- ed at apex ( Fig. 7 ). Chaetotaxy: one pair of lateral setae (L) inserted posteriorly to the antenna (a) and ventrally to the eyes (e); two pairs of clypeofrontal setae (Cf) (antenna inserted between the 1 st and 2 nd pair), dorsolateral setae (Dl) at the height of the final portion of the eye (e) ( Fig. 4 ); three pairs of ventrolateral setae (Vl) and three pairs of ventral setae ( V) ( Fig. 5 ).

Thorax: First segment narrower (horizontally) than the other segments and taller (vertically) than the next segment; anterior spiracle (as) prominent with a pair of dorsolateral setae (Dl) and a pair of ventrolateral setae (Vl) above; first segment in dorsal view with two rows of bristles: two pairs of anterodorsal setae (Ad) and three pairs of dorsal setae (D). In ventral view, two pairs of ventral setae ( V), the outermost pair being bifurcated ( Figs. 4-5 ); 2 nd and 3 rd segments with a row with three pairs of dorsal setae (D); two pairs of ventral setae ( V), the outermost pair being bifurcated in the 2 nd and 3 rd segments; a pair of lateral setae (L) and a pair of ventrolateral setae (Vl).

Abdomen: Segments 1-7 with basically the same shape; presence of a row with three pairs of dorsal setae (D) ( Figs. 8-9 ), growing as they move away from the center of the body; three pairs of ventral setae ( V) ( Figs. 10-11 ), the outer pair being slightly longer than the others; four pairs of lateral abdominal setae (L) – one dorsolateral pair (Dl), one lateral pair (L), two ventral pairs ( V) ( Fig. 8 ); ventromedial line of the sixth segment with a characteristic uniform elliptic sternal patch (sp) ( Figs. 10 and 12 ), the base of the inner ventral setae ( V) more distant than in other segments; segment 8 apically rounded, with a pair of dorsal setae; four pairs of ventral setae ( V) ( Figs. 11 and 13 ); two pairs of lateral setae (L), the second pair inserted more dorsally and not facing downwards, a pair of subapical setae (Sap) and a pair of apical setae (Ap).

Male adult terminalia: Epandrium semi-rectangular; proctiger (hypoproct) subtriangular; cerci (cerc) margined with long bristles and bifid spine-like epandrial ( Fig. 14 ); hypandrium (hypd) sub rectangular in dorsal view; gonocoxite (goncx) quadrangular, with gonocoxal apodeme (goncx apod) parallel and rounded ends; posterior margin of the hypandrium is short and arched; gonostyle (gonst) simple, rounded, concave medially (spoon shaped) and arched toward the midline ( Fig. 15 ); aedeagus trifid large with the distal half; lobes of the aedeagus free, projected beyond the distal end of gonocoxite ( Fig. 16 ).

Female adult terminalia: Tergite 9 rounded, wider distally than basally. Genital fork with posterior arm subigual than anterior arm ( Fig. 17 a-17b); anterior arm arched with an extremely long and thin process; posterior bridge (pb) with a medial orifice, posterolateral process (pp) broader posteriorly. Cercus with only one segment.

Figures

Figures 4-7.Dactylodeictes brevifacies.Puparia.(4) Head and first thoracic segment (dorsal view);(5) Head and first thoracicsegment (ventral view);(6) Antennae; (7) Maxillary palpus.Scale bar = 500 μm (Figs.4-5). Scale bar = 5 μm (Fig.6). Scale bar = 2 μm (Fig.7).

Figures8-13.Dactylodeictesbrevifacies.Puparia.(8) Structureofthe bristlesof thelateral regionof theabdominal segments;(9)Abdominalsegments (dorsalview); (10) Sixthabdominal segment;(11) Abdominal segments (ventral view);(12) Sternal patch on abdominal segment6, in ventral view;(13) Abdominal segment8 in ventral view.Scale bar = 500 μm (Figs.8-9). Scale bar = 200μm (Fig.10). Scale bar = 500μm (Fig.11). Scale bar = 50μm (Fig.12). Scale bar = 200 μm (Fig.13).

Figures14-17.Dactylodeictesbrevifacies.Male:(14)epandrium (tergite 9),tergite10and cerci,indorsalview;(15)hypandrium,gonocoxitesandgonostyles,dorsal view;(16) aedeagus trifid; Female:(17) genital fork.(A) genitalfork optical microscopy;(B) schematic representation draw of genital fork.