Aztecatopse spinosa, Huerta, Herón & Haenni, Jean-Paul, 2016

Huerta, Herón & Haenni, Jean-Paul, 2016, New species of the genus Aztecatopse Haenni & Huerta from Mexico (Diptera, Scatopsidae), Zootaxa 4178 (1), pp. 79-96: 89-95

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Aztecatopse spinosa

sp. nov.

Aztecatopse spinosa  sp. nov.

( Figs 1View FIGURE 1 C, 3D, 4D, 6D, 7D, 9D, 10D, 11D, 15, 16)

Type material. HOLOTYPE: Male (slide mounting). Mexico, Estado de México, Otumba, Locality Coyotepec, 2530 m, 19º 39’ 09.3’’ N  ; 98º 45’ 25.7’’ W, 12.IV –4.V.2007, Malaise Trap, D. Hernández Zetina leg. ( CAIM). Paratypes: 48 males, same data except 12.IV –4GoogleMaps  . V.2007, 10 males (in alcohol), 5 males (slide mounting); same data except 24.V –14GoogleMaps  . VI.2007, 17 males (in alcohol), 1 male (slide mounting); same data except 5–26GoogleMaps  . VI.2007, 2 males Abbreviations: aedeagus (aed), epandrium (epand), lateral processes of gonocoxite (lat proc gx), paramere (pm), sternite (S).

(in alcohol), 2 males (slide mounting); same data except 24-VIII-14  - IX.2007, 2 males (in alcohol), 1 male (slide mounting); same data except 4–31  - X.2007, 6 males (in alcohol); same data except 15.XI –6  . XII.2007, 1 male (in alcohol); same data except 23.I –13  . II.2008, 1 male (in alcohol). All paratypes in CAIM, except 5 in MHNN.

Diagnosis. Tergite 7 subrectangular, bearing a pair of posterolateral, elongated projections; sternite 7 broad, extended laterally, with a pair of short posterolateral lobes; aedeagus elongate, bearing a subapical group of long erect setae.

Description. Male. Similar to A. amorimi  sp. nov. in most characters. Body length approximately 2.0 mm ( Fig. 1View FIGURE 1 C). Head. ( Fig. 1View FIGURE 1 C). Ommatidia equal in size, in lateral view at level of base of scape, a row of 6 ommatidia disposed from outer to inner ocular margin; antennae ( Fig. 3View FIGURE 3 D), scape square; pedicel subcylindrical, 8 flagellomeres covered with microtrichia and sensilla; flagellomeres I –VII twice as wide as long, each bearing a whorl of setae, last flagellomere rounded, as long as 2 preceding ones; flagellum length, 0.28 mm; palpi ( Fig. 4View FIGURE 4 D) subcylindrical, apically rounded, with at least 3–4 subapical sensory pits, length 0.10 mm, width 0.04 mm.

Thorax. ( Fig. 1View FIGURE 1 C). A well-marked row of 9 supraalar setae; anterior spiracular sclerite setose (7–9 setae), with a well-marked antero-dorsal pointed projection, spiracle large, not longer than high ( Fig. 6View FIGURE 6 D); pleural setae: 6–7 anepisternal, in upper anterior corner of sclerite, 8 anepimeral, 6 subalar, 2–3 katepisternal, 4 posterior spiracular, no meral setae.

Wing. ( Fig. 7View FIGURE 7 D) length, 1.07–1.12 mm, width, 0.50–0.53 mm. R4+5 reaching costa beyond middle of wing, and slightly beyond level of fork of M; M fork nearly twice as long as stem, gradually widening towards wing margin; second costal section shorter than first; a false vein present between M2 and CuA1; CuA2 smoothly angled near middle, reaching wing margin obliquely. Wing length/section costal 1:2.7; WL/C2: 6.4; WL/C3: 2.09; WL/C1+C2: 1.91; C extending 0.52 of wing length.

Abdomen. Tergite 7 wider than long, subrectangular, bearing a pair of posterolateral, elongated, pilose processes ( Figs 9View FIGURE 9 D, 10D); posterior margin slightly produced medially; length, 0.14 mm, width, 0.19 mm. Sternite 7 wider than long, rounded anteriorly, expanded laterally, bearing a pair of short rounded, setose posterolateral lobes, posteriorly emarginate, ( Figs 9View FIGURE 9 D, 10D) with ornamented median zone close to the posterior margin bearing a group of small, nearly spinose granulations; length, 0.13 mm, width, 0.31 mm. Genital capsule ( Figs 11View FIGURE 11 D, 15), epandrium with anterior margin deeply V-shaped; posterior margin produced into a short sclerotized plough-like projection; gonocoxites joined to epandrium, with a pair of short and slightly curved, setaceous processes; aedeagus elongated and thick, bearing a subapical group of long erect setae. Parameres elongate, flattened, with sharp pointed tip and subapical, ventrally directed lobes.

Female. Unknown.

Distribution. Nearctic. Mexico (Estado de Mexico) ( Fig. 16View FIGURE 16).

Bionomics. The specimens of the type series were collected with a Malaise trap in an arid zone of Central Mexico dominated by Agavaceae  and Cactaceae  . The flight period extends over most of the year, with higher number of specimens collected in May –June.

Etymology. This specific epithet is a Latin adjective spinosa  meaning “full of spines, thorny”, in reference to the subapical group of long setae of aedeagus.


Collection of Aquatic Important Microorganisms