Micropygomyia (Coquilletimyia) nahua Ibáñez-Bernal, García-Torres & Vásquez-Márquez, sp. nov.
(Figures 1–22)
Material examined. Holotype male (microscope slide), with labels as follows: Mexico, Veracruz, Municipio Naolinco, Tenampa-Chivería, 22-iv-2016, J. Solís, col./ Micropygomyia nahua male, Holotype .
Paratypes (microscope slides): 8 males, 5 females, same collection data as holotype, all with additional taxonomic label: Micropygomyia nahua (sex), Paratype.
Type-locality. Mexico, Veracruz, Municipio Naolinco, Tenampa-Chivería (about 10 km south of Naolinco city by road; 19°36’42.10” N 96°51’39.96” W, 900 m asl).
Male description. Holotype. Body pale brown, uniformly sclerotized. Head (Fig. 1) in frontal view pyriform, ratio of head length (from vertex to distal margin of clypeus) to width: 1.3; vertex somewhat enlarged; setae alveoli patches of frons extending anteriorly at midline, meeting supra-ocular alveoli patches. Eyes small, 0.87 the length of clypeus, and about as long as the frons measured from vertex to the intra-ocular sutures; intra-ocular sutures no more than 0.2 the frons width; intra-ocular space as wide as an eye. Ratio of labrum length to head length: 0.47; ratio of labrum length to flagellomere I length: 0.67; ratio of flagellomere I length to length of flagellomeres II+III: 0.97. Ascoids simple (Figs. 2–5), those of flagellomere II about 0.60 times as long as flagellomere and exceeding the level of the rosette-like papilla, implanted at different level, the external apical in origin as compared with the internal ascoid (Fig. 3); flagellomeres I and II (Figs. 2, 3 above), as well as flagellomere XII (Fig. 4, below) with rosette-like papillae, flagellomere XIII with a pair of ascoids and 7 rosette-like papillae (Fig. 5, above), and flagellomere XIV with 4 pairs of rosette-like papillae and no ascoids (Fig. 5, below); flagellomeres III (Fig. 3 below) and XI (Fig. 4, above) without rosette-like papilla. Palpal formula: 1.0: 2.7: 3.8: 3.2: 8.2 (Fig. 1). Newstead’s sensilla in a compact patch inserted at middle of the internal margin of palpus segment III (Fig. 7). Cibarium with small teeth laterally and bad defined teeth in the border (Fig. 6). Ventro-cervical sensilla present.
Thorax: katepisternal anterior pilosity and postalar seta absent. Wing (Fig. 8) as long as 3.9 its width; R1 ending between level of M3 and CuA1, delta positive but short. Abdominal sternum II (Fig. 9) as long as 1.4 its width, slightly sclerotized in the posterior corners in which there are 5+5 seta alveoli.
Terminalia (Fig. 11): Gonostyle long, about 0.5 the length of gonocoxite, with five spines having the following disposition: two apical, one basal and two intermediate regularly separated between each other; gonocoxite long and slender, about 4 times its width at the level of the basal setae tuft; basal tuft of four setae implanted in an obliquus linear elevation that seems like a dark line (Figs. 10, 11), and a group of perennial setae in the apical third (Fig. 11). Paramere (Fig. 10) simple, with the dorsal margin gently arcuate with the basal portion continuous with the arm; arm of paramere digitiform, not expanded, with round apex; dorsal margin with setae in the apical 0.75 of the arm portion. Paramere sheath triangular in lateral view, very slender (Fig. 10). Aedeagal ducts 3.7 as long as the sperm pump, with no expanded simple apices; lateral lobe 1.1 as long as gonocoxite, slender, without specialized setae; cercus pointed.
Measurements. See Table 1.
Female description. Paratype. Head (Fig. 12) in frontal view pyriform, ratio of head length (from vertex to distal margin of clypeus) to width: 1.25; vertex somewhat enlarged; setae alveoli patches of frons extending anteriorly at midline, meeting supra-ocular alveoli patches. Eyes normal, 1.12 the length of clypeus, and just a little longer than frons measured from vertex to the intra-ocular sutures; intra-ocular sutures 0.26 the frons width; intraocular distance 1.73 the eye width. Ratio of labrum length to head length: 0.52; ratio of labrum length to flagellomere I length: 0.79; ratio of flagellomere I length to length of flagellomeres II+III: 1.11. Ascoids simple (Figs. 13-16), those of flagellomere II about 0.76 times as long as flagellomere and exceeding the level of the rosette-like papilla, implanted at different level, the external apical in origin as compared with the internal ascoid (Fig. 14, above); flagellomere I and II (Figs. 13, 14 above), as well as flagellomere XII (Fig. 15, below) with rosette-like papillae, flagellomere XIII with a pair of ascoids and 6 rosette-like papillae (Fig. 16, above), and flagellomere XIV with 3 pairs of rosette-like papillae and no ascoids (Fig. 16, below); flagellomeres III (Fig. 14 below) and XI (Fig. 15, above) without rosette-like papilla. Palpal formula: 1.0: 2.3: 2.8: 2.45: 6.45 (Fig. 12). Newstead’s sensilla in a compact patch inserted at middle of the internal margin of palpus segment III (Fig. 17). Cibarium with small lateral teeth, 4 posterior teeth arranged diadem-like, and a central anterior long tooth horizontally directed, so it seems as an anteriorly displaced posterior tooth; cibarial pigmented area compact and cibarial arch bad defined at middle (Fig. 19). Pharynx with lateral spines and small spicules at middle (Fig. 18). Ventro-cervical sensilla present.
Thorax katepisternal anterior pilosity and postalar seta absent. Wing (Fig. 20) as long as 3.65 its width; R1 ending between level of M3 and CuA1, delta positive but short.
Abdominal sternum II (Fig. 21) as long as 1.1 its width, slightly sclerotized in the posterior margin and with 7- 8+7-8 seta alveoli. Genitalia: Spermatheca globular with terminal knob represented by filaments, and with transverse striations at base; spermathecal common duct very short, no longer than spermatheca; individual spermathecal ducts very long, about 5 times the length of the furca stem, and very slender all along, being about 0.25 the diameter of spermatheca (Fig. 22).
Measurements. See Table 2.
Etymology. The term Nahua applies to ethnic groups which apparently originate in Aridoamerica, in regions of the present day northwestern Mexico. They split off from the other Uto-Aztecan speaking peoples and migrated into central Mexico in the XII century. They settled in and around the Basin of Mexico and spread out to become the dominant people in central Mexico (Piña Chan 1960). The term also refers to the dominant language used by the Mexica Empire, and still in use by autochthonous Mexican people. Municipality of Naolinco was originally a Totonac emplacement but dominated by Mexicas before the XVI century and the Spanish arrival. The name Naolinco comes from nahuatl language, being a derivation formed by " Nahui " that means four, and " ollin ", that means movement of the earth or sky, and " Co ", which denotes a place, so it is interpreted as “the site of the four movements” (INAFED 2017).
Biological data. Micropygomyia nahua sp. nov. was collected in a peridomestic pile of clay tile to be used in the construction of a house roof. Specimens were found cohabiting the site with Lutzomyia (Lutzomyia) longipalpis (Lutz & Neiva, 1912), being the new species more abundant.
Micropygomyia Coquillettimyia nahua
! " # % & &
’ (& (& ((& " (&) (& (& ((& (& " (& ((& (% (&((" (* (& (& (& (& (& (& (& (& (& (& % (&((!(! (" ’ (&! (& (& (& (& (& (& (& (& (& % (&((
’ (& (& (& (& (& (& (& (& (& (& % (&((!(
’ &! & &) &(( &) & (&) &) &)! % (& () " / 0 ’ (& (& (&) (&) (& (&) (& ((&) (& " (&) % (&(" / 0 0 ’ (& (& (& (& (& (& (& (& (& (& % (&((! "
/ 0 (&((&((&((&((&((&((&((&((&((&(% (&((() "
/ 0 0 (& (& (& (& (& (& (& (& (& (& % (&((() "
/ 0 0 0 (& (&! (&! (& (&! (&! (&! (& (& (&! % (&((" (
/ 0 1 (& (& (& (& (& (& (& (& (& (& % (&((
/ 1 (& " (& (&! (& (& " (&) (& ((& (&! % (&("!) 2 3 # ’ (&) (&) (& " (&) (& " (& " (& " (& " (& " (& " % (&((
/ ’ &() &)(&" &)(&) &) &((&) &" &) % (&(!) / * (&) (& (& (& " (& (& (& " (& (& (& % (&(" ’ (& (&) (& (& (& " (& (& (& (& (& " % (&(" ’ (& ((& (& " (&) (& (& (& (& (& ((& % (&()!) "
’ (&) (& (& (& (&) (& (& (&) (& (& % (&(
’ 7(&(7(&(7(&(7(&(7(&((&((7(&(3(&((&(((&(% (&((!) " ’ & & (&((& " & (& (& & (& & % (&!)(
# ’ / (&) (& " (& ((& ((& ((& ((& " (& " (& " (&) % (&(
# * (&() (&() (&() (&() (&() (&() (&() (&() (&() (&()
’ (&) (&) (& " (&) (&) (& " (& " (& " (& " (& " % (&((!(
’ / (& (& (& (& (& (& (& (& (& (& % (&((()
’ (& ((&) (& " (&) (& " (&) (& " (&) (& " (&) % (&((!(! (" / ’ (& " (& " (& (& (& (& (&! (&! (& (& % (&(("!")
2 ’ (& (& (& ((& (& (& (& (& ((& ((& % (&(())(
2 * (&((&((&((&((&((&((&((&((&((&(% (&((
’ (& (& (& (& (& (& (& (& (& (& % (&(()!) (! 22:; ’</ = *<> =?? & <?? & # <= & & <: &
The following keys were prepared with the help of those presented by Galati (2003), Young & Duncan (1994) and Young & Perkins (1984).
Abbreviations: L= length; W= width; P1, P2, etc. = Paratype 1, 2, etc. x̅= media; s. d. = standard deviation.