Simulium (Hearlea) temascalense Díaz Nájera & Vulcano

Coscarón, S., Esquivel, D. R. Miranda, Moulton, J. K., Arias, C. L. Coscarón- & Bernal, S. Ibañez, 2004, Simulium (Hearlea) Vargas, Martínez Palacios, & Díaz Nájera (Diptera: Simuliidae): Taxonomic revision and cladistic analysis, Zootaxa 396, pp. 1-52 : 33

Simulium (Hearlea) temascalense Díaz Nájera & Vulcano

Fig. 9J .

Simulium (Hearlea) temascalense Díaz Nájera & Vulcano, 1962: 102–105 , 140, 142, Figs. 89–105.

(Diagnosis of female, and pupa derived from Díaz Nájera & Vulcano, 1962).

Female: General coloration blackish. Scutum brown with 1+1 thin silvery vittae not adjoining anterior 1+1 subtriangular silvery spots. Pleurae black pollinose. Femora and tibiae yellowish, with black apices. Meso­ and metathoracic coxae, trochanter, tarsomeres I–II, and apex of tarsomere III black. Cibarium with smooth, thickened, medially concave anterior margin. Genitalia as in S. larvispinosum .

Male: unknown.

Pupa: Cocoon (at base), 3 mm. Frontoclypeus and anterodorsum of thorax without platelets. Gill with general facies of S. carolinae , with dorsal branch elongate, relatively thin, with accuminate, spinulate apex, and seven small subbasal branches and a more distal one that is curved and directed posteroventrally; apex of branches spinulate.

Larva: Length (mature), 8 mm. Coloration dark greenish; head yellowish, cephalic apotome without noticeable headspots. Labral fan with 50 primary rays. Mandible with strong preapical tooth, two rows of internal teeth, and 2 large marginal teeth; lateromandibular process long and curved. Ratio of antennal articles = 1:1.6:1.2 (proximal: medial: distal). Comb of thoracic proleg sclerite with 38–39 teeth arranged in 10 groups. Hypostoma with anterior margin curved, median tooth longer than other teeth, and 15 lateral setae per side; ratio of hypostoma/hypostomal bridge = 0.8; postgenal cleft mildly curved apically, without accuminate anteromedian incision. Sternite VIII with 1+1 sublateral, sclerotized papillae. Posterior circlet with 242 rows of 26–30 hooks. Posterior portion of abdomen with 2+2 dorsolateral accuminate posteriorly directed processes, 1+1 wide ventrolateral positioned processes having small lateral projections ( Fig. 9J [dd and vl]); 1+1 dorsolateral flattened plates and 1+1 ventrolateral papillae; ventral struts of anal sclerite encircling posterior circlet. Rectal papillae trilobed, with 7–9 lobules per lobe (21–27 total).

Material examined: México, Oaxaca, San Felipe del Agua , 1 larva, October 1948, Cordova ( MLP) leg. INDRE .

Distribution: México: Michoacan, Oaxaca

Discussion: Simulium johnsoni and S. larvispinosum have very similar pupal gills, but their larvae lack ventrolateral papillae on segment VIII and their females have a darker scutum.

Figures

FIGURE 9. A–J. Anal sclerite and accessory plates of larva. (d = dorsal branch of anal sclerite; v = ventral branch of anal sclerite; ds = dorsolateral conical accessory plate single; dd = dorsolateral conical accessory plates double; vl = ventrolateral accessory plate; df = dorsolateral flattened accessory plate). A. S. (H.) capricorne; B, C. S. (H.) paracarolinae B. dorsal view (cleared), C. posterodorsal view; D–F. S. (H.) gorirossiae D. posteroventral view, E. posterodorsal view, with rectal papillae (ap); F. ventrolateral papillae (vp) of segment VIII, sclerotized apical region; G. S. (H.) larvispinosum, lateral view, H. dorsal view, I. ventral view (cleared), J. S. (H.) temascalense. lateral view. (B, H, J) and (C, D, E) same scale respectively.