Simulium (Hearlea) dalmati Vargas & Díaz Nájera

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 : 18

Simulium (Hearlea) dalmati Vargas & Díaz Nájera

Figs. 5J–M

Simulium (Hearlea) dalmati Vargas & Díaz Nájera, 1948: 337–341 , Figs. 47–56; 1955: 166, 169, 170, 171, 173, 290, Figs. 99–106; Díaz Nájera & Vulcano, 1962: 93, 122, Figs. 46–50.

Female: (Derived from Vargas & Díaz Nájera, 1948). Wing length, 3.5 mm. General coloration blackish, with golden pilosity. Scutum black with 1+1 silvery vittae, joining anteriorly with 1+1 silvery subtriangular spots. Legs yellowish, with apices of femora, tibiae, and tarsomeres black. Basal portion of cibarium smooth, with anterior margin thickened, gradually elevated sublaterally. Sc haired. Genitalia as in S. capricorne .

Male: Wing length, 3 mm. Coloration similar to that of female. Scutum black, with grayish pruinosity on anterior 1/3 interrupted medially. Sc with scarce hairs. Hind basitarsus 3.6 times longer than wide Ventral plate with short, haired, median carina.

Pupa: ( Fig. 5J ). Cocoon slipper shaped, coarsely woven, anterior margin reinforced. Length (at base), 5 mm. Gill ( Figs. 5K–M ) inflated, annulated, comprised of 3 branches; medial and ventral branches subequal in size; dorsal branch 0.4 mm, 1/4 or less length of other branches, directed posteromedially, accuminate apically ( Fig. 5K ); medial branch 1.4 mm, subcylindrical, capitate, directed anterolaterally, with 3–4 small apical protuberances ( Fig. 5K ); ventral branch 1.3 mm, laterally compressed, curved anteromedially, blunt apically, with one or more small apical protuberances ( Fig. 5L ). Frontoclypeus and thorax with few, iregularly sized granules.

Larva: Length, 9 mm. Coloration grayish green; cephalic apotome without headspots, slightly darkened mediobasally. Labral fan with 42–44 primary rays. Antenna as long as stalk of labral fan, median article with 2 whitish subannulations. Mandible with strong curvature on superíor side, with 6 internal and 2 marginal teeth, the last well developed. Ratio of antennal articles = 1:1.3–1.4:1.0–1.1 (proximal: medial: distal). Postgenal cleft gradually curved, with narrow apical incision. Hypostoma with anterior margin straight, 11–13 lateral setae per side, and 3+3 discal setae; median tooth longer than others; ratio of hypostoma/hypostomal bridge = 0.8. Posterior circlet with 144 rows of 21–23 hooks. Rectal papillae 18–24 lobules, consisting of large dorsal and 5–7 smaller ventral lobules per lobe.

Material examined: México, Veracruz, Cumbres de Alcutzingo , 1 pharate male, 1 larva (on slides), 2 pupae and 4 larvae, 31 August 1948, Cordova, ( MLP) leg. INDRE .

Distribution: México, Veracruz.

Discussion: The female is very similar to S. delatorrei and S. larvispinosum . The pupa is structurally close to S. canadense and S. burchi , but S. canadense has a slipper­shaped cocoon and S. burchi has a more anterodorsally directed, more finely woven cocoon. The larva is similar to that of S. ethelae , but the latter has 36–39 lobules (versus 18–24) on the rectal papillae. The larva of S. delatorrei is also similar but has 114 rows of hooks (versus 144) on the posterior circlet and 7–9 (versus 11–13) lateral hypostomal setae per side. Female of S. contrerense is very close, but silvery vittae of scutum not adjoining anteriorly, and the pupa gill has only 2 branches.

Figures

FIGURE 5. Pupa and respiratory organ. A, B. S. (H.) burchi; A. lateral view, B. dorsal view. C–F. S. (H.) delatorrei; D. in laterodorsal view; E. dorsal view, F. laterointernal view. G–I. S. (H.) estevezi, H. dorsal view, I. ventral view. J–M. S. (H.) dalmati, J. lateral view, K. dorsal view, L. frontal view. M. ventral view. N–O. S. (H.) juarezi, N. lateral view, O. dorsal view. (A, B–E, G–O same scale).