Simulium (Hearlea) delatorrei Dalmat
Creators: name: Coscarón, S.
name: Esquivel, D. R. Miranda
name: Moulton, J. K.
name: Arias, C. L. Coscarón-
name: Bernal, S. Ibañez
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Simuliidae
Simulium
Simulium delatorrei

description: Simulium (Hearlea) delatorrei Dalmat
Figs. 2F, 3C–E, I, 5C–F
Simulium (Dyarella) delatorrei Dalmat, 1950:137–147, Fig. 1–7.
Simulium (Hearlea) delatorrei Dalmat, 1951: 53; 1955: 253–258, Figs. 103–105, 223–225, 258, 311, 351, 389, 426; Vargas, Martínez Palacios & Díaz Nájera, 1957: 170, 172, 174, Figs. 107– 115; Díaz Nájera & Vulcano, 1962:93, Figs. 51–56.
Female: Wing length, 3.1 mm. General coloration dark brown, clothed with yellow to greenish pile, very similar to S. capricorne; scutum with 1+1 submedian silvery vittae extending from subtriangular anterior silvery spots to silvery pollinose prescutellar area, changing from whitish silver to black depending upon lighting. Frons convergent below, fronto­ocular triangle about as high than wide. Basal portion of cibarium smooth, with thin anterior margin and small median concavity (Fig. 2F). Sensory vesicle of maxillary palpus with abundant tubercles, ca. 1/2 of basal article length. Genitalia similar to those of S. capricorne.
Male: Wing length, 3.0 mm. General coloration similar to that of female. Eyes dark brown; scutum dark brown, bordered by silver pruinosity with anterior and posterior areas wider than lateral areas, scutum with abundant closely appressed silvery pilosity; (in specimens without pilosity, manipulation of light source enables vittae to be seen on gray tomentous pruinosity); pleurae brown, with silver pollinosity. Legs brownish, with long yellowish brown hairs. Abdomen brown blackish, with 1+1 silver spots laterally on tergites VI–VIII. Hind basitarsus 3.3 times longer than broad.
Pupa: (Figs. 5C–F). Cocoon slipper shaped, closed anteriorly, neatly woven (no evident threads), reinforced on anterior border (Figs. 5C, D). Length (basal) 3.2–3.3 mm; (dorsal) 2.5–2.8 mm. Frontoclypeus with abundant, small platelets laterally, continued medially by microscopic punctation, and 2+2 thin frontal and 1+1 stout, spine­like facial simple trichomes (Fig. 3I). Thorax with abundant, minute, rounded granules dorsally becoming more conical along midline; 5 simple, spine­like trichomes per side. Gill 1.8 mm, comprised of three branches; filaments stout, gradually tapered, pseudoannulated; medial branch largest, subcylindrical, apically blunt, directed anteriorly, with noticeable ventrolateral protuberance submedially; ventral branch 1/2 width of medial branch, curved medially; dorsal branch smallest, directed posteromedially. Abdominal tergite X lacking terminal spines.
Larva: (derived from Dalmat, 1955). Body length, 7 mm. General color gray, cephalic apotome darkened mediobasally. Labral fan with 39–40 primary rays. Postgenal cleft dome shaped, with deep anteromedian incision. Hypostoma with anterior margin straight and 7–9 lateral setae per side. Ratio of hypostoma/hypostomal bridge = 1.1. Mandible with 6 internal teeth arranged in 3 rows; 2 marginal teeth, second slightly longer than 1/2 length of first. Comb of prothoracic proleg lateral sclerite having 40–42 teeth. Posterior circlet with 114 rows of 19–22 hooks. Rectal papillae trilobed, with 24–25 lobules per lobe (72– 75 total).
Material examined: Guatemala: (Dalmat collection USNM) Totonicapan, río Samalá, 2 pupae (paratypes), 1 pupal exuvia (paratype), 8 April 1948; 1 pupa (paratype), 1 pupal exuvia (paratype), 5 October 1948; 2 pupal exuviae (paratypes), 5 March 1949; 1 male (allotype), 1 female (paratype), 15 March 1949; 1 male (paratype), 6 April 1949; 1 male (paratype), 13 April 1949; 1 female (paratype), 15 April 1949; 1 male (paratype), 6 October 1949; 2 females (paratypes), 6 October 1949; Chimaltenango, Acatenango, Aldea Los Pajales, río Cipres, 2 females (paratypes), 13 April 1949; 1 male, 3 females, 26 July 1949; 2 female, 9 August 1949; 2 females, 1 male, 18 August 1949; río Cocoyá, Fca. El Carmen, 5 females, 3 male, 1 April 1950; El Quiché: Chichicatenango, río El Molino, Fca. El Tesoro, 1 pupal exuvia (paratype), 13 December 1948; Sololá, Panajachel, río Catarata, 1 pupa (paratype, brocken), 9 October 1947; 1 male (paratype), 10 December 1947; río Sololá, 1 male (paratype), 6 April 1948; San Marcos, río Guatayil, Aldea El Chamaco, 1 pupa (paratype), 14 December 1947; río Samalá, 1 female (paratype), 19 March 1949; 1 female (paratype), 4 pupae, 11 October 1947; 1 pupa (paratype), 8 September 1948; Guatemala, (III) unknown locality 1 female pharate, 1 male, 7 pupae.
Distribution: Guatemala: Chimaltenango, El Quiché, Guatemala, Huehuetenango, Quezaltenango, Totonicapan, San Marcos, Sololá. México: Chiapas.
Discussion: The closest species is S. estevezi but differences in the pupa and larva permit their separation. An illustration of a larva identified as S. estevezi from Mexico (Díaz & Vulcano 1962) shows rectal papillae with only 5 lobules per lobe, differing considerably from Guatemalan populations (24–25 lobules per lobe).
description: Published as part of 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, pp. 1-52 in Zootaxa 396 on pages 19-20, DOI: 10.11646/zootaxa.396.1.1, http://zenodo.org/record/5227428