Wyeomyia (Hystatomyia) intonca Dyar & Knab
Creators: name: Porter, Charles H.
name: Wolff, Marta I.
name: E
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Culicidae
Wyeomyia
Wyeomyia intonca

description: Wyeomyia (Hystatomyia) intonca Dyar & Knab
(Figs. 3–6)
Wyeomyia intonca Dyar & Knab, 1910: 173. Holotype ɗ, Empire, Canal Zone, Panama (USNM); examined. Synonymy with Wyeomyia (Dendromyia) circumcincta Dyar & Knab by Lane, 1945: 146. Resurrected from synonymy and placed in subgenus Hystatomyia by Judd, 1998: 579.
Hystatomyia intonca: Dyar, 1919: 141, Pl. V (Fig. ɗ G).
Wyeomyia (Hystatomyia) intonca: Dyar, 1923: 170 (Panama: list); Dyar & Shannon, 1924: 91 (Panama; list); Bonne & Bonne­Wepster, 1925: 59,76 (Canal Zone; A key).
Prosopolepis (Hystatomyia) intonca: Dyar & Shannon, 1924: 482 (list); Dyar, 1925: 120, 124 (Panama; collection records; L bionomics; ɗ G key).
Dendromyia intonca: Dyar, 1926: 43, 44 (L description, bionomics); del Ponte, 1939: 540 (A).
Dendromyia (Hystatomyia) intonca: Dyar, 1928: 84, Pl. XVIII (Fig. ɗ G, L; Ψ, ɗ, L; L bionomics).
Wyeomyia (Dendromyia) intonca: Edwards, 1932: 88 (Panama; list); Lane & Cerqueira, 1942: 606 (tentative synonym of circumcincta Dyar & Knab); Lane, 1945: 146 (synonym of circumcincta Dyar & Knab); Lane, 1953: 975 (synonym of circumcincta Dyar & Knab). Knight & Stone, 1977: 328 (synonym of circumcincta Dyar & Knab; info. on type).
Wyeomyia (Hystatomyia) sp. D =? intonca: Heinemann & Belkin, 1978: 124, 160, 166. 194 (Panama; collection records; L bionomics).
Life stages as described for Wy. chocoensis with following exceptions:
MALE. Head: Frons with prominent puncture slightly below postfrontal suture. Ventral surface of proboscis with bright white scales from base to about 0.6 length where white scaling expands slightly (preapical patch) to ventrolateral margin; white scaling ends at about 0.75, replaced by dark scales to distal end. In many specimens, white scales are absent or very reduced slightly basad of preapical patch of white scales. Proboscis (P) (1.37–1.58 mm, mean 1.50 mm, n 5) longer than antennae (flagellum [F] 1.13–1.35 mm, mean 1.27, n 5), mean P:F, 1.18 (n 5), but shorter than forefemur, mean P:Fe­I 0.79 (n 5). Pedicel with 4–8 small setae dorsomesad. Flagellomere 1 with a primarily dorsomesad cluster of 5–10 scales; among 5 specimens (10 antennae) flagellomere 5 (Flm5) quite uniform in length (0.08 mm), flagellomeres 12 and 13 more variable (Flm12 0.10–0.14 mm, mean, 0.12; Flm13 0.16–0.20 mm, mean 0.19); mean Flm13:Flm5 2.29. Thorax: Integument brown. Supraalar and antealar areas have combined sum of 22–33 (mean 27, n 5) dark brown setae. Mesopostnotum brown with medial cluster of 6–9 (mode 8) pale, occasionally dark, setae. Prealar area with 3–5 yellow setae. Legs: Forefemur slightly longer than foretibia (mean Fe­I:Ti­I 1.04, n 5); forefemur somewhat shorter than midfemur (mean Fe­ I:Fe­II 0.89, n 5) but longer than hindfemur (mean Fe­I:Fe­III 1.25, n 5); forefemur longer than proboscis (mean Fe­I:P 1.26, n 5); ventral surface of forefemur with white scales over basal 0.2, white scaling tapers to rather narrow line at about 0.4 and continues as narrow line along posteroventral surface to apex; posteroventral surface of foretarsomere 1 (Ta­I1) with white scales confined primarily to basal 0.5 and with darker scales with metallic reflection distally, in some specimens white scales extend as narrow line to distal end. Midfemur distinctly longer than midtibia (mean Fe­II:Ti­II 1.51, n 5); posteroventral surface of midtibia and basal 0.3–0.6 of midtarsomere 1 (Ta­II1) with bright white scales; midtarsomere 2 (Ta­II2) primarily with bright white scales, extent of basal dark scaling quite variable but more extensive on posteroventral surface (0.4–0.6 length of Ta­II2) than on anteroventral surface (0.2–0.3 length of Ta­II2), dorsal surface often with white scales over entire length, but may be diminished or even replaced by dark scales over basal 0.2. Ungues of midtarsomere 5 dissimilar; larger unguis stout, dark, curved sharply to about 90° angle, tip blunt with apical spur. Hindfemur slightly longer than hindtibia (mean Fe­ III:Ti­III 1.04, n 5), hindtarsomere 1 slightly longer than hindfemur (mean Ta­III1:FeIII 1.08, n 5), ventral surface of Ta­III1 often with narrow line of white scales to ~0.75 length or with scattered white scales to near distal end. Ungues of hindtarsomere 5 slender, unequal; longer unguis 0.08 mm, about 2x length of shorter, with moderate to slight curvature; shorter unguis often strongly curved near base. Wing: 1.97–2.25 mm (mean 2.13 mm, n 5). Abdomen: Lateral margins of abdomen with creamy white scales, which form an essentially straight line along abdomen; sterna covered with creamy white scales. Distal margin of sterna II–V with about 7–12 small pale setae, more numerous and longer pale setae along distal margin of sterna VI (~19) and VII (~24). Genitalia (Fig. 3 C­G): Tergum VIII (ventral in position) narrow, 3.4–4.7x as wide as long; covered with small spicules, which become minute and very numerous basally although basal 0.3–0.5 glabrous; distal margin straight, 3 irregular rows of long dark setae (range 38–41, mean 40, n 6) along and near distal margin, longest setae about 2.1–2.5 times length of tergum VIII along median plane. Sternum VIII (dorsal in position) with distal margin somewhat convex; setae (range 23–27, mean 25, n 6) dark, arranged primarily as single row along distal margin; a few scales along lateral margins pale, rest dark. Tergum IX bearing 3, rarely 2, stout but relatively short setae on either side of narrow median bridge, apices of setae bent slightly laterad. Sternum IX narrow but expanded medially, becoming bell­shaped between base of gonocoxites; appears to be fused basally to gonocoxites; with rather broad U­shaped mesal membranous area; quite densely spiculate. Gonocoxite elongate, expanded basally; sternal basal surface spiculate with rather sparse covering of scales, an irregular row of setae just proximal to basal mesal setal clusters of tergum. Distal 0.5 of gonocoxite slender, distinctly bowed; mesal surface with slender setae distally that merge with dense subapical/ apical cluster of dark setae (0.2–0.3 length of gonocoxite); setae on or near mesal margin curved distally toward median plane of genitalia. Tergal surface of gonocoxite with 4 prominent clusters of setae (3 occur close together in a basal mesal position): (1) basalmost cluster comprised of 10–13 (mean 11) unmodified, moderately developed pale setae; (2) adjacent to this cluster (slightly mesad and distal to it) is a group of 11–15 (mean 14) stout, rather long setae (~ 0.4 length of gonocoxite) with golden reflection, which terminate in curved spathe­like apex (a few smaller unmodified setae occur along edge of this cluster); (3) ventral (prerotation sense) and often slightly distal to these setae is a third group of 9 (rarely 10) somewhat longer (~ 0.5 length of gonocoxite), lanceolate­shaped setae with golden to copper reflection, these setae become slightly broader subapically before bending sharply and narrowing to a fine tip; (4) fourth prominent cluster of setae laterad to three basal mesal clusters, usually consists of 28–41 (mean, 34) unmodified pale setae, longest often extending slightly beyond tip of gonocoxite. Gonostylus (Fig. 3 D) arises basally on gonocoxite near mesal margin of lateral setal cluster; the glabrous and relatively transparent gonostylus extends mesally, then curves distally and becomes broader; expanded apical area about 3x width of basal portion (stem). Aedeagus slightly longer than wide; submedian tergal arms bend toward each other resembling an upsidedown V, in some individuals the arms appear to be joined medially but in others they appear to remain slightly separated. Proctiger (in lateral view) with broad basal sclerotization of tergum X, paraproct with rounded apex and bearing 4–7 cercal setae.
FEMALE. Like male except for sexual characters as follows. Head: Ventral surface of proboscis often entirely dark scaled with exception of small cluster of white scales (preapical patch) from 0.6–0.7 length of proboscis; less frequently a narrow line of white scales extends from base of proboscis to preapical patch. Thorax: Integument light brown to brown. Legs: Resembling male but with several differences. Dorsal surface of midtarsomere 1 (Ta­II1) with dark scales, white scales limited to basal 0.3 of posteroventral surface, most numerous on basal 0.1; midtarsomeres 2–5 (Ta­II2–5) (Fig. 6 A) with dark scales with metallic reflection, a few pale and white scales may be present near basal and/or distal end of Ta­II2–4; Ta­II5 with variable amount of pale scaling. Genitalia (Fig. 5 A­D): Tergum VIII wider than long (width 0.43–0.48 mm, length along median plane 0.17–0.19 mm, n 2); covered with minute spicules and spatulate scales; distal margin slightly concave; setae confined to distal 0.5, most numerous along and near distal margin, absent from lateral margins, in total about 46–54 setae. Distal margin of sternum VIII with numerous strong, straight to slightly curved setae, which expand basally to form a mesal V­shaped cluster; in total about 55–69 setae. Insula wider than long, covered with moderately long spicules; apex broadly rounded to rather truncate, irregular anterolateral row of 5 or 6 small setae on either side of midline; mesal semicircular depression or cavity opening onto basal margin, prominent spicules along lower edges of opening. Dorsal postgenital lobe length 0.11 mm, dorsal postgenital lobe index 1.83–1.87 (see Reinert, 1974). Cercus rather flat; covered with minute spicules; apex rather truncate; dorsal surface with 12–16 setae, longest 0.6– 0.7 length of dorsal postgenital lobe.
PUPA (Fig. 3 A,B). Position and character of setae as figured; numbers of branches presented in Table 3. Cephalothorax: Tan with very pale to clear patches, especially along dorsal margin of scutal protrusion at base of trumpet. Seta 4­CT usually with 3 or 4 branches. Metathoracic wing tan with pale markings comprised of submedial pale spot and a slightly pale spot on each lateral margin. Trumpet: Length 0.84–1.26 mm (mean 1.08 mm, n 8); tan, darkest basally, distal end not quite as dark and slightly flared, medial portion similar in color to distal end or slightly paler. Abdomen: Abdominal tergum I rather uniformly tan although seta 6,7­I and occasionally 4,5­I within a pale spot. Seta 1­I well developed, most often with 18 or 19 branches. Seta 3­I moderately developed, usually double; seta 3­IV–VI about one­third the length of 3­III, 3­IV with 3 or 4 branches, 3­V usually 4­branched, 3­VI 2–4­branched. Seta 5­I single, infrequently double; seta 5­II,III relatively small (approx. 0.2 mm), usually 4­branched; 5­IV–VI single, very long (approx. 1.1–1.2 mm). Puncture near seta 4­III–V, usually located distolaterad of seta 4­III,IV and basal mesal to seta 4­V. Paddle: Pale tan, somewhat darker along midrib. Male genital lobe: Large (length [l] 0.57–0.62 mm, mean 0.60 mm, n 8; width [w] 0.50–0.54 mm, mean 0.52 mm, n 8; mean l:w 1.14, range 1.11–1.16) with elliptical­shaped apex; distinctly broader than combined width of paddles.
Cephalothorax Abdominal segments
Seta no. CT I II III IV V VI VII VIII
0 – – 1 1 1 1 1 1 1 1 Range followed in parenthesis by mode; based on 8 specimens (16 setae). 2 One exception from number in parenthesis.
3 Very small, occasionally with seta with 1 or 2 branches.
Head Thorax Abdominal segments 1 Range followed in parenthesis by mode; based on 8 specimens (16 setae). 2 One exception from number in parenthesis.
FOURTH­INSTAR LARVA (Fig. 4). Position and character of setae as figured; numbers of branches presented in Table 4. Head: Dorsomentum with 1 large central tooth and 9–11 pairs of smaller lateral teeth. Maxilla: Maxillary brush quite long, maxillary brush spicules similar in length to seta 4­Mx (0.23 mm). Seta 1­Mx short, stout (0.015 mm); seta 2­Mx very slender, approx. 0.025 mm in length, basal to 1­Mx. Mandible: Mandibular rake comprised of approximately 8 stout spicules, each about 0.12 mm in length. Antenna: Short (mean 0.29 mm, n 10), slender; seta 1­A 2­branched (rarely single), borne dorsally about 0.68 (mean of 10) length and usually not quite reaching tip of antenna. Thorax: Seta 14­P single, sometimes forked or 2­branched. Seta 2­M less than 0.5 length of 3­M, base of 2­M slightly narrower than base of 3­M; 7­M about 0.25–0.33 length of 5­M; 9,10­M long, similar in length. Abdomen: Seta 2­I laterad of 1­I, stout, often 2­branched; 2­II usually single, basal to 1­II; 2­III–VII distinctly mesad of 1­III–VII. Seta 3­I more than twice length of 2,4­I; 6­VII 4–6­branched, rather short; 10­VI usually 4­branched. Seta 11­I prominent, stellate, branches similar in length to those of 13­I. Segment VIII: Comb scales in 4 or 5 irregular rows (mean number of scales 69, range 58–76, n 9). Seta 2­VIII single, rather long, about 0.5 length of siphon. Siphon: Long, slender (mean length 1.17 mm, range 1.04–1.28 mm, n 12) usually somewhat curved distally, wider at base, lightly pigmented with subapical region of darker pigmentation and basal edge quite dark, surface smooth; siphon index 7.8–8.9 (mean 8.2, n 11). Pecten comprised of 5–8 (mode 6, n 12) spine­like spicules, somewhat fringed apically; basal spicule close to seta 1­S, often slightly distal to it. Seta 1­S usually with 3 or 4 branches; located basally at about 0.13 (mean of 12) of siphon’s length. Ventral accessory setae (1a­S) unbranched, arranged in 2 rows; number of setae in 2 rows combined 12–16 (mean 14, n 12); length of distal­most seta usually slightly shorter than distance of seta to distal end of siphon. Dorsal accessory setae (2a­S) unbranched, infrequently a distal seta is forked; arranged in 2 rows; number of setae in 2 rows combined 11–19 (mean 17, n 14); basal­most seta approximately same length as third and fourth setae from base; distal seta not extending to tip of siphon. Segment X: Saddle tan, similar in color to darkened subapical area of siphon; extending near to ventral surface, mean length of 0.22 mm (n 12) measured dorsally. Setae 1– 3 ­X well developed; setae 1,3­ X 2 ­branched, all long; 2­X 3­branched, smallest (upper) branch about 0.4–0.8 length of middle branch, which is quite variable, and about 0.25–0.33 length of lower branch; seta 4­X 7–10­branched (mode 8,9, n 23), about 0.30 mm in length.
BIONOMICS. Wyeomyia intonca originally was described from a male, which had been collected as a larva or pupa from a bromeliad on a fallen tree at the edge of Comacho river, Canal Zone, Panama (Dyar & Knab, 1909). In 1925 Dyar indicated larvae of Wy. intonca occur in Tillandsia, and in 1926 published a brief description of the larval stage from specimens found in “wild pineapple, Ananas magdalenae (André) Standl. ” These plants were found in “jungle, some three miles back of Fort Randolph on the Atlantic side of the Isthmus.” Heinemann & Belkin (1977a, b, 1978) reported collections of Wy.? intonca (3 different forms designated D, G and H) from 15 bromeliad samples (Panama, 5; Costa Rica, 9; and Nicaragua, 1), which were primarily from forested areas at elevations of 100 m and 500– 700 m. However, only Wy. (Hystatomyia) sp. D appears to correspond with Wy. intonca, and it was encountered only in Panama. Our collections, upon which the redescription is largely based, were from the northern Pacific Coast of Colombia, specifically Ensenada de Utria and southward to Jurubida. In this region, Wy. intonca was closely associated with coastal mangroves, which tended to be quite variable with respect to dominant tree species. Piñuelo mangrove dominated by Pelliciera rhizophorae Tr. & Pl. (Pellicieraceae) and with numerous tank bromeliads (dominants include: Werauhia ringens [Griseb.] J.R. Grant, W. sanguinolenta [Linden ex Cogniaux & Marchal] J.R. Grant, and W. gladioliflora [H. Wendland] J.R. Grant) appeared to be a particularly suitable habitat for Wy. intonca. This mosquito also was abundant in red mangrove dominated by Rhizophora harrisonii Leechm. and R. mangle L. (Rhizophoraceae); dominant tank bromeliads include W. sanguinolenta, W. gladioliflora, W. kupperiana (Suess.) J.R. Grant, and Aechmea pubescens Baker. Within these mangroves, larvae of Wy. intonca were found in tank bromeliads located from 0.6 to 2.5 m above ground and were found primarily in larger plants, i.e., those with 0.5 to 1+ liters of water. Wyeomyia intonca was not encountered in bromeliads from forested areas adjacent to these mangroves, even though sampling was quite extensive.
DISTRIBUTION. Collection records from Panama suggest the distribution of Wy. intonca extends from the Canal Zone to Colombia. At present, the known distribution of this mosquito in Colombia is limited to our collections from the northern Pacific Coast of the Department of Chocó (Ensenada de Utria and southward to Jurubida).
MATERIAL EXAMINED.
Sixty­seven specimens (22ɗ, 4Ψ, 10ɗG, 3ΨG, 4Le, 15Pe, 9L), including 4 complete and 11 partial individual rearings. Holotype, ɗ, genitalia on microscope slide, PANAMA: DK, 5­09, Type No. 12744 U.S. N.M. (red tag). Non­types, PANAMA: Canal Zone, Gatun, Jan. 1928 (1ɗ 1ɗG 1LePe ɗ 11146­m with dissected genitalia), (C.H. Bath Coll.), (blue tag). COLOMBIA: Chocó, Ensenada de Utria (6°03.1'N 77°21.5'W), 18­II­1999 (3ɗ 1Ψ 1ΨG 2LePeɗ 1Peɗ 1L – CO1143­3, ­4, ­6, ­101 with dissected genitalia, ­102), 0–10 m, hbt: Werauhia sanguinolenta (Linden ex Cogniaux & Marchal) J.R. Grant, (Wolff & Porter); same locality, 18­II­1999 (1L – CO1144­19), 0–10 m, hbt: Werauhia sanguinolenta (Linden ex Cogniaux & Marchal) J.R. Grant, (Wolff & Porter); same locality, 18­II­1999 (1L – CO1145­8), 0–10 m, hbt: Guzmania scherzeriana Mez, (Wolff & Porter); same locality, 18­II­1999 (1ɗ 1ɗG 1Peɗ 1L – CO1147­8, ­ 103 adult on microscope slide with dissected genitalia), 0–10 m, hbt: Guzmania scherzeriana Mez, (Wolff & Porter); same locality, 18­II­1999 (1ɗ 1Peɗ 1L – CO1148­8, ­104), 0–10 m, hbt: Werauhia ringens (Griseb.) J.R. Grant, (Wolff & Porte r); same locality, 18­II­1999 (3ɗ 1ɗG 1Ψ 1LePeɗ 1Peɗ – CO1149­25, ­112, ­114 with dissected genitalia, ­121), 0–10 m, hbt: Werauhia ringens (Griseb.) J.R. Grant, (Wolff & Porter); same locality, 24­VI­1999 (2ɗ 1Peɗ – CO11106­5, ­101), 0–10 m, hbt: Werauhia sanguinolenta (Linden ex Cogniaux & Marchal) J.R. Grant, (Wolff & Porter); same locality, 27­VI­1999 (1ɗ 1Peɗ 2L – CO11171­14, ­118), 0–10 m, hbt: Werauhia ringens (Griseb.) J.R. Grant, (Wolff & Porter); same locality, 27­VI­1999 (1ɗ 1ɗG 2L – CO11172­4, ­ 21 adult on microscope slide with dissected genitalia), 0–10 m, hbt: Werauhia ringens (Griseb.) J.R. Grant, (Wolff & Porter); Chocó, Ensenada de Utria (6°01.3'N 77°21.0'W), 20­II­1999 (1ɗ – CO1175­4), 0–10, hbt: Werauhia gladioliflora (H. Wendland) J.R. Grant, (Wolff & Porter); Chocó, Nuquí, Jurubida, Río Chori (5°50'N 77°17'W), 19­II­1999 (7ɗ 5ɗG 2Ψ 2ΨG 4Peɗ 1PeΨ – CO1170­ 104 adult on microscope slide with dissected genitalia, ­ 119 adult on microscope slide with dissected genitalia, ­103, ­112 with dissected genitalia, ­114 with dissected genitalia, ­ 116 adult on microscope slide with dissected genitalia, ­ 120 adult on microscope slide with dissected genitalia, ­137, ­144, ­145, ­148 with dissected genitalia), 0–10 m, hbt: Werauhia sanguinolenta (Linden ex Cogniaux & Marchal) J.R. Grant, (Wolff & Porter).
description: Published as part of Porter, Charles H., Wolff, Marta I. & E, 2004, A new species of Wyeomyia (Hystatomyia) (Diptera: Culicidae) from Colombia and a redescription of Wy. (Hystatomyia) intonca Dyar & Knab, pp. 1-31 in Zootaxa 477 on pages 17-25, DOI: 10.5281/zenodo.157376