Dasyhelea eloyi Díaz & Ronderos, 2013

DIAZ, FLORENTINA, RONDEROS, MARIA M., SPINELLI, GUSTAVO R., FERREIRA-KEPPLER, RUTH L. & TORREIAS, SHARLANE R. S., 2013, A new species of Dasyhelea Kieffer (Diptera: Ceratopogonidae) from Brazilian Amazonia, Zootaxa 3686 (1), pp. 85-93 : 86-93

publication ID

https://doi.org/ 10.11646/zootaxa.3686.1.5

publication LSID

lsid:zoobank.org:pub:6BF4C4E2-BDF9-4B2E-BA3D-2EB740BE82C3

persistent identifier

https://treatment.plazi.org/id/03EEA842-FFC1-FF9C-5396-330CFB26FEFA

treatment provided by

Felipe

scientific name

Dasyhelea eloyi Díaz & Ronderos
status

 

Dasyhelea eloyi Díaz & Ronderos View in CoL sp. n.

( Figs. 1–39 View FIGURES 1–17 View FIGURES 18–24 View FIGURES 25–30 View FIGURES 31–38 View FIGURE 39 )

Diagnosis. Male: only Neotropical species of the grisea group with posterolateral arms of the aedeagus subparallel and each arm with its distal portion abruptly recurved anteroventrally and a pointed tip. Female: only Neotropical species of the grisea group with the frontal sclerite trilobed and with a long and slender ventral projection. Larva: only Neotropical species of the grisea group with the palatum bearing 3 pairs of sensilla campaniformia and 3 pairs of sensilla coeloconica, and the scopae well developed. Pupa: only Neotropical species of the grisea group with the respiratory organ with 16–18 apical and 6–8 lateral pores and the ventrum of the head with one ocular sensillum.

Description. Male adult. Similar to female with usual sexual differences. Flagellum as in Fig. 1 View FIGURES 1–17 . Palpus ( Fig. 2 View FIGURES 1–17 ) with third segment bearing scattered sensilla; PR 3.00. Scutellum with 10 stout setae, 2 thinner ones. Wing ( Fig. 3 View FIGURES 1–17 ) length 1.08 mm, width 0.33 mm, CR 0.42. Genitalia ( Figs. 4 View FIGURES 1–17 , 31 View FIGURES 31–38 ): tergite 9 rounded distally, extending to level of apex of gonocoxites; apicolateral process elongate, slender, with apical seta; cercus small, with 3–4 setae; sternite 9 ( Fig. 32 View FIGURES 31–38 ) 0.30 X longer than greatest width, posteromedian projection rounded. Gonocoxite stout, 1.52 X longer than greatest width, with blunt anteromedian process; gonostylus 1.31 X longer than gonocoxite, wide base, curved, apex with pointed tooth. Parameres ( Fig. 33 View FIGURES 31–38 ) asymmetrical, right one large; gonocoxal apodeme stout, curved; one not contacting, other narrowly contacting with paramere, latter elongate, slightly curved mesally, with blunt apex. Aedeagus ( Fig. 34 View FIGURES 31–38 ) with anterior margin excavated, 0.70 X longer than greatest width, basal arch extending to 0.21 of total length; basal arms slender, directed lateral; posterolateral arms subparallel, each arm with distal portion abruptly recurved anteroventrally with pointed tip.

Female adult ( Fig. 5 View FIGURES 1–17 ): Head dark brown. Eyes contiguous by width of 1–2 ommatidia. Flagellum ( Fig. 6 View FIGURES 1–17 ) brown; AR 0.75–1.17 (0.87, n=5). Frontal sclerite ( Fig. 7 View FIGURES 1–17 ) trilobed, with long, slender ventral projection. Clypeus ( Fig. 8 View FIGURES 1–17 ) with 8 pairs of setae. Palpus ( Fig. 9 View FIGURES 1–17 ) brown; third segment with 6–7 capitate sensillae on basal 2/3, PR 2.25–2.71 (2.48, n=5). Thorax: ( Fig. 10 View FIGURES 1–17 ). scutum dark brown, scutellum brown, with 10–11 stout setae, 5–6 thinner ones. Legs ( Fig. 10 View FIGURES 1–17 ) pale brown, femora, foretibia with mesal dark band, knees darkish, tarsomeres 4–5 slightly infuscated; hind tibial comb with 6 spines; prothoracic TR 2.12–2.30 (2.22, n=5), mesothoracic TR 2.17– 2.32 (2.25, n=5), metathoracic TR 2.25–2.45 (2.37, n=5). Wing ( Fig. 11 View FIGURES 1–17 ), length 0.96–1.14 (1.05, n=5) mm, width 0.39–0.45 (0.41, n=5) mm, CR 0.47–0.51 (0.50, n=5); membrane hyaline, densely covered with macrotrichia; cubital fork at level of end of first radial cell. Halter dark brown. Abdomen: Dark brown. Subgenital plate ( Fig. 12 View FIGURES 1–17 ) arrow-shaped, posteromedial portion broad basally, narrowed at midlength, distally broad with pointed tip; posterolateral arms stout, curved. Spermatheca round ( Fig. 12 View FIGURES 1–17 ), strongly pigmented, diameter 6.25 µ, neck long, stout, oblique, measuring 3.75 µ.

Fourth instar larva. Head capsule pale brown, short, wide, tapering to apex ( Figs.13 View FIGURES 1–17 , 18–21 View FIGURES 18–24 ); chaetotaxy as in Fig. 18 View FIGURES 18–24 ; HL 0.288 –0.348 (0.318, n=4) mm, SEM 0.260 –0.310 (0.283, n=3) mm; HW 0.204 –0.216 (0.207, n=4) mm, SEM 0.18–0.19 (0.183, n=3) mm; HR 1.50–1.73 (1.63, n=4); SGW 0.096 –0.120 (0.108, n=4) mm, SEM 0.140 (n=3) mm; SGR 1.60–1.88 (1.81, n=4). Antenna short ( Figs. 19–20 View FIGURES 18–24 ). Labrum 1.82 times longer than wide ( Figs. 18–20 View FIGURES 18–24 ); anterior portion of palatum ( Figs. 20–21 View FIGURES 18–24 ) with 3 pairs of campaniformia ( Figs. 20–21 View FIGURES 18–24 ), posterior portion with 3 pairs of sensilla coeloconica, mesal one serrate ( Figs. 19–21 View FIGURES 18–24 ); messors ( Figs. 21–22 View FIGURES 18–24 ) well developed, scopae ( Figs. 21–22 View FIGURES 18–24 ) well developed with 4–6 strong, lanceolate teeth. Mandible ( Figs. 19–21 View FIGURES 18–24 ) stout, heavily sclerotized, with 4 teeth, apical tooth more elongated, proximal tooth minute; MDL 0.034 –0.044 (0.040, n=4) mm. Maxilla ( Fig. 19 View FIGURES 18–24 ) heavily sclerotized; galeolacinia ( Figs. 20–21 View FIGURES 18–24 ) with long, thin seta and flaplike lobe, lacineal sclerite 1 with stout, short seta; maxillary palpus ( Figs. 19–21 View FIGURES 18–24 ) short, button-like, with 3–4 small papillae. Hypostoma ( Figs. 13 View FIGURES 1–17 , 19, 21 View FIGURES 18–24 ) heavily crenulated, bearing 11–12 strong, lanceolate teeth. Epipharynx ( Figs. 13–14 View FIGURES 1–17 ) massive, heavily sclerotized, with large, strong teeth, lateral arms stout; LAW 0.096 –0.132 (0.114, n=4) mm, DCW 0.048 –0.060 (0.054, n=4) mm. Hypopharynx ( Figs. 13–15 View FIGURES 1–17 ) stout, heavily sclerotized, posterior comb straight with fringe, labium sclerotized. Thoracic pigmentation diffuse, pale brown. Abdominal segments whitish, with diffuse pale brown pigmentation. Caudal segment ( Figs. 23–24 View FIGURES 18–24 ) with anterior ring of short spines, 3 pairs of short, stout, brown hooks with pointed tip, 3 pairs of elongate, slender, pale brown hooklets with recurved tip. CSL 0.396 mm, CSW 0.168 mm, CSR 2.35.

Female pupa. Total length 2.310 –2.970 (2.730, n=4) mm. General coloration of exuviae pale brown. Dorsal apotome ( Fig. 16 View FIGURES 1–17 ) 2.50 X broader than long, apex rounded, surface covered with small rounded tubercles, anterior margin slightly concave, disc with 2 pairs of raised, wrinkled areas; dorsal apotome sensilla ( Fig. 16 View FIGURES 1–17 ) one long, thin, located on well developed tubercle, one campaniform sensillum; posterior margin rounded with 2 stout, rounded tubercles, one subapical, other apical; DAL 0.108 –0.120 (0.114, n=2) mm; DAW 0.240 –0.300 (0.27, n=2) mm; DAW/DAL 2.22–2.50 (2.36, n=2). Cephalothorax surface with small rounded tubercles, length 1.13 (1.05 – 1.20, n=4) mm, width 0.69–0.75 (0.72, n=4) mm. Cephalothoracic sensilla as follows ( Fig. 17 View FIGURES 1–17 ): three dorsolateral cephalic sclerite sensilla two short setae, one campaniform sensillum; two anterolateral sensilla, one long, thin, seta, one campaniform sensillum; two anteromedial sensilla, one long, thin seta, one short seta; three dorsal sensilla, ( Fig. 35 View FIGURES 31–38 ): D-1-T short, thin seta, D-3-T campaniform sensillum, D-5-T peg, SA-2-T supraalar campaniform sensillum ( Fig. 35 View FIGURES 31–38 ). Respiratory organ nearly straight, 7.66 X longer than broad, with scale-like spines, with 16–18 apical and 6–8 lateral pores; RO length 0.264 –0.288 (0.273, n=4) mm, RO width 0.036 (n=4) mm; pedicel (P) pale brown, smooth, short, pedicel length 0.012 (n=4) mm, P/RO 0.041 –0.052 (0.045, n=4) mm. Two long, thin clypeal/labrals ( Fig. 36 View FIGURES 31–38 ); one ocular sensillum ( Fig. 36 View FIGURES 31–38 ). Abdominal segments covered with small spinules. First abdominal segment ( Fig. 37 View FIGURES 31–38 ) with sensilla as follows: one D-2-I peg; D-4-I, D-7-I minute setae; L-1- I, L-2-I, L-3-I short, thin setae. Second abdominal segment similar to first, except three posterior setae, two campaniform sensilla, one medium-sized, hyaline seta. Segment 4 with sensillar pattern ( Fig. 38 View FIGURES 31–38 ) as follows: D-2- IV peg; D-4-IV, D-7-IV pore, D-8-IV medium-sized seta, all located on flattened tubercles; L-1-IV medium-sized, thin seta, L-2-IV, L-3-IV-L-4-IV short, thin setae, all located on triangular tubercles; V-5-IV long, thin seta, V-6-IV short, stout seta, both on flattened tubercles. Segment 9 0.92 X longer than width, ventral surface with many spinules; length 0.180 –0.228 (0.210, n=4) mm, width 0.180 –0.216 (0.200, n=4) mm. Terminal process triangular, divergent, tip pointed, base wide with two setae, one medium-sized, thin seta on small rounded base, other short, stout seta on rounded tubercle; length 0.036 –0.060 (0.051, n=4) mm.

Male pupa ( Fig. 25 View FIGURES 25–30 ). Similar to male with usual sexual differences: Total length 2.16 (n=2) mm. Exuviae pale brown. Dorsal apotome ( Figs. 25–26 View FIGURES 25–30 ) with DAL 0.120 mm; DAW 0.276 mm, DAW/DAL 2.30. Anterolateral sensilla and anteromedial sensilla as in Fig. 27 View FIGURES 25–30 . Respiratory organ ( Figs. 25–28 View FIGURES 25–30 ), RO length 0.276 mm, RO width 0.024; pedicel length 0.012 mm ( Fig. 28 View FIGURES 25–30 ), P/RO 0.043. Cephalotorax ( Fig. 25 View FIGURES 25–30 ) length 0.468 mm, width 0.276 mm. Fourth abdominal segment as in Fig. 29 View FIGURES 25–30 . Segment 9 ( Fig. 30 View FIGURES 25–30 ) length 0.228 mm, width 0.240 mm; terminal process length 0.048 mm.

Distribution ( Fig. 39 View FIGURE 39 ): Brazil (Amazonas).

Types. Holotype male (with pupal exuviae), allotype female (with larval and pupal exuviae), Brazil, Amazonas, Manaus , 03°04'6.97'' S; 59°59'23.58'' W, 29-XII-2008, R.L. Ferreira-Keppler ( INPA) GoogleMaps . Paratypes 1 male, 7 females, 1 larva, 3 larval exuviae, 1 pupal exuviae, as follows: same data as holotype GoogleMaps : 2 females (one INPA, one MLP) , 1 larva ( INPA); same data except 4-IV-2011 , 2 females (with pupal exuviae) (one INPA, one MLP); same data except 10-IX-2010, 1 larval exuviae ( MLP); same data except 17-IX-2010, 1 larval exuviae ( INPA); Manaus, Campus II, 03°05'44.3'' S; 59°59'21.9'' W, 6-II-2013, Dourado- Ferreira-Keppler GoogleMaps , 1 male ( MLP); same data except 8-II-2013 GoogleMaps , 2 females (one INPA, one MLP); Iranduba , Ilha da Marchantaria , Lago Grande, 03°14'43.9'' S 59°58'54.2'' W, 21-III-2011, S. R.S. Torreias GoogleMaps , 1 female (with pupal exuviae) ( MLP) .

Material examined by SEM 3 larvae, 1 male pupa. Same data as holotype, 2 larvae ( MLP), same date except 10-IX-2010, 1 larva, 1 pupa ( MLP) GoogleMaps .

Etymology. This species is named after our friend and colleague Dr. Eloy G. Castellón Bermúdez, entomologist at the Instituto Nacional de Pesquisas da Amazônia (INPA).

Discussion. Dasyhelea eloyi belongs to the grisea group, as defined by Waugh & Wirth (1976). The group is represented in the Neotropical region by seven species: D. correntina Ronderos & Díaz , D. flavicauda Macfie , D. griseola Wirth , D. luteogrisea Wirth & Williams , D. necrophila Spinelli & Rodriguez , D. paulistana Forattini & Rabello and D. pyrsinota Macfie. Of these, D. necrophila is the most similar to the new species, differing as follows:

- Adult: the male of D. necrophila has the posterolateral arms of the aedeagus directed laterally, the apex of the gonostylus is truncate and the paramere is slightly curved.. The female differs by the frontal sclerite unilobated, with shorter triangular ventral projection, by the brownish legs with pale rings subbasally and subapically on femora, and by the subgenital plate bearing lateral projections.

- Larva: The palatum of D. necrophila bears 2 pairs of sensilla campaniformia and 2 pairs of sensilla coeloconica, the scopae are absent, the epipharynx is unarmed and the thoracic pigmentation is yellowish.

- Pupa: The pupal respiratory organ of D. necrophila has 30 apical and 4 lateral pores.

Spinelli & Rodriguez (1999), in the original description of D. necrophila , incorrectly mentioned 5 ventral posteromarginal setae (v.p.m), and Ronderos et al. (2003) also incorrectly described 5 d.p.m. and 4 v.p.m. A detailed revision of the pupa of D. necrophila during the present study reveals that the d.p.m. (currently named D- IV) and v.p.m (currently named V-IV) are represented by 3 and 2 setae, respectively.

The Nearctic species D. pseudoincisurata Waugh & Wirth is also similar to D. eloyi , but the posterior margin of male sternite 9 is straight to slightly concave, the posterolateral arms of the aedeagus each bears a small, narrow and mesally curved projection, the female frontal sclerite is elliptical, the halter is yellow with the base of the knob dark, and the apex of the subgenital plate is blunt and more slender. The description of the pupa of this species is poor and incomplete, and therefore, it is not presently possible to properly compare it with D. eloyi .

R

Departamento de Geologia, Universidad de Chile

INPA

Instituto Nacional de Pesquisas da Amazonia

MLP

Museo de La Plata

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Ceratopogonidae

Genus

Dasyhelea

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