Description of the female of Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer) (Diptera: Psychodidae, Phlebotominae)

Descrição da fêmea de Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer) (Diptera: Psychodidae, Phlebotominae)

Abstracts

The female of Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer) is described for the first time on the basis of specimens captured on the Nhumirim Farm, in the Pantanal region of the Mato Grosso do Sul State, Brazil. The female of this species, differently from others of the Aldamyia Galati, 1995, presents a highly transparent common sperm duct and basal part of the individual sperm ducts, which are thus difficult to observe. An identification key for the females of this subgenus is presented.

Taxonomy; Dipterous; Psychodidae; Mato Grosso do Sul; Brazil


Descreve-se, pela primeira vez, a fêmea de Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer) a partir de espécimes capturados na Fazenda Nhumirim, Pantanal Sul-Matogrossense. Essa fêmea, diferente das demais do subgênero Aldamyia Galati, 1995, apresenta o duto comum e base dos dutos individuais das espermatecas muito transparentes e de difícil observação. Chave de identificação para as fêmeas desse subgênero é apresentada.

Taxonomia; díptero; Psychodidae; Mato Grosso do Sul; Brasil


PUBLIC HEALTH

Description of the female of Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer) (Diptera: Psychodidae, Phlebotominae)

Descrição da fêmea de Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer) (Diptera: Psychodidae, Phlebotominae)

Lourdislene C. Braga-Miranda; Eunice A.B. Galati

Depto. Epidemiologia, Faculdade de Saúde Pública, USP, Av. Dr. Arnaldo 715, 01246-904, São Paulo, SP egalati@usp.br

ABSTRACT

The female of Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer) is described for the first time on the basis of specimens captured on the Nhumirim Farm, in the Pantanal region of the Mato Grosso do Sul State, Brazil. The female of this species, differently from others of the Aldamyia Galati, 1995, presents a highly transparent common sperm duct and basal part of the individual sperm ducts, which are thus difficult to observe. An identification key for the females of this subgenus is presented.

Key words: Taxonomy, Dipterous, Psychodidae, Mato Grosso do Sul, Brazil

RESUMO

Descreve-se, pela primeira vez, a fêmea de Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer) a partir de espécimes capturados na Fazenda Nhumirim, Pantanal Sul-Matogrossense. Essa fêmea, diferente das demais do subgênero Aldamyia Galati, 1995, apresenta o duto comum e base dos dutos individuais das espermatecas muito transparentes e de difícil observação. Chave de identificação para as fêmeas desse subgênero é apresentada.

Palavras-chave: Taxonomia, díptero, Psychodidae, Mato Grosso do Sul, Brasil

Several specimens of the undescribed female of a species belonging to the subgenus Evandromyia (Aldamyia) Galati, 1995 were captured during a study of the phlebotomine fauna undertaken from April 2001 to July 2003 on the Nhumirim farm. The area, of 4,390.6 ha (18º59' S and 56º39' W, 98 m a.s.l.), was situated in the subregion of Nhecolândia, in Corumbá county, 160 km from this latter town, in the Pantanal region of the Mato Grosso do Sul State, Brazil. The identification of the species was only possible at the end of the period of capture, by association with a single male of E. (A.) aldafalcaoae (Santos, Andrade-Filho & Honer, 2001) captured in April 2003, having Vila Trindade, Aquidauana county, in the same region, as type-locality (Santos et al. 2001).

The subgenus Aldamyia consists of twelve species and for nine of which the association between the two sexes is already accepted: E. andersoni (Le Pont & Desjeux, 1988), E. bacula (Martins, Falcão & Silva, 1965), E. carmelinoi (Ryan, Fraiha, Lainson & Shaw, 1986), E. dubitans (Sherlock, 1962), E. evandroi (Costa Lima & Antunes, 1936), E. lenti (Mangabeira, 1938), E. termitophila (Martins, Falcão & Silva, 1964), E. walkeri (Newstead, 1914) and E. williamsi (Damasceno, Causey & Arouck, 1945). For Evandromyia sp. de Baduel (Floch & Abonnenc, 1945) only the female was described and for E. sericea (Floch & Abonnenc, 1944) and E. aldafalcaoae only the males.

There is controversy as to whether Evandromyia sp. de Baduel is in fact the female of E. sericea as it is considered to be by Ryan (1986) (Le Pont & Desjeux 1988; Young & Duncan 1994) and Young & Duncan (1994) suspect that E. andersoni is co-specific with E. sericea.

The species of Evandromyia (Aldamyia) were included in the genus Lutzomyia França, 1924, Evandroi series of the Migonei group by Lewis et al. (1977) and the Walkeri group by Martins et al. (1978).

The geographical distribution of Evandromyia (Aldamyia) includes Central America, with two species: E. dubitans and E. walkeri, and South America, with all known species. Except for E. andersoni, which was reported only in Bolivia, all the other species occur in Brazil, the majority of them being present in the Amazonian region. The species E. carmelinoi, E. evandroi and E. lenti are present in the North, Central-West, Northeast, Southeast and South Brazilian regions and E. termitophila and E. walkeri, although widespread, have not been found in this latter region. In Mato Grosso do Sul state, there are reports of E. aldafalcaoae, E. lenti and E. termitophila (Galati 2003a, Aguiar & Medeiros 2003).

The objective of this work is to present the description of the female of Evandromyia (Aldamyia) aldafalcaoae.

Material and Methods

The specimens were captured with automatic light traps (Natal et al. 1991) and sent by post to the Phlebotomine Laboratory of the Faculdade de Saúde Pública (FSP) of the Universidade de São Paulo (USP) where, after clearing by the method described by Forattini (1973) they were mounted on microscope slides in NC medium (Cerqueira 1943) and identified.

The females were measured with a Zeissâ eye-piece calibrated according to a standard Zeissâ scale and drawn with an Olympusâ clear chamber. All measurements are given in micrometers. The species nomenclature follows Galati (1995, 2003a). A sample of the material was deposited in the entomological collection of the FSP/USP.

Description of female of Evandromyia (Aldamyia) aldafalcaoae (Santos, Andrade-Filho & Honer)

(Figs. 1-12)

Total body length 2310 ± 150 (n = 9). Insect predominantly pale, with mesonotum and metanotum slightly lighter brown.

Head (Fig. 1). Length 382 ± 14 (n = 9); width 318 ± 11 (n = 8). Eyes: length 165 ± 10 (n = 8); width 90 ± 7 (n = 8) (frontal view). Interocular suture separated from antennal suture. Interocular distance 140 ± 5 (n = 8). Clypeus 138 ± 9 (n = 8) long. Flagellomeres: AIII (Fig. 2) 211 ± 18 (n = 2), AIV (Fig. 3) 105 ± 4 (n = 2), AV (Fig. 4)107 ± 5 (n = 2), AXV and AXVI missing. Ascoids simple and long, those on AIV reaching beyond the apex of the segment. Papilla present on AV. Palpomere lengths: I 33 ± 1 (n = 8), II 112 ± 3 (n = 7), III 141 ± 18 (n = 2), IV 101, V 194 (the exact value is distorted because this palpomere has shrunk). Palpal formula: 1.4.2.3.5. Newstead's spines, 2-6 on the apical third of palpomere II (Fig. 5) and 10-12 sparsely distributed on the medium third of palpomere III (Fig. 6). Labroepipharynx 237 ± 13 (n = 9) long (Fig. 9). Cibarium (Fig.10) with many reduced anterior teeth situated laterally and four large posterior (horizontal) teeth; pigment patch and posterior bulge well developed; arch complete. Pharynx unarmed. Labial sutures united. Maxilla: lacinia with about four external teeth disposed in a longitudinal row and 25 internal teeth (Fig. 7). Hypopharynx (Fig. 8) with short and well delineated apicolateral teeth.

Cervix. Ventro-cervical sensillae present.

Thorax. Mesonotum 552 ± 26 (n = 9) long. Pleurae with 2-6 (n = 9) proepimeral setae; 9-15 (n = 9) upper anepisternal setae. Setae present on the anterior katepisternum margin. Suture between katepimeron and metaepisternum absent. Wing (Fig. 11): length 1804 ± 84 (n = 6) and width 526 ± 34 (n = 6). Length of vein sections: alpha 367 ± 40 (n = 6), beta 287 ± 15 (n = 6), gamma 283 ± 19 (n = 6), delta 100 ± 25 (n = 6), pi 135± 23 (n = 6), R5 1218 ± 71 (n = 6). Length of femora, tibiae: foreleg 670, 740 (n = 1), midleg 678, 948; hindleg missing. Tarsomeres I, II, III, IV and V of all legs missing.

Abdomen. Length 1377 ± 119 (n = 9). Tergite VIII without setae. Spermathecae (Fig.12) 13.9 ± 1.6 (n = 6) long x 13.6 ± 0.9 (n = 6) wide, of an apple shape having a sclerotized cover; terminal knob arises centrally from spermathecae; smooth individual sperm ducts, 50.0 ± 2.8 (n = 6) long x 7.9 ± 2.0 (n = 6) wide at basal region and 9.5 ± 1.1 (n = 6) wide at apical region, this more sclerotized than the basal region; smooth common sperm duct, 26.2 ± 3.4 (n = 6) long x 23.1 ± 3.5 (n = 6) wide at basal region and 18.3 ±.2.9 (n = 6) at apical region; the basal region of individual ducts and the common duct are very transparent, so it is difficult to observe them. Cercus 119 ± 10 (n = 9) long.

Material Examined. BRAZIL, Mato Grosso do Sul State, Corumbá, Fazenda Nhumirim: new orchard - five females 2/02/2001, 24/07/2001, 24/10/2002, 04/12/2002, 02/03/2003, old orchard - one female 17/06/2003, one female and one male 27/04/2003, domicile - one female 24/02/2003 and biological reserve - one female 05/03/2003. All specimens were deposited in the collection of the Epidemiology Department - FSP/USP.

Taxonomic Discussion. In accordance with Galati (1995, 2003b), both sexes of Evandromyia (Aldamyia) may be characterised as follows: palpomere V longer than III; and the II palpomere equivalent to or longer than the IV; presence of the papilla on the antennomere AV; presence of the ventro-cervical sensillae and of the setae on the anterior margin of katepisternum. The females present cibarium with four posterior horizontal teeth and numerous anterior teeth laterally situated; spermathecae generally vesicular or apple-shaped though in one species they are annulated. The common and individual sperm ducts are generally sclerotized.

In view of the above mentioned characteristics there is no doubt that the female here described belongs to Aldamyia and may be distinguished from the other species of this subgenus by the characteristics given in the identification key presented below.

The association between the sexes of E. aldafalcaoae was based on the agreement of genital and extra genital characteristics and because both sexes of the other species, E. lenti, of the subgenus Aldamyia captured in this locality are known. Further E. aldafalcaoae was described from males caught in the Pantanal region and one male of this species was captured on the Nhumirim farm.

With regards to E. sericea, the other species of Aldamyia described by the male, whose female has not so far been identified with certainty (Le Pont & Desjeux 1988, Young & Duncan 1994), it was not recorded for the Brazilian Central-West region (Aguiar & Medeiros 2003).

Key for Identification of Females of the Subgenus Evandromyia (Aldamyia)

1 Spermathecae annulated ................................................ E. termitophila

Spermathecae vesicular or apple-like ....................................................2

2(1) Common sperm duct and greater part of the basal region of the individual sperm ducts highly transparent, so the limits between them are difficult to discern ........................................................................ E. aldafalcaoae

Common sperm duct and individual sperm ducts sclerotized with evident limits between them .................................................................................. 3

3(2) Common sperm duct as long as the individual sperm ducts ....................... 4

Length of common sperm duct &lt ½ of the individual sperm ducts ............... 5

4(3) Individual sperm ducts of uniform width throughout; spermathecae wider than long .................................................................................. E. dubitans

Individual sperm ducts wider at their apical parts (junction with the spermathecae) than at their central part; spermathecae as long as wide .....

.......................................................................................... E. walkeri

5(3) External margin of the common sperm duct with heavy sclerotized band ..... 6

External margin of the common sperm duct without sclerotized band ..........7

6(5) Individual sperm ducts &gt 4 times longer than the common sperm duct ..........

..................................................................................... E. carmelinoi

Individual sperm ducts &lt 2.5 times longer than the common sperm duct ...................................................................................... E. lenti

7(5) Spermathecae wider than the basal region of the individual sperm ducts ............................................................................................ 8

Spermathecae as wide as or narrower than the basal region of the individual sperm ducts .................................................................................. 10

8(7) Apical part of the individual sperm ducts (junction with the spermathecae) sclerotized .......................................................................... E. williamsi

Apical part of the individual sperm ducts (junction with the spermathecae) not sclerotized ...................................................................................... 9

9(8) Common sperm duct and basal part of the individual sperm ducts striated ..10

Common sperm duct and individual sperm ducts without striation ...............11

10(9) Individual sperm ducts ca. 7 times longer than the common sperm duct; striation of the individual sperm ducts restricted to their basal third; spermathecae ca. 1.5 times wider than the distal part of the individual sperm ducts (at junction with the spermathecae) ............................ E. andersoni

Individual sperm ducts ca. 3 times longer than the common sperm duct; striation of the individual sperm ducts restricted to their basal two-thirds; spermathecae ca. 4.0 times wider than the distal part of the individual sperm ducts (at junction with the spermathecae) ........................ E. sp. de Baduel

11(10) Common sperm duct as long as 1/3 of the individual sperm ducts; diameter of the spermathecae ca. ½ of the common sperm duct's width ...... E. evandroi

Common sperm duct as long as 1/5 of the individual sperm ducts; spermathecae wider than the common sperm duct ...................... E. bacula

Literature Cited

Received 13/X/04. Accepted 04/II/05.

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  • Santos, S.O, J.D. Andrade-Filho & M.R. Honer. 2001.Lutzomyia aldafalcaoae sp.n. a new species of Phlebotominae (Diptera: Psychodidae) from Mato Grosso do Sul, Brazil. Mem. Inst. Oswaldo Cruz 96: 791-794.
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Publication Dates

  • Publication in this collection
    14 July 2005
  • Date of issue
    Apr 2005

History

  • Accepted
    04 Feb 2005
  • Received
    13 Oct 2004
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