Bruggmanniella sideroxyli Rodrigues & Maia, 2020

Rodrigues, Alene Ramos, Carvalho-Fernandes, Sheila Patrícia, Maia, Valéria Cid & Oliveira, Lázaro Araújo, 2020, Three new species of Bruggmanniella Tavares, 1909 (Diptera, Cecidomyiidae) from Brazil with a key to species, Revista Brasileira de Entomologia (e 201917) 64 (1), pp. 1-8 : 5-6

Bruggmanniella sideroxyli Rodrigues & Maia new species

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( Figs. 6 and 7 )

Diagnosis. Palpus three-segmented, flagellomeres with striated short necks, male hypoproct deeply bilobed, ovipositor rigid portion 2.2-3.0 length of 7 th sternite, antennal horns 0.21-0.26 mm long with micro serrated margin, apical plate rough and prothoracic integument rough, spatula four-toothed.

Adult. Body length: 2.10 – 2.88 mm in male (n = 2); 2.47 –2.78 mm in female (n = 3). Head ( Fig. 6a ): eye connate in vertex, facets circular closely approximated. Antenna: scape obconic, 1.4 times length of pedicel; pedicel globose; flagellomeres cylindrical with striated short necks in both sexes, first flagellomere equal in length to the second one in male (n = 2), and 1.2 – 1.4 times longer in female (n = 2). Male flagellomeres ( Fig.6b ) with slightly wavy circumfila, female flagellomeres ( Fig. 6c ) with two connected ring-like circumfila. Frontoclypeus with 17 – 22 setae (n = 3). Labrum elongated, apex triangular. Hypopharynx elongated, apex triangular, longer than labrum, apically. Labella triangular, each with three short mesal setae and few lateral setae. Palpi setose three-segmented: first segment short and ovoid; second segment cylindrical; third segment elongated and cylindrical, as long as the second.

Thorax:Wing length: male with 1.60 – 1.82 mm (n = 3); female with 2.21 – 2.27 mm (n = 3); R 5 joining C beyond wing apex. Anepimeron setose. Another pleura bare. Tarsal claws simple, curved beyond midlength, empodia almost as long as bending claws ( Fig. 6d ).

Male abdomen ( Fig.6e ): 1 st – 7 th tergites rectangular with a posterior row of setae, lateral row of setae, one pair of trichoid sensilla, and elsewhere with scattered setulae. 8 th tergite not sclerotized with one pair of trichoid sensilla. 1 st – 7 th sternites rectangular with a posterior row of setae, lateral row of setae, some mesal setae, one anterior pair of trichoid sensilla, and elsewhere covered with setulae. 8 th sternite rectangular setose and covered with setulae, with one anterior pair of trichoid sensilla. Terminalia ( Fig. 6f ): gonocoxite cylindrical with setae and microsetae, about 2.8 times length of gonostylus; gonostylus ovoid with short setae and microsetae, apical teeth triangular, slightly askew in lateral view; cerci narrow setulose with triangular lobes, slightly longer than hypoproct; hypoproct deeply bilobed, with setae and microsetulae; aedeagus narrow pointed at apex, longer than cerci.

Female abdomen ( Fig. 6g ): 1 st – 7 th tergites rectangular with a posterior row of setae, lateral row of setae, one anterior pair of trichoid sensilla, and elsewhere with scattered setulae. 8 th tergite with scattered setulae. 1 st – 6 th sternites rectangular with a posterior row of setae, lateral row of setae, some mesal setae, one anterior pair of trichoid sensilla, and elsewhere covered with setulae. 7 th sternite rectangular with apex rounded, about 2.04 – 2.12 length of preceding sternite, rectangular, more sclerotized at distal margin, with scattered setae and one anterior pair of trichoid sensilla. 8 th sternite unsclerotized. Ovipositor: base pyriform, rigid portion with 2.2 – 3.0 times length of 7 th sternite.

Pupa. Body length: 2.95 – 3.36 mm (n = 3). Cephalic region ( Fig.7a ): antennal horns, triangular with micro-serrated margin, 0.21 – 0.26 mm of length (n = 3); cephalic setae 0.07 – 0.10 mm of length (n = 3); two pairs of lower lateral papillae (one setose and the other bare); three pairs of lateral papillae (two setose and one bare); upper facial margin thickened laterally; apical plate integument rough ( Fig. 7b ). Prothoracic spiracle cylindrical, elongated and straight, 0.32 – 0.35 mm of length (n = 3) ( Figs. 7a and b ). Prothoracic integument grainy as in the Fig. 7b . 3 rd – 9 th abdominal segments with dorsal spines ( Fig. 7c ), abdominal spiracles conical on 4 th – 6 th segments, length of abdominal spiracle 5: 0.05 – 0.06 mm (n = 3). Terminal segment bilobed in males ( Fig. 7d ) and rounded in females, with numerous dorsal spines.

Larva. white, body cylindrical, rounded anteriorly and tapered to end, length: 2.00 – 2.18 mm (n = 3), integument grainy. Prothoracic spatula length: 0.26 – 0.32 mm (n = 3), width: 0.11 – 0.13 mm (n = 3); four-toothed, internal teeth slightly larger than the external ones; stalk less sclerotized; three lateral papillae at each side with long setae; sternal papillae longer and stronger ( Fig. 7e ). Terminal segment rounded, without visible papillae.

Material examined. Holotype: Male, BRAZIL, Rio de Janeiro, Mangaratiba city, Ilha da Marambaia, Armação beach , 25.vii.2010, Rodrigues, A. R. col.. Paratypes: same locality, data and collector: 7 females, and 9 pupal exuvia . Paratypes: same collector: 1 female, 5 pupae and 5 larvae, Caju beach , 25.vii.2010 . Paratypes: same collector: 2 males, Caju beach , 21.vi.2010 .

Gall. on fruits ofS.obtusifolium, ovoid,green,glabrous, multi-chambered, with a single larva inside each chamber, pupation in the gall ( Fig. 1c ). Fruit with gall similar to healthy fruit. Occurrence from June to August, and from October to November of 2010.

Etymology. The specific name is the genitive of the host plant genus.

Remarks. The new species is unique in presenting antennal flagellomeres with striated necks (adults) and prothoracic spatula with long and strong setiform sternal papillae (larva). This is the first record of galling insect associated with S. obtusifolium.

Figures

Figure 1. Galls of Bruggmanniella (Diptera, Cecidomyiidae). a) Stem gall on Miconia theaezans (Bonpl.) Cogn (Melastomataceae) induced byB. miconiaenew species,arrows pointing pupal exuviae.b) Fruit gall on Ocotea notata (Nees and Mart.) Mez (Lauraceae) induced by B.notatae new species.c) Fruit gall onSideroxylon obtusifolium (Roem.and Schult.) T. D.Penn. (Sapotaceae) induced by B. sideroxyli new species.

Figures 3. Bruggmanniella miconiae new species:a) pupa,cephalic regionand prothoracic spiracle, frontal view; b) pupa, apical plate with integument detail and prothoracic right side, dorsal view; c) pupa, abdominal segment 5 with dorsal spines, dorsolateral view;d) pupa male,terminal segment,lateral view;e) larva,spatula,lateral and sternal papillae, ventral view. Scale bars in millimeters (mm).

Figures 6. Bruggmanniella sideroxyli new species:a) female head,frontal view;b)male flagellomere 3; c) female flagellomere 4; d) male, claw and empodium of midleg; e) male, abdominal segments 6 – 8, lateral view; f) male, terminalia, dorsal view; g) female,abdominal segments 5 – 8,dorsolateral view.Scale bars inmillimeters (mm).

Figures 7. Bruggmanniella sideroxyli new species: a) pupa, cephalic region and prothoracic spiracle, frontal view; b) pupa, apical plate and prothoracic right side, dorsal view; c) pupa, abdominal segment 5 with dorsal spines, dorsal view; d) pupa, terminal segment, dorsal view; e) larva, spatula, sternal and lateral papillae, ventral view.Scale bars in millimeters (mm).