Baeodasymyia Clastrier & Raccurt
Creators: name: Borkent, Art
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Ceratopogonidae
Baeodasymyia

description: Baeodasymyia Clastrier & Raccurt
(Figs. 2F, 19N, 24F, 29Q, 32K, 35E, 44C, 48F, 59A, 74A)
DIAGNOSIS: Only pupa of Ceratopogonidae with the respiratory organ elongate and with three distinct sections: a cylindrical, smooth basal portion, a cylindrical middle portion with annulations for most of its distal length, and a compressed, rounded or concave apical portion (Fig. 44C); also unique with a short foreleg, with its apex well anterior of the apex of the wing (Fig. 35E); also unique in being very small, with total body length 0.91–1.19 mm (only Schizonyxhelea are similarly small, with a body length 1.19–2.16 mm; however, the unknown pupae of Nannohelea, Baeohelea and some others will certainly be equally tiny).
DESCRIPTION: Total length = 0.91–1.19 mm. Without larval exuviae retained on abdomen. Exuviae with flagellum appressed against lateral margin of face, in some specimens against wing (as in Figs. 15D, 32K). Ecdysial tear medial to base of antenna (as in Figs. 15B, 79D); along prothoracic extension. Head: Dorsal apotome (Fig. 19N), without ventral line of weakness, with dorsomedial tubercle, without central dome; dorsolateral cephalic sclerite (as in Fig. 13B) separated from scutum by thin cuticle, separate from scutum upon emergence, each side separated medially by dorsal apotome in whole pupa; mouthparts (Fig. 24F) with mandible, lacinia absent; palpus extending posterior to posterolateral margin of labium; labium entire (not divided medially); apex of antenna (Fig. 35E) anterior to posterior extent of midlength portion of midleg (portion lateral to mesosternum); sensilla: dorsal apotomals (Fig. 19N)—1 elongate seta, 1 campaniform sensillum; dorsolateral cephalic sclerite sensilla—2 setae, 1 campaniform sensillum; clypeal-labrals (Fig. 24F)—not visible; oculars (Fig. 24F)—2 elongate setae. Thorax: Prothoracic extension (Fig. 24F) wide, well-developed, extending from palpus to antenna; mesonotum with short tubercles, extending posteromedially, completely dividing metathorax medially (Fig. 48F); respiratory organ (Fig. 44C) length/width = 3.75–6.67, elongate, with three distinct sections: cylindrical basal portion smooth, cylindrical middle portion with annulations for most of distal length, compressed apical portion rounded or concave apically, apical portion somewhat flattened, with pores closely abutting or slightly separated at apex of respiratory organ, arranged in single row, with one additional, more basal pore, outer surface with annulations, without other surface modifications, with moderately elongate pedicel, base without posteromedial apodeme, membranous base of respiratory organ short, tracheal tube straight to slightly curved along length, with spirals restricted to base; wing (Fig. 35E) with slight angle lateral to apex of hind leg, separated medially by fore-, midlegs; halter apex and hind leg (Fig. 32K) broadly abutting; halter apex extending posteriorly to 1/3 length of tergite 2; legs (Fig. 35E) with lateral margin of foreleg near midlength of wing evenly curved; hind leg visible at lateral margin of wing (Fig. 32K); with apex of foreleg far anterior to apex of midleg; apex of hind leg abutting apex of midleg laterally; sensilla: anteromedials—1 seta; anterolaterals—2 setae; dorsal setae (Fig. 29Q)—D-1-T, D-2-T, D-4-T setae, D-3-T campaniform sensillum, D-5-T absent; D-1-T, D-2-T on single tubercle, D-3-T posteromedial to D-4-T; supraalar 2—campaniform sensillum; metathoracics (Fig. 48F)—1 seta, 2 campaniform sensilla; M-3-T near anterior margin of metathorax. Abdomen: without pigmentation pattern, segment 2 as wide or slightly wider than segment 3, segments with undivided, thin to thick setae, with slightly rounded to pointed, or serrate short tubercles, tergites or sternites entire, each without membranous disc; segment 9 (Fig. 74A) not strongly modified but with dorsolateral row of spines at near midlength, bordering shallow posteromedial concavity, terminal processes closely approximated basally, each projecting posterodorsolaterally, tapering to pointed apex; sensilla: tergite 1 (Fig. 48F) with 6 setae, 1 campaniform sensillum, including 3 lateral sensilla, D-2- I, D-3-I closely approximated, D-7-I situated posteriorly near D-8-I; segment 4 (Fig. 59A)—D-2-IV, D-3-IV short setae on serrate tubercles; D-5-IV barely visible short seta, D-8-IV short seta, D-9-IV absent; D-5-IV, D-4-IV, D-7- IV, D-8-IV on short, serrate tubercles, posterior dorsal sensilla in transverse row, arranged medially to laterally: D- 5-IV, D-4-IV, D-7-IV, D-8-IV; L-1-IV absent, L-2-IV, L-3-IV short setae on pointed tubercles, L-4-IV thick seta on serrate tubercle, V-5-IV, V-6-IV, V-7-IV short setae on serrate tubercles; segment 8 without D-3-VIII, without L-1- VIII; segment 9 (Fig. 74A)—with D-5-IX, D-6-IX campaniform sensilla.
DISTRIBUTION AND HABITAT: The genus Baeodasymyia is known from five species in the Neotropical Region (Borkent 2014). The immatures of two species have been reared from small springs in Costa Rica (Borkent & Craig 1999).
TAXONOMIC DISCUSSION: Borkent & Craig (1999) described the pupae of the only two species known in this stage (Tables 2–3). Pupae of Baeodasymyia are lacking thoracic sensillum D-5-T and two sensilla on abdominal segment 4: D-9-IV and L-1-IV.
MATERIAL EXAMINED: B. christopheri: 1 pupal exuviae (of paratype), Atenas, Costa Rica, 5-X-1993 (as larva, reared) (CNCI); 1 pupa (of paratype), 2 km NE Tarcoles, Costa Rica, 17-XII-1993 (as larva, reared) (CNCI). B. michaeli: 3 pupae (of paratypes), 9 pupal exuviae (of paratypes), 1 pupal exuviae, Atenas, Costa Rica, 25-X- 1993 (as larvae, reared) (CNCI, INBC); 1 pupal exuviae (in glycerin), 2 km NE of Tarcoles, Costa Rica, 17-XII- 1993 (CNCI).
description: Published as part of Borkent, Art, 2014, The Pupae of the Biting Midges of the World (Diptera: Ceratopogonidae), With a Generic Key and Analysis of the Phylogenetic Relationships Between Genera, pp. 1-327 in Zootaxa 3879 (1) on pages 59-60, DOI: 10.11646/zootaxa.3879.1.1, http://zenodo.org/record/4949051