Austrohelea Wirth & Grogan

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, Zootaxa 3879 (1), pp. 1-327 : 60-61

publication ID

https://doi.org/ 10.11646/zootaxa.3879.1.1

publication LSID

lsid:zoobank.org:pub:6423894B-97D9-4286-ABB9-D4AF072B57FD

DOI

https://doi.org/10.5281/zenodo.5589815

persistent identifier

https://treatment.plazi.org/id/027587C9-BD15-304A-FD9B-1F294C04E6A4

treatment provided by

Felipe

scientific name

Austrohelea Wirth & Grogan
status

 

Austrohelea Wirth & Grogan View in CoL

( Figs. 19O View FIGURE 19 , 24G View FIGURE 24 , 29R View FIGURE 29 , 35F View FIGURE 35 , 44D View FIGURE 44 , 49A View FIGURE 49 , 59B View FIGURE 59 , 74B View FIGURE 74 )

DIAGNOSIS: Only pupa of Ceratopogonidae with the apex of the hind leg ventral to the apex of the midleg ( Fig. 35F View FIGURE 35 ) (only the female is known; perhaps the male, without the elongate hind leg claw of the developing adult will not have this feature).

DESCRIPTION: Total length = 2.50 mm. Without larval exuviae retained on abdomen. Exuviae with flagellum appressed against lateral margin of face (as in Fig. 15D View FIGURE 15 ). Ecdysial tear around base of antenna (as in Figs. 15D View FIGURE 15 , 79E View FIGURE 79 ); along prothoracic extension. Head: Dorsal apotome ( Fig. 19O View FIGURE 19 ), without ventral line of weakness, without dorsomedial tubercle, without central dome; dorsolateral cephalic sclerite (as in Fig. 13B View FIGURE 13 ) separated from scutum by thin cuticle, separate from scutum upon emergence, each side separated medially by dorsal apotome in whole pupa; mouthparts ( Fig. 24G View FIGURE 24 ) with mandible well-developed, lacinia absent; palpus extending equal to or just posterior to posterolateral margin of labium; labium separated medially by labrum, hypopharynx; apex of antenna ( Fig. 35F View FIGURE 35 ) anterior to posterior extent of midlength portion of midleg (portion lateral to mesosternum); sensilla: dorsal apotomals ( Fig. 19O View FIGURE 19 )—1 moderately elongate seta, 1 campaniform sensillum; dorsolateral cephalic sclerite sensilla—1 seta, no campaniform sensillum; clypeal-labrals ( Fig. 24G View FIGURE 24 )—2 elongate setae; oculars ( Fig. 24G View FIGURE 24 )—2 setae, 1 campaniform sensillum. Thorax: Prothoracic extension ( Fig. 24G View FIGURE 24 ) wide, well-developed, extending from palpus to antenna; mesonotum with short tubercles, extending posteromedially, completely dividing metathorax medially ( Fig. 49A View FIGURE 49 ); respiratory organ ( Fig. 44D View FIGURE 44 ) length/width = 6.25–6.25, elongate, slender, somewhat flattened dorsoventrally, with pores closely abutting at apex of respiratory organ, arranged in single row, with additional more basal pores, outer surface smooth, with moderately elongate pedicel, base with short posteromedial apodeme, membranous base of respiratory organ short, tracheal tube straight to slightly curved along length, with spirals restricted to base, distally with plate; wing ( Fig. 35F View FIGURE 35 ) with slight angle lateral to apex of hind leg, separated medially by fore-, midlegs; halter apex and hind leg (as in Fig. 33A View FIGURE 33 ) broadly abutting; halter apex abutting anterolateral knob-like extension of tergite 2; legs ( Fig. 35F View FIGURE 35 ) with lateral margin of foreleg near midlength of wing evenly curved; hind leg visible at lateral margin of wing (as in Fig. 32L View FIGURE 32 ); with apex of foreleg slightly anterior to apex of midleg; apex of hind leg ventral to apex of midleg, apex of each hind leg nearly abutting apically and abutting apices of foreleg; sensilla: anteromedials—2 setae; anterolaterals—3 setae; dorsal setae ( Fig. 29R View FIGURE 29 )—D-1- T, D-2-T, D-4-T setae, D-3-T campaniform sensillum, D-5-T absent, D-3-T posteromedial to D-4-T; supraalar 2—campaniform sensillum; metathoracics ( Fig. 49A View FIGURE 49 )—1 seta, 2 campaniform sensilla; M-3-T near anterior margin of metathorax. Abdomen: with anterior margins of tergites 3–7, anterior margins of sternites 3–7 pigmented, segment 2 as wide or slightly wider than segment 3, segments with undivided, thin to thick setae, with bilobed or rounded, short tubercles, tergites or sternites entire, each without membranous disc; segment 9 ( Fig. 74B View FIGURE 74 ) not strongly modified, terminal processes widely separated basally, each projecting posterodorsolaterally, tapering to pointed apex; sensilla: tergite 1 ( Fig. 49A View FIGURE 49 ) with 6 setae, 2 campaniform sensilla, including 3 lateral sensilla, D-2-I, D-3-I closely approximated, D-7-I situated posteriorly near D-8-I; segment 4 ( Fig. 59B View FIGURE 59 )—D-2-IV, D-3-IV short or moderately elongate setae on separate tubercles; D-5-IV, D-8-IV short seta, D-9-IV absent; on short bilobed 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 1 seta on bilobed tubercle, well anterior of posterior lateral setae; L-2-IV, L-3-IV, L-4-IV short setae on bilobed tubercles, V-5-IV, V-6-IV, V-7-IV short setae on bilobed tubercles; segment 8 without D-3-VIII, without L- 1-VIII; segment 9 ( Fig. 74B View FIGURE 74 )—with D-5-IX, D-6-IX campaniform sensilla.

DISTRIBUTION AND HABITAT: The genus Austrohelea is known from seven species from Australia, New Zealand and Argentina ( Borkent 2014 ). The only pupa known was reared from the subantarctic Campbell Island but the specific habitat was not recorded.

TAXONOMIC DISCUSSION: The unique pupal exuviae was previously described by Sublette & Wirth (1980) and reexamined here ( Tables 2–3 View TABLE 2 View TABLE 3 ).

MATERIAL EXAMINED: A. campbellensis : 1 pupal exuviae, Tucser Cove, Campbell Island, New Zealand, 22-I-1969 (NZAC).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Ceratopogonidae

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