Ulivellia tenoris Kovac & Kameneva & Korneyev & Araújo & Savaris & Smit & Schneider & Schreiber & Korneyev 2024, sp. nov.
Creators: name: Kovac, Damir
name: Kameneva, Elena P.
name: Korneyev, Severyn V.
name: Araújo, Alexandre Santos
name: Savaris, Marcoandre
name: Smit, John T.
name: Schneider, Alexander
name: Schreiber, Robert
name: Korneyev, Valery A.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Ulidiidae
Ulivellia
Ulivellia tenoris

description: Ulivellia tenoris Kovac & Kameneva sp. nov.
urn:lsid:zoobank.org:act: 99D46D24-8AA7-4683-AFF4-0F7D4A2A55E0
Figs 4 F, 7 D, 8, 9 C, H, 57, 59–60.
Material examined. Type. Holotype ♀: “ Bolivia: Santa Cruz, near Buena Vista (El Cairo) [17.4734S, 63.6922W], larva in bamboo internodium (Guadua chacoensis, last year), emerged on 05.ii.2011, Bol Z15/4/11, leg. D. Kovac ” (SMF).
Larvae. Bolivia: Buena Vista, 6.ii.2011, BolZ32/11, 5 larvae (D. Kovac leg.) (SMF).
Diagnosis. Ulivellia tenoris differs from other species of the genus in the combination of non-lobed costal cell, the presence of prescutellar acrostichal setae, a completely black halter and legs; it is most similar to U. pseudinsolita in having a wing pattern with four narrow brown crossbands, of which the discal and preapical are oblique and clearly diverging posteriorly, and differs from it in having a narrower wing and a wider hyaline interspace between discal and preapical crossbands, in the partly yellow colouration of legs and halter, and in the absence of the acrostichal setae (see the key). Both species have the wing pattern similar to that of Euxesta insolita, clearly differing by the at least partly hyaline or yellow wing base (in E. insolita entirely black); as well as by the almost twice larger size (in E. insolita wing length =3.0– 3.5 mm).
Description. Female. Head (Figs 57 C–D) ratio (length: height: width) = 1: 1.3: 1.7, frons, vertex, parafacial, and gena brownish yellowish brown, face and occiput mostly brown. Frons subshining yellowish-brown, narrowed posteriorly (Fig. 57 C), 1.17× as long (from the lunule to inner vertical seta) as wide at lunule and 1.4× longer than wide at vertex or 0.9 × as long (from the lunule to anterior ocellus) as wide at lunule and as long as wide at vertex; with metallic shining, brown ocellar triangle and vertical plates; orbits, vertex, gena and occiput silver-white microtrichose; parafacial narrow, 0.2× broader than postpedicel, sparsely white microtrichose. Frontal plates with 8–10 proclinate parafrontal setulae and 8–9 frontal setae, forming 1–3 irregular rows; frontal vitta with 6–7 interfrontal setae at each side, anteriormost submedial setulae crossing, longer than other setulae and half as long as outer vertical seta; 1 reclinate anterior orbital setula (as long as longest frontal setae) and 1 very long posterior orbital seta as long as ocellar seta, 0.56× longer than inner vertical seta and 1.5× longer than outer vertical seta; postocellar seta long, 0.56× longer than inner vertical seta; outer vertical seta short, 0.4× longer than inner vertical seta and twice as long as postocular setae forming one row, allied by 8–10 dorsal and 10–12 ventral occipital setae. Lunule narrow, indistinct, orange. Eye 1.5× higher than long. Face (above suture) 0.65× higher than wide at transverse fold, yellowish brown, white microtrichose; epistome dark brown, sparsely white microtrichose, with metallic cyan sheen, strongly produced anteriorly and separated from upper part of face by deep fold. Clypeus shiny brown, sparsely white microtrichose, 0.5× higher than epistome. Gena brownish yellow, with moderately long genal seta and 4–5 peristomal setae anterior of it, 0.4–0.5× longer than genal seta. Occiput brown, medially yellow, with cyan metallic sheen, greyish microtrichose; ventral part of occiput (postgena) with 8–10 setae as long as genal seta.
Antenna brownish yellow; scape and pedicel with black setulae; postpedicel brown, whitish microtrichose, twice as long as wide, apically rounded; arista brown, almost bare. Mouthparts brown, prementum dark brown, with steel sheen. Palp brown, moderately wide crescent, apically rounded, with 7–8 long black setulae, of which 3–4 apico-medial ones longer than other setulae.
Thorax (Fig. 57 E) brown to black, with greenish sheen and sparse white microtrichia not obscuring underlying cuticle. Mesonotal scutum 1.2× longer than wide; with brown microtrichia posterolateral to transverse suture, black setulose, with 10–12 rows of setulae between rows of dorsocentral setulae; acrostichal prescutellar setae absent; prescutellar area setulose to posterior dorsocentral seta. Scutellum dorsally very slightly convex, brown, subshining, sparsely microtrichose, without setulae, laterally yellow, with greenish sheen. Subscutellum and mediotergite black, grey microtrichose. Other setae as described for the genus. All the setae and setulae black.
Wing (Fig. 4 F) 6.4 mm (♀) long, 3.2× longer than wide; basicostal cell yellowish; costal cell 7× longer than wide, brown in basal half, with costa almost straight, forming neither lobe nor cleft; pterostigma entirely brown, narrow triangular, 6× longer than wide, vein R 1 with 13–15 setulae dorsally after Sc apex, ending at level of crossvein dm-m; vein R 2+3 weakly arcuate, subparallel to costa, turning towards it before very apex. Crossvein r-m distal to middle of cell dm. Cell r 4+5 7× longer than wide, widened distal to crossvein dm-m, narrowed apically. Cell m 1 narrowly triangular; the ultimate section of M 1 4.8× longer than crossvein dm-m and 1.9× longer than penultimate section, conspicuously deepening posteriorly. Vein CuA Z-shaped, forming moderately long posteroapical lobe of cell cua along vein CuP, 1.2× longer than its anterior shoulder. Wing pattern with subbasal crossband from basal half of costal cell through cell cua into alula, wide oblique brown discal crossband from pterostigma to base of cell m 4 except its very base and apex; narrow and oblique preapical crossband from cell r 1 through crossvein dm-m merging with apical crossband in cell r 1 to apex of cell m1; hyaline space between discal and preapical crossband 2.7–2.8 times as wide as discal crossband in cell dm (Fig 4 F, 57 A). Cell cup and anal lobe grey in apical half, narrower than cell cua. Alula 3× longer than wide, grey in apical 0.5–0.6. Calypters white, with white cilia. Halter brownish yellow.
Legs (Fig. 57 A) with yellow or brownish yellow coxae and trochanters, femora and tibiae entirely black, except knees narrowly brown, with bluish sheen; tarsi entirely brownish yellow, black setose and setulose. Fore femur with 2 rows of posterodorsal and posterior setae slightly shorter than femur width, and 4–5 strong posteroventral setae in apical half. Mid femur anteriorly with row of short suberect setulae; mid tibia ventrally with one subequal spur-like seta 2–2.1× longer than tibia width.
Abdomen moderately elongate (Fig. 57 F), black, sparsely whitish microtrichose, with greenish metallic sheen; syntergite 1+2 sometimes brown. Tergites 4–5 subequally long; tergite 6 of ♀ short, completely hidden beneath tergite 5.
Larva. General structure: As in A. duo, body length 7.6–12.7 mm (median: 9.45 mm; n = 10), width 2.5–2.9 mm (median: 2.65 mm; n = 10).
Pseudocephalon. As in A.duo (Figs 59 A–F). Second antennal segment retracted, not visible, 25 and 28 oral ridges adjacent to oral cavity, identical on both sides of the body (n = 2 larvae).
Cephalopharyngeal skeleton (Fig. 7 D). As in Aspistomella duo. Total length 1.6–1.7 mm (n = 3). Indentation between tips of apical tooth and ventral apodeme 0.59–0.68× as deep as wide; one specimen with one small, one specimen with very small, and one specimen without preapical tooth. Hypopharyngeal sclerite 3.6–5.2× longer than high. Parastomal bars curved.
Thoracic segments I–III. As in Aspistomella duo. Anterior spiracles on thoracic segment I consist of 18–24 tubules (median = 21, n = 20 tubule rows, 10 larvae). The number of tubules on the left and right side of the same larva often differs by up to three tubules. The first thoracic segment bears 14 cuticular sensilla on each body side, the second and third thoracic segments bear 13 cuticular sensilla, type and location of sensilla are shown in Fig. 8).
Abdominal segments I–VII. Abdominal segments I–VII bear 13 cuticular sensilla on each side of the body and a pair of rudimentary lateral spiracles (Fig. 8). Ventrally, the creeping welts on abdominal segments I-VII arranged as follows: CW1 (Fig. 60 A): Five more or less continuous rows of spinules, third row short, spinules in second row somewhat larger, all spinules acute and directed posteriorly. CW2 (Fig. 60 B): Anteriorly about 5 discontinuous rows of small spinules, row portions short and sometimes curved, forming a reticulate structure (rows b), central row discontinuous, more pronounced laterally (row c), followed by rows of large spinules (row d) arranged as follows five short horizontal central row portions containing groups of five to seven large spinules, laterally flanked by five inclined curved rows angled to the midline, more or less connected to rows of small spinules, last row continuous, consisting of small acute spinules (row e). All spinules directed posteriorly. CW3 – CW7 (Fig. 60 C): similar to CW2, but two additional discontinuous rows anterior to the mesh-like structure, one of them with large and one with small spinules, all directed anteriorly (rows a); central row with groups of large spinules similar to CW2, but the five central horizontal row portions as well as 1–2 adjacent inclined row portions have a double row of spinules, the anterior ones directed anteriorly and the posterior ones directed posteriorly.
Caudal segment (Figs 60 D–G). Caudal segment bears 13 cuticular sensilla on each side of body (Figs 8 B, C). Caudal creeping welt CW8 similar in structure to CW3 – CW7, but large spinules simpler, sometimes forming only one row; last row e arranged along anterior margin of perianal pad with anteriorly directed spinules (Fig. 60 D).
Posterior spiracles (Figs 9 C, 60 F, G) oval, length 0.59–0.69 mm (median = 0.6, n = 26), width 0.46–0.53 mm, (median = 0.50, n = 26), shortest distance between spiracles 0.09–0.15 mm (n = 15). There is a tendency for usually one of the two anterior spiracles to show a slight upward curvature. Spiracular slits with about 8–11 turns, central part of spiracular slits 1 and 3 rather flat with a small turn, spiracular slit 2 with large central loop, yellow meandering line of approximately constant width, central part between spiracular slits usually brownish, but in some specimens also black. Spiracular hairs Hair group 1: 13–16 hair trunks, Hair group 2: 1 hair trunk, Hair group 3: 9–10 hair trunks and Hair group 4: 14–16 hair trunks (n = 4 spiracles). Anal complex and anal slit as in A. duo (Figs 60 D, E).
Puparium (Fig. 9 H). Length 8.7 mm; maximum width at the 7th abdominal segment, 2.7 mm (n = 1); dark brown, anterior spiracles, posterior spiracles and creeping welts as in third instar larva.
Etymology. The species name is a Latin adjective meaning “thin” or “narrow”, referring to its wing shape.
Biology. Larvae inhabit water-filled bamboo internode cavities of Guadua angustifolia, biology as in Aspistomella duo.
description: Published as part of Kovac, Damir, Kameneva, Elena P., Korneyev, Severyn V., Araújo, Alexandre Santos, Savaris, Marcoandre, Smit, John T., Schneider, Alexander, Schreiber, Robert & Korneyev, Valery A., 2024, Revision of the Aspistomella group of genera (Diptera: Ulidiidae: Pterocallinae: Lipsanini), pp. 1-117 in Zootaxa 5530 (1) on pages 102-107, DOI: 10.11646/zootaxa.5530.1.1, http://zenodo.org/record/14023149