Centroptella ingridae sp. nov. Figures 33-39, 83-89, 90-93, 94-109, 110-115, 116-122, 123-128, 129-132, 133-137, 138-143, 144-148, 149

Chopralla sp.: Waltz and McCafferty 1987a: 183 (larva in list of material examined)

Centroptella liebenauae: Soldán et al. 1987: 342 (partim: larva, non imago)

Bungona (Chopralla) liebenauae: Salles et al. 2016: 104, fig. 6D (larva), Appendix S3 (partim: larval characters 0-19 and 31-121); Sroka et al. 2019: fig. 6B (larva); Shi and Tong 2019: 582, figs 60-67 (larva)

Material examined.

Holotype: L-S-I♂ {specimen [XV](1)2015}, THAILAND, Mae-Hong-Son Province, Pai, Mhor-Phaeng Falls, 11.II.2015, coll. N. Kluge & L. Sheyko (ZIN). Paratypes: the same locality and collectors, 9-11.II.2015: 1 L-S♂, 2 L-S-I♀, 2 L/S♂, 6 larvae (ZIN); Pai, 19-25.XI.2010, coll. K. Tomkovich: 1 I♂ (ZIN). VIETNAM, Vinn Phu Prov., Suoi Bac Stream, Tam-Dao, 10-16.10.1984 T. Soldán: 47 larvae (paratypes of Centroptella liebenauae, including the specimen wrongly labeled as “holotype”, see above) (deposited in Institute of Entomology, BC CAS, České Budějovice).

Etymology.

This species is named in honour of Ingrid Müller-Liebenau .

Descriptions.

Larva. Cuticular coloration. Frontal side of head colourless (Fig. 86). Pronotum and mesonotum with contrasting brown, ochre and/or colourless areas, forming characteristic pattern (Figs 83-85). Thoracic pleura and metanotum partly brown, partly colourless; sterna colourless (Fig. 89). Each leg with coxa and trochanter colourless; femur either entirely colourless, or with diffuse brown macula in distal part on posterior and/or anterior surfaces; tibia and tarsus with more or less expressed diffuse brown coloration, mainly on outer side; claws brownish (Fig. 89). Abdominal terga with contrasting brown, ochre and/or colourless, areas forming characteristic pattern; most terga with large, paired, transverse blanks, which occupy medioposterior sigilla and stretch laterally from them (Figs 83-85). Caudalii colourless at base, diffusely darkened at middle (Fig. 85).

Shape and setation. Frontal suture short, nearly semicircular (as in Fig. 55). Labrum equally wide at base and middle, with pair of submedian, long setae, 2-3 pairs of sublateral, long setae and pair of long setae between submedian and sublateral ones (Fig. 116). Prostheca of left mandible with 3 blunt processes and 2-4 pointed processes (Fig. 144). Prostheca of right mandible directed medially-distally, with short, apical denticles and without long branch; median margin of right mandible proximad of prostheca either without processes, or with small seta-like processes (Fig. 145). Maxillary canines and distal dentiseta stout; distal dentiseta widened, with apex somewhat hooked toward canines (as in Fig. 42). Maxillary palp nearly as long as lacinia, 2-segmented. Labium with glossae and paraglossae subequal, both narrowed apically (Fig. 124). Glossa ventrally with irregularly arranged setae in proximal part and about 10 setae forming ventro-median row. Paraglossa with latero-apical setae forming one regular row and few setae just dorsad of it; with about 8 setae in ventro-median row; with 4 setae in dorso-median row. Distal segment of labial palp rounded apically (Fig. 123).

Pronotum with pair of protuberances near posterior margin (Figs 87, 88, 111; the same character listed by Shi and Tong 2019: 583, figs 62, 63 under species name C. liebenauae). Metanotum with vestiges of hind protoptera (as in Fig. 54). Forelegs longest, hind legs shortest; on all legs, tarsus (measured on outer side) longer than tibia; in holotype length of femur / tibia / tarsus / claw of foreleg (mm) 0.88: 0.48: 0.57: 0.16; on middle leg 0.83: 0.42: 0.48: 0.16; on hind leg 0.80: 0.39: 0.43: 0.16. Femur parallel-sided; outer margin straight or slightly concave, apically either rounded (Figs 90-92), or with blunt-angled projection bearing two subapical setae; inner margin slightly convex. Outer side of femur with regular or irregular row of 9-11 long, blunt setae and 2 subapical setae of same form (Figs 90-92). Inner-dorsal side of forefemur with few stout setae, length of these setae being half that of setae on dorsal side. Foreleg without patella-tibial suture, middle and hind legs with patella-tibial suture greatly shifted to apex of tibia. Posterior arm of U-shaped row of long setae on fore- and middle leg situated across tibia (Figs 90-91); on hind leg longitudinal (Fig. 92). Inner margin of tibia and tarsus with irregular, small, stout, pointed setae. Outer-apical seta of tibia blunt and elongate (Figs 90-92). Dorsal side of each tarsus with long, fine setae situated irregularly and partly forming two longitudinal rows. Claw either with two rows of denticles (Fig. 127) or with their vestiges (Fig. 126).

Scales on abdominal terga and sterna numerous, elongate, varying in size and shape, bordered by brown (Figs 94 - 122). Posterior margin of abdominal tergum I smooth, without denticles (Fig. 94); posterior margins of terga II-VI with short semicircular and triangular denticles (Figs 95-99); terga VII-IX with longer triangular denticles (Figs 100-102); on tergum IX middle part of hind margin behind pair of submedian setae lack denticles and projected posteriorly (Fig. 102). Posterior margin of tergum X without denticles on median part, laterally with paired groups of several denticles, decreasing in length in lateral direction (Fig. 93). Posterior margins of abdominal sterna I-IV smooth (Fig. 103); posterior margins of sterna V-VIII with regular, small, pointed, triangular denticles (Figs 104-107). Posterior margin of sternum IX in female convex, with row of triangular denticles diminished medially (Fig. 109), in male without denticles between protogonostyli, but with several denticles at sides (Figs 108, 148). Each sternum IV-VI with pair of regular, transverse rows of long, fine, bifurcate setae with spaced sockets (Figs 117-119); other sterna either without such setae, or with few, smaller setae irregularly situated. Paraprocts with small, anterior, median apodeme, with few large pointed denticles on posterior margin, with scales as on sterna and terga (Figs 93, 120-121). Tergalius I narrow, elongate-ellipsoid; other tergalii wider, gradually changing in shape from tergalius II to tergalius VII (Figs 33-39). Each tergalius II-VII, besides costal and anal ribs, with straight and narrow middle rib, located on dorsal surface on background of main trachea (Fig. 125). Costal margin with poorly expressed serration; anal margin without serration; outer margin free of ribs, slightly notched, with small seta in each notch. In middle part of cercus, lateral side with 2 long, pointed denticles on every 4th segment (Figs 129-130). Each cercus, besides regular row of primary swimming setae on inner side (Fig. 132), with smaller and thinner secondary swimming setae on outer margin; on distal half of cercus, secondary swimming setae with wide, transverse, oval bases, forming regular row (Figs 129-131); on proximal half of cercus, secondary swimming setae with small, round bases and situated irregularly (Figs 129-130).

Male genitalia. In last larval instar, developing subimaginal gonostyli folded under larval cuticle in peculiar pose, with 3rd segments bent medially-proximally (Fig. 148).

Subimago. Cuticle light brown with darker brown sutures of thorax; hypodermal coloration as in imago. On all legs of male and female all tarsal segments entirely covered by pointed microlepides (Fig. 137).

Imago, male. Head brown. Turbinate eyes relatively low and wide, with yellow stem and orange-red facetted surface (Fig. 135). Thorax dark brown, with ochre pleural membranes (Fig. 135). Wing (Fig. 149) with membrane colourless, veins pale ochre or colourless, extreme base of costal and subcostal veins proximad of costal brace brown. Femora of all legs ochre, apically diffusely tinged with reddish; foretibia light ochre, apically darkened with light brownish; middle and hind tibiae ochre, with diffuse longitudinal stripe; tarsi of all legs pale ochre; claws brown (Fig. 136). In holotype, length of femur, tibia and tarsal segments (mm) on foreleg 1.05: 1.13: 0.05: 0.55: 0.35: 0.19: 0.15, on middle leg 0.78: 0.62: 0.25: 0.09: 0.05: 014, on hind leg 0.74: 0.57: 0.21: 0.07: 0.04: 0.14. Tarsus of middle and hind leg with 1 apical spine on initial 3rd tarsomere (next after 1st+2nd tarsomere) (as in Fig. 137). Abdominal tergum I colourless; terga II-VI colourless with narrow, contrasting, reddish stripe bordering posterior margin; terga VII-X red with ochre, with darker stripe bordering posterior margin; abdominal sterna colourless (Fig. 139). Genitalia (Figs 140-143, 146). Sterno-styligeral muscle entirely absent. Posterior margin of 9th abdominal sternum between unistyligers with narrow, trapezoid, membranous, colourless process (Figs 141, 146). Gonostylus with 1st segment narrowed apically; 2nd segment thickened toward apex; 3rd segment elongate, narrow and thickened toward apex (Figs 142, 146). Penial bridge medially sharply concave (Fig. 146). Gonovectes apically with sclerotized widenings of peculiar halberd-like shape (Figs 141, 143).

Imago, female. Head and thorax ochre with reddish markings (Figs 133-134). Leg coloration as in male. Patella-tibial suture present on middle and hind legs, absent on forelegs (as in male). Tarsus of each leg with 1 apical spine on initial 3rd tarsomere (on foreleg - on tarsomere next after 2nd tarsomere, on middle and hind leg-on tarsomere next after 1st+2nd tarsomere) (as in Fig. 137). Abdominal terga intensely coloured with ochre and reddish, partly repeating cuticular colour pattern of larva; abdominal sterna nearly colourless, sterna I-VI with pair of reddish maculae near antero-lateral corners (Fig. 138).

Egg. Oval; chorion smooth, without relief (Fig. 128).

Dimension.

Forewing length of male 4.7 mm; of female 5.0 mm.

Distribution.

Indochina: known from Thailand and Vietnam; recently reported from China (Yunnan, Guangxi, Guangdong) under the species name C. liebenauae (Shi and Tong 2019).

Comparison.

Centroptella ingridae sp. nov. belongs to the inzingae - ingridae species group; male imagines of this group differ from all other Centroptella by halberd-like gonovectes and absence of the sterno-styligeral muscle (Fig. 146). The male imago of Centroptella ingridae sp. nov. differs from other members of the inzingae - ingridae group by abdominal coloration (Figs 139). The larva of Centroptella ingridae sp. nov. differs from all other Centroptella by the presence of a pair of projections on the pronotum (Fig. 111).