Baeocera inusitata, Groll, 2025

Baeocera inusitata sp. nov.

urn:lsid:zoobank.org:act:FDC769FE-16E8-4DC5-BC8F-BD494B65DCE1

Figs 1A–B View Fig , 19–24 View Fig View Fig View Fig View Fig View Fig View Fig , 93D View Fig

Diagnosis

Body length: 1.09–1.31 mm; body oblong; dark brown. Antennae elongate, almost reaching metacoxae. Mesepimeron about 4.5× as wide as long. Submesocoxal lines slightly arcuate, punctate; submesocoxal area short. Basal striae entire (connected to sutural and lateral ones). Parameres of aedeagus enlarged posteriorly in lateral view. Females with distal gonocoxite rounded cone-shaped, bearing one long apical seta; gonostylus absent.

Etymology

The species epithet is a Latin word meaning ‘unusual’, referring to the distinctive morphology of the female ovipositor.

Material examined

Holotype

BRAZIL • ♂; Minas Gerais, Viçosa, EPTEA Mata do Paraíso ; 24 Mar. 2022; E. von Groll et al. leg.; “Falcon 20 / Em Ceratiomyxa fruticulosa em Pinus / HOLOTYPUS ♂ ”; CELC. ( Fig. 19D–E View Fig )

Paratypes

BRAZIL • 7 ♂♂, 6 ♀♀ (3 ♂♂ *, 2 ♂♂ **, 1 ♀ *); same collection data as for holotype; CELC • 8 ♂♂, 3 ♀♀ (1 ♂ *, 1 ♀ *); same collection data as for holotype; 26 Mar. 2022; “Falcon 26 / Em Ceratiomyxia fruticulosa em Pinus ”; CELC • 5 ♂♂, 6 ♀♀ (1 ♂ **, 1 ♀ *); same collection data as for holotype; 31 Mar. 2022; E. von Groll et al. leg.; “Falcon 19 / Em Ceratiomyxia fruticulosa no tronco caído”; CELC • 1 ♂, 5 ♀♀ (1 ♀ *); same collection data as for holotype; 14 Apr. 2022; Falcon 42; CELC • 3 ♂♂, 2 ♀♀ (2 ♂♂ *, 2 ♀♀ *); Minas Gerais, Viçosa, UFV, Mata da Biologia ; 12 Apr. 2022; E. von Groll and G.J Figueiredo leg.; “Falcon 04 / Em Ceratiomyxia fruticulosa no tronco caído”; CELC • 1 ♂; same data collection as for preceding; “Falcon 01 / Em Ceratiomyxia fruticulosa no tronco caído”; CELC .

Description

COLOURATION. Dark brown; antennomeres I–VI, tibiae, tarsi, apex of each abdominal ventrites light ochreous; coxae, femora, and clypeus dark ochreous ( Fig. 19A–C, F View Fig ). Variation: all structures paler.

HEAD ( Fig. 19F–M View Fig ). Frons finely punctate; pubescence sparse ( Fig. 19F View Fig ). Labrum slightly curved posteriorly ( Fig. 19I View Fig ). Mandibles strongly curved; tooth elongate ( Fig. 19J–K View Fig ). Last maxillary palpomere remarkably thin ( Fig. 19L View Fig ). Labial palpomere II shortened, wider than long; IV almost straight, thin; posterior portion of mentum with three concavities: one large in middle and two small laterally ( Fig. 19M View Fig ). Antennae ( Fig. 19G–H View Fig ) elongate, almost reaching metacoxae ( Fig. 20I View Fig ); antennomeres thin, antennomere VII slightly oblong; proportions (n=13): I 69/33: II 69/33: III 39/14: IV 48/14:V 59/14: VI 59/16:VII 58/22: VIII 78/26: IX 89/32:X 89/34: XI 95/35.

PROTHORAX ( Fig. 20A–E View Fig ). Shining, lacking microsculpture; punctation fine and moderately sparse. Pronotum with a distinct anterior bead ( Fig. 20A View Fig ). Prosternal process thick in lateral view ( Fig. 20C View Fig ). Profurca slightly robust and elongate ( Fig. 20E View Fig ).

MESOTHORAX ( Fig. 20F–I View Fig ). Scutellum visible in dorsal view, wider than long ( Fig. 20A View Fig ); tip rounded ( Fig. 20F View Fig ). Mesoventral lines very curved; coxal rests large; median lines open ( Fig. 20G View Fig ). Mesepimeron about 4.5 × as wide as long, and about 0.73 × the width of the mesanepisternum ( Fig. 20I View Fig ).

METATHORAX ( Fig. 20G–L View Fig ). Metaventrite smooth, shining, and with few pubescence laterally ( Fig. 20I View Fig ). Submesocoxal lines slightly arcuate coxae, punctate; submesocoxal area short, length: 0.02–0.04 mm ( Figs 20G–I View Fig , 23C View Fig ). Metanepisternal suture punctate, curvature variable ( Figs 20I View Fig , 23C View Fig ). Metanotum with trapezoidal alacrista and scutoscutellar suture just slightly longer than apodeme ( Fig. 20J View Fig ). Metendosternite with stalk and arms similar in thickness ( Fig. 20K–L View Fig ).

WINGS ( Figs 19A View Fig , 21A–C View Fig , 23A View Fig ). Elytra with coarse and moderately sparse punctures. Basal striae connected to sutural and lateral ones; all impunctate.

LEGS. Elongate, not microsculptured ( Figs 21D–I View Fig , 23D–I View Fig ).

ABDOMEN. Submetacoxal lines distinctly coarse punctate ( Figs 20I View Fig , 23C View Fig ). Ventral surface shining; pubescence sparse, denser posteriorly, punctures moderately coarse ( Figs 19B–C View Fig , 23B View Fig ). Ventrite I with ( Fig. 19B View Fig ) or without ( Fig. 23B View Fig ) a lateral curved impression – unrelated to sex, collection date, or life stage (including teneral specimens). Pro- and pygidium with hardly visible micropuncture; sparsely pubescent ( Fig. 21J View Fig ).

Males

Pro- and metatibiae slightly curved ( Fig. 21D–E View Fig ). Pro- and mesotarsomeres I–III slightly widened, protarsomeres bearing few and elongate tenent setae ( Fig. 21G–H View Fig ). Both sternite and tergite VIII with triangular-rounded posterior projection ( Fig. 21K–L View Fig ). Tergite IX with ventral struts curved ( Fig. 21M View Fig ). Sternite IX oblong ( Fig. 21M View Fig ). Tergite X wide and triangular.

AEDEAGUS ( Fig. 22A–H View Fig ). Median lobe slightly curved in lateral view ( Fig. 22C, H View Fig ), basal bulb poorly sclerotized, apical lobe moderately sclerotized, almost same length as basal bulb. Parameres more ( Fig. 22C View Fig ) or less ( Fig. 22H View Fig ) wide posteriorly in lateral view. Sclerite of internal sac with two elongate and twisted sclerotized plates ( Fig. 22E–G View Fig ).

MEASUREMENTS (n=14, including holotype, unless otherwise specified; in mm). TL (n= 26) 1.11–1.27 (1.18± 0.04), SY 0.13–0.17 (0.14 ± 0.01), HW 0.31–0.36 (0.33 ± 0.01), IS (n =13) 0.14–0.18 (0.16 ±0.01), WA 0.08–0.12 (0.09 ± 0.01), PL 0.40–0.48 (0.44 ± 0.02), PA 0.35–0.42 (0.38 ± 0.02), PB 0.62–0.76 (0.68 ± 0.03), SL 0.01–0.02 (0.02 ± 0), SW 0.04–0.05 (0.05± 0), EI 0.71–0.83 (0.77 ± 0.04), EL 0.80–0.93 (0.86 ± 0.04), EW 0.33–0.43 (0.38± 0.03), EH 0.29–0.36 (0.33 ± 0.02), MsW 0.17–0.21 (0.19± 0.01), MeL 0.03–0.04 (0.03± 0), MeW 0.11–0.16 (0.14 ± 0.02), MB 0.11–0.16 (0.14 ± 0.01), MC 0.27–0.31 (0.29 ± 0.02), ML 0.03–0.04 (0.03 ± 0), VL 0.15–0.22 (0.18 ± 0.02), VL2 0.21–0.27 (0.24 ± 0.02), PrF 0.31–0.40 (0.36 ± 0.02), PrT 0.25–0.31 (0.28± 0.02), MsF 0.32–0.41 (0.37± 0.02), MsT 0.30–0.36 (0.32 ± 0.02), MtF 0.39–0.45 (0.42 ±0.02), MtT 0.35–0.44 (0.39 ±0.03).

Females ( Figs 23–24 View Fig View Fig )

Sternite VIII with a wide and rounded posterior projection ( Fig. 23J View Fig ). Tergite VIII triangular, lacking posterior projection ( Fig. 23K View Fig ). Distal gonocoxite rounded cone-shaped, bearing one long apical seta, gonostylus absent ( Figs 23L–M View Fig , 24A–D View Fig ).

MEASUREMENTS (n= 14, unless otherwise specified; in mm). TL (n= 22) 1.09–1.31 (1.22± 0.05), SY 0.13– 0.17 (0.15 ±0.01), HW 0.31–0.35 (0.33± 0.01), IS 0.15–0.20 (0.18 ±0.02), WA 0.08–0.12 (0.10 ± 0.01), PL 0.43–0.50 (0.47± 0.02), PA 0.35–0.42 (0.39 ±0.02), PB (n =12) 0.65–0.75 (0.70 ± 0.03), SL 0.02– 0.03 (0.02 ±0), SW 0.04–0.06 (0.05 ±0), EI 0.70–0.86 (0.80 ±0.05), EL 0.81–0.95 (0.89 ±0.04), EW 0.34–0.44 (0.38 ± 0.03), EH 0.29–0.39 (0.35 ± 0.03), MsW 0.17–0.22 (0.19± 0.01), MeL (n=13) 0.03–0.04 (0.03 ±0), MeW (n=13) 0.13–0.17 (0.14 ±0.01), MB 0.13–0.18 (0.15 ± 0.01), MC 0.27– 0.32 (0.3 ±0.01), ML 0.02–0.04 (0.03 ± 0), VL 0.11–0.22 (0.19 ± 0.03), VL2 0.22–0.27 (0.25± 0.02), PrF 0.34–0.41 (0.37 ± 0.02), PrT 0.26–0.32 (0.29 ±0.02), MsF 0.36–0.40 (0.39 ±0.01), MsT 0.31–0.36 (0.34 ± 0.02), MtF 0.41–0.47 (0.44 ± 0.02), MtT 0.35–0.45 (0.41 ± 0.02).

Host

Collected from Ceratiomyxa fruticulosa on a fallen Pinus sp. ( Fig. 1G View Fig ) and other two logs, also covered with C. fruticulosa ( Fig. 93D View Fig ).

Remarks

This species is similar to B. colibri sp. nov. but differs mainly by the entire basal striae, and by the more elongate antennae, with thinner antennomeres. Other differences are the very short submesocoxal area and the much thinner last maxillary palpomere. Regarding the genitalia, B. inusitata sp. nov. can be easily distinguished from B. colibri sp. nov. by the straight parameres in males and by the distinct shape of the ovipositor in females. The absence of gonostylus was also recorded to the B. lenta species group (e.g., B. caliginosa Löbl, 1984 ) ( Ogawa & Löbl 2013) but B. inusitata sp. nov. differs by the much shorter distal gonocoxite.

Distribution

Mata do Paraíso and Mata da Biologia, Universidade Federal de Viçosa, campus of Viçosa, state of Minas Gerais, Southeast Brazil ( Fig. 1A–B View Fig ).