Baeocera facilis, Groll, 2025

Baeocera facilis sp. nov.

urn:lsid:zoobank.org:act:DE609417-1EBA-4468-8315-576FC53CDBEE

Figs 1A–B, G View Fig , 14–18 View Fig View Fig View Fig View Fig View Fig

Diagnosis

Body length: 1.00– 1.18 mm; somewhat narrow in dorsal view; moderately convex in lateral view. Brown to dark brown; mouthparts, antennae, and legs ochreous. Mesepimeron width approximately 0.72 of the mesanepisternum width, and 3.60 × as wide as long. Submesocoxal lines arcuate and punctate. Metanepisternal suture straight or moderately curved; punctate. Basal striae connected to sutural and reaching approximately the outer ⅔ of the basal width. Femora with strigulate microsculpture. Aedeagus with parameres with apex slightly thinner, sclerite of internal sac asymmetrical and undefined. Distal gonocoxite and gonostylus elongate.

Etymology

The species epithet is a Latin word meaning ‘easy’, referring of the simplicity of distinguishing this species from others.

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. 14D–E View Fig )

Paratypes

BRAZIL • 2 ♂♂, 5 ♀♀ (1 ♂ **, 1 ♀ **); same data as for holotype; CELC .

Description

COLOURATION. Dark brown; mouthparts, antennae, clypeus, and anterior part of femora dark ochreous; tibiae and tarsi light ochreous ( Fig. 14A–C, H View Fig ). Variation: all structures paler ( Fig. 14F–G View Fig ).

HEAD ( Figs 14H–I View Fig , 15A–F View Fig ). Finely punctate; pubescence sparse; one fovea above each eye ( Fig. 14H–I View Fig ). Labrum slightly curved posteriorly ( Fig. 15A View Fig ). Mandibles not strongly curved ( Fig. 15B–C View Fig ). Last labial palpomere distinctly elongate, curved; mentum concave posteriorly ( Fig. 15E View Fig ). Gular pores absent; gular suture wide near ostium; gular region with strigulate microsculpture ( Fig. 15F View Fig ). Antennae elongate ( Fig. 14J–K View Fig ), antennomere VII thin and longer than VIII, XI elongate and oval; antennomere proportions (n=2): I 76/30: II 69/30: III 35/14: IV 45/13: V 58/14: VI 51/14:VII 70/19:VIII 63/21:IX 77/28: X 75/34: XI 101/40.

PROTHORAX ( Fig. 15G–K View Fig ). Punctation sparse and fine; pubescence sparse ( Figs 14A View Fig , 15G View Fig , 18A View Fig ). Hypomeron almost glabrous, with few coarse punctation ( Fig. 16B View Fig ), absent in some specimens ( Fig. 16C View Fig ). Prosternal process narrow and spinose ( Fig. 15I View Fig ). Profurca thin and elongate ( Fig. 15K View Fig ).

MESOTHORAX ( Figs 15G, L View Fig , 16A–C View Fig ). Scutellum visible in dorsal view, wider than long ( Fig. 15G View Fig ); tip rounded; scutellar lines oblong laterally ( Fig. 15L View Fig ). Mesoventral lines angulate; coxal rests large; median lines short and open ( Fig. 15M View Fig ). Mesepimeron about 3.60 × as wide as long, and about 0.72 × the width of the mesanepisternum ( Fig. 16B–C View Fig ).

METATHORAX ( Figs 15M View Fig , 16A–F View Fig ). Metaventrite smooth, shining, and with little pubescence laterally ( Fig. 16B–C View Fig ). Submesocoxal lines arcuate and punctate; submesocoxal area length: 0.03–0.04 mm ( Figs 15M View Fig , 16B–C View Fig , 18C View Fig ). Metanepisternal suture punctate, curvature variable ( Figs 16B–C View Fig , 18C View Fig ). Metanotum with large alacrista; scutoscutellar suture not trespassing apodeme ( Fig. 16D View Fig ). Stalk of metendosternite narrower than arms ( Fig. 16E–F View Fig ).

WINGS ( Figs 14A, F View Fig , 16G–I View Fig , 18A View Fig ). Elytra with coarse and sparse punctures; pubescence fine and sparse. Basal striae connected to sutural, impunctate, and reaching about basal mid-width of elytra ( Fig. 15G View Fig ). Lateral striae fine, impunctate, and slightly curved near humeral region ( Figs 14B, G View Fig , 18B View Fig ).

LEGS. Elongate; femora with distinct strigulate microsculpture ( Figs 14C, G View Fig , 16J–L View Fig , 18D–F View Fig ).

ABDOMEN. Ventral surface shining, finely punctate; pubescence moderately dense and elongate ( Figs 14B, G View Fig , 18B–C View Fig ). Pro- and pygidium with fine and sparse pubescence ( Figs 17A View Fig , 18J View Fig ). Posterior area of ventrite I, ventrites II–VI, and tergites with imbricate microsculpture ( Figs 14B, G View Fig , 18C View Fig ).

Males

Pro- and mesotarsomeres I–III slightly widened, bearing few and elongate tenent setae ( Fig. 16J–O View Fig ). Sternite VIII with a distinct elongate posterior projection ( Fig. 17B View Fig ). Tergite VIII triangular, with a smooth posterior projection ( Fig. 17C View Fig ). Tergite IX with ventral struts curved, and forming an acute angle ( Fig. 17D View Fig ). Sternite IX with elongate anterior sclerotized projection ( Fig. 17D–E View Fig ). Tergite X triangular ( Fig. 17D, F View Fig ).

AEDEAGUS ( Fig. 17G–K View Fig ). Median lobe poorly sclerotized and slightly curved in lateral view ( Fig. 17I View Fig ). Parameres more sclerotized than apical lobe; almost parallel but apex slightly thinner. Sclerite of internal sac asymmetric and undefined ( Fig. 17G–K View Fig ).

MEASUREMENTS (n =3, including holotype; in mm). TL 1.05–1.13 (1.08± 0.04),SY 0.11–0.13 (0.12 ± 0.01), HW 0.30–0.31 (0.30 ± 0.01), IS 0.13–0.14 (0.14 ± 0.01), WA 0.06–0.08 (0.07 ± 0.01), PL 0.40–0.45 (0.42 ± 0.03), PA 0.30–0.35 (0.32 ± 0.03), PB 0.59–0.60 (0.60 ± 0.01), SL 0.01–0.02 (0.02 ± 0.01), SW 0.04–0.05 (0.05 ±0.01), EI 0.64–0.70 (0.67 ±0.03), EL 0.75–0.78 (0.77 ± 0.02), EW 0.33–0.36 (0.35 ± 0.02), EH 0.26–0.35 (0.31 ± 0.05), MsW 0.18–0.20 (0.19± 0.01), MeL 0.03–0.04 (0.04 ± 0.01), MeW 0.13–0.15 (0.14± 0.01), MB 0.10–0.14 (0.13 ±0.02), MC 0.24–0.27 (0.26 ± 0.02), ML 0.03–0.04 (0.04± 0.01), VL 0.13–0.16 (0.15 ± 0.02), PrF 0.32–0.33 (0.32± 0.01), PrT 0.25–0.26 (0.26 ± 0.01), MsF 0.33–0.36 (0.34 ± 0.02), MsT 0.30–0.31 (0.31± 0.01), MtF 0.39–0.40 (0.40 ± 0.01), MtT 0.34–0.37 (0.36± 0.02).

Females ( Fig. 18 View Fig )

Ventrite and tergite VIII with a triangular posterior projection ( Fig. 18K–L View Fig ). Spermatheca elongate, filiform ( Fig. 18M View Fig ). Distal gonocoxite elongate and slightly curved; gonostylus 6× as long as wide ( Fig. 18M–N View Fig ).

MEASUREMENTS (n =5; in mm). TL 1.00–1.18 (1.10 ± 0.06), SY 0.11–0.14 (0.13 ± 0.01), HW 0.29–0.32 (0.31± 0.01), IS 0.12–0.16 (0.14 ± 0.01), WA 0.07–0.08 (0.07 ± 0.01), PL 0.38–0.45 (0.42 ± 0.03), PA 0.29–0.39 (0.33± 0.04), PB 0.55–0.67 (0.62 ± 0.04), SL 0.01–0.02 (0.02± 0), SW 0.04–0.05 (0.05± 0.01), EI 0.64–0.74 (0.71 ±0.04), EL 0.72–0.82 (0.79 ± 0.04), EW 0.30–0.41 (0.35 ± 0.05), EH 0.27–0.36 (0.30 ± 0.04), MsW 0.16–0.22 (0.18± 0.02), MeL 0.03–0.05 (0.04 ± 0.01), MeW 0.13–0.15 (0.14 ± 0.01), MB 0.11–0.14 (0.13 ±0.01), MC 0.22–0.32 (0.28± 0.04), ML 0.04, VL 0.15–0.17 (0.16± 0.01), PrF 0.31–0.35 (0.33± 0.02), PrT 0.24–0.28 (0.26 ± 0.02), MsF 0.33–0.40 (0.36± 0.03), MsT 0.30–0.33 (0.31 ± 0.02), MtF 0.38–0.45 (0.41 ±0.03), MtT 0.35–0.39 (0.37 ±0.02).

Host

Collected together from Ceratiomyxa fruticulosa on a fallen Pinus sp. tree ( Fig. 1G View Fig ).

Remarks

The ovipositor is similar to species belonging to Xotidium Löbl, 1992 ( Ogawa & Löbl 2016), e.g., X. montanum ( Löbl, 1971) . However, B. facilis sp. nov. can be separated by the larger body and by the not approximate meso- and metacoxae. Baeocera facilis can be easily distinguished from the other species of Baeocera described in this manuscript by the femora with strigulate microsculpture and by the elongate distal gonocoxite and gonostylus in females.

Distribution

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