Karumbe Arriaga-Varela, Tomaszewska, Szawaryn, Robertson, Seidel, Ślipiński & Fikáček, 2023, GEN. NOV.
Creators: name: Arriaga-Varela, Emmanuel
name: Tomaszewska, Wioletta
name: Szawaryn, Karol
name: Robertson, James
name: Seidel, Matthias
name: Ślipiński, Adam
name: Fikáček, Martin
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Mycetaeidae
Karumbe

description: KARUMBE ARRIAGA- VARELA, TOMASZEWSKA &
SZAWARYN GEN. NOV.
(FIGS 6–11)
Zoobank registration: urn: lsid: zoobank. org:act: 50E490DD-3714-457E-9E27-69DABA334956:
Type species: Karumbe geiseri sp. nov. by present designation.
Diagnosis: Karumbe can be distinguished from other genera in Cerasommatidiidae by the following combination of characters: dorsal surfaces of head, pronotum and elytra homogeneously covered by moderately long suberect setae (Figs 6A–F, 9E, 10C, 11B, D); lateral margins of pronotum with an internal subparallel carina demarcating a wide area, and anterior pronotal margin bordered with internally crenulate bordering line (Figs 9C, 10C, 11B); prosternal process moderately to distinctly wide, possessing long lateral carinae extending anteriorly much beyond prosternal process (Figs 7F, 9D, 10B, 11C); trochanters flattened and expanded posteriorly to cover the tibio-tarsal joint (Figs 7I, K, 9F, 10E, F, 11F); abdominal ventrite 1 with complete laterally, semicircular postcoxal lines (Figs 7M, 11F); aedeagus with tegmen fused at base with penis (Fig. 8B, E). The crenulate bordering line of the anterior margin of the pronotum (Figs 9C, 10C, 11B) (simple in Cerasommatidia, Yamuy and MahaƲelo), distinctly and comparatively widely bordered pronotal base and the homogeneous moderately long suberect setae on dorsal surface are peculiar to this genus (tiny inconspicuous setae are present in Cerasommatidia and MahaƲelo, while Yamuy has two kinds of vestiture: tiny decumbent hairs and sparse, long erect setae).
Description: Length 0.90–1.45 mm. Body short oval and moderately convex, 1.25–1.30 times as long as wide, around 2.0 times as long as high. Coloration light to dark brown, usually with paler legs, antennae and palpi (Fig. 6A–F).
Head with dorsal surface homogeneously covered with moderately long setae (Fig. 9A). Clypeus large, rectangular (Fig. 9A). Frontoclypeal suture distinct, straight. Ventral antennal grooves short, not extending to posterior eye level (Fig. 9A). Antenna approximately 0.35–0.40 of body length; antennal club (Figs 7A, 11A) one quarter of total antennal length; antennomeres 1–5 longer than wide, with antennomere 5 longer than neighbouring antennomeres 4 and 6; antennomeres 6–9 variable. Eyes comparatively large, moderately prominent (Figs 7A, 9A). Galea large, densely setose at apex (Fig. 7C). Lacinia weakly narrower than galea with dense setae at apex and inner margin. Labium with mentum widest near midlength or basal third; terminal palpomere short and rounded to elongate and acuminate, 1.2–2.2 times as long as wide at base (Figs 7D, 9B, 10A).
Prothorax. Pronotum 2.1–2.2 times as wide as long, widest at base and strongly convergent anteriorly, 1.7– 1.9 times wider at widest part than on front angles (Figs 9C, 10C, 11B). Anterior margin bordered with densely crenulate bordering line; base of pronotum sinuate with margin comparatively widely bordered with less distinctly crenulate, well-developed bordering line. Pronotal sides scarcely rounded, area between lateral edge and carina weakly to distinctly concave, wide and continuously weakly narrowing posteriorly; hind angles with small, oblique indentation to receive humeral corner of elytron. Pronotal disc moderately convex, with sparse punctures provided with moderately long, thick setae. Prosternum with anterior margin scarcely arcuate posteriorly (Figs 7F, 9D, 10B, 11C); prosternal process comparatively wide, at apex about 0.7–0.9 of width of procoxal cavity, with raised lateral carinae extending anteriorly well beyond level of anterior margin of procoxal cavities; with area between carinae weakly concave; prosternal process extending posteriorly to hind level of procoxae. Hypomeron with deep and long, weakly sinuate antennal grooves (Figs 7F, 9D, 10B, 11C).
Pterothorax.Scutellar shield small, transverse, weakly rounded at apex (Fig. 7G). Mesoventrite with intercoxal process smooth, almost flat with anterior raised border incomplete medially (Figs 7I, 9F, 10E, 11C), 1.1–1.4 times as wide as mesocoxal diameter. Metaventrite as long as abdominal ventrites 1–3 together; with remnants of short discrimen (Fig. 7I); anterior margin bordered with carina weekly widening towards lateral corners, at intercoxal process bordering line weakly crenulate; central area with small to large and deep setiferous punctures. Anterior part of metanepisternum with small outer blunt projection (Fig. 7I). Elytra 0.65–1.35 mm long, about as long as wide, 2.7–3.1 times as long and 1.4 times as wide as pronotum, with lateral margins scarcely to not explanate (Fig. 6A, C, E). Surface with moderately dense and deep setiferous punctures (Figs 9E, 11D), deeper and larger than those on pronotum, bearing moderately long suberect setae; with additional intermixed shallow foveolate punctures. Epipleura moderately wide, narrowing to apex, complete at apex, with internal bordering line narrow, present from the level of mid coxae to apex. Hindwings well developed, without anal lobe, with single reduced anal vein, and median fleck present, undivided (Fig. 7H).
Legs. Trochanters roundly or angulately produced posteriorly (Figs 9D, F, 10E, F, 11F). Meso- and metatrochanters with posterior margin as a laminar expansion that covers tibio-tarsal joint when retracted. Femora flattened (mid and hind femora more distinctly than fore femora) with grooves for tibiae present throughout whole length. Claws with distinct quadrate tooth at base (Fig. 7L).
Abdomen with ventrite 1 anteriorly with marginal carina forming distinct, rounded and complete laterally postcoxal lines, extending posteriorly to nearly midlength of ventrite 1 (Figs 7M, 11F).
Male genitalia (Fig. 8B, E). Aedeagus with penis short and stout, sclerotized, curved apically, asymmetric, with ramificate apex (Fig. 8B, E). Tegmen fused to penis, submembranous, throneshaped, short or basally elongate; tegminal strut short, reduced.
Female genitalia. Spermatheca moderately large, elongate-reniform, submembranous; sperm duct short; accessory gland small membranous, of irregular shape (Fig. 8C, F, G).
Etymology: Karumbe is the Guaraní word for ‘turtle’. Gender feminine.
Species included: Karumbe brethesi, K. geiseri and K. pakaluki.
Distribution: Brazil, Grenada, Venezuela (Fig. 20A, B).
description: Published as part of Arriaga-Varela, Emmanuel, Tomaszewska, Wioletta, Szawaryn, Karol, Robertson, James, Seidel, Matthias, Ślipiński, Adam & Fikáček, Martin, 2023, The resurrection of Cerasommatidiidae, an enigmatic group of coccinelloid beetles (Coleoptera: Coccinelloidea) based on molecular and morphological evidence, pp. 1078-1115 in Zoological Journal of the Linnean Society 197 (4) on pages 1092-1099, DOI: 10.1093/zoolinnean/zlac082, http://zenodo.org/record/7814127