Karumbe geiseri, Arriaga-Varela & Tomaszewska & Szawaryn & Robertson & Seidel & Ślipiński & Fikáček, 2023

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, Zoological Journal of the Linnean Society 197 (4), pp. 1078-1115 : 1100

publication ID	https://doi.org/ 10.1093/zoolinnean/zlac082
publication LSID	lsid:zoobank.org:pub:99842C3A-879F-4552-96B7-204D79CF3EDF
DOI	https://doi.org/10.5281/zenodo.7814191
persistent identifier	https://treatment.plazi.org/id/03C2CE00-FFEF-FF8D-3EB1-0A07FB014550
treatment provided by	Plazi
scientific name	Karumbe geiseri
status	SP. NOV.

Treatment

KARUMBE GEISERI ARRIAGA- VARELA, TOMASZEWSKA & SZAWARYN SP. NOV.

( FIGS 6C, D View Figure 6 , 7F, I, L View Figure 7 , 8A–C View Figure 8 , 10A–F View Figure 10 , 20A View Figure 20 )

Zoobank registration: urn: lsid: zoobank. org:act: 57FC49EB-6890-4AF8-BB33-70F66B4D466C

Type material: Holotype, male, GRENADA: Balthasar (Windward side), Grenada, W.I., H. H. Smith ( BMNH) . Paratypes: Same data as for holotype (one male, one female and 1 ex., BMNH; 2 ex, MIZ) .

Diagnosis: Karumbe geiseri is most similar to K. pakaluki , but it can be distinguished from the later by the wider prosternal process being about 0.90 of width of procoxa ( Fig. 10B View Figure 10 ) (0.67 in K. pakaluki ); pronotum with postero-lateral indentation shorter and more rectangular ( Fig. 10C View Figure 10 ) (longer and more oblique in K. geiseri ) and by the shape of the aedeagus. From K. brethesi it can be easily distinguished by having dorsal surface of the body covered with setiferous punctures and additional foveolate depressions (in K. brethesi peculiar punctations as in Fig. 9E View Figure 9 ), the central area of the metaventrite covered with simple setiferous punctures without wide foveate impressions ( Fig. 10E View Figure 10 ), the pronotal disc only weakly concave along the internal lateral carina, and the terminal labial palpomere short and apically rounded, 1.4 times as long as wide ( Fig. 10A View Figure 10 ) (in K. brethesi : elongate and acuminate, 2.2 times as long as wide at base).

Description: Body: length 0.90–0.96 mm, 1.25 times as long as wide, 2.0 times as long as high, short oval and moderately convex, brown with yellowish legs, antennae and palpi ( Fig. 6C, D View Figure 6 ).

Antenna nearly 0.40 times as long as body; antennomeres 1–5 longer than wide; antennomeres 6–9 subquadrate. Apical labial palpomere short and rounded, 1.4 as long as wide ( Fig. 10A View Figure 10 ).

Pronotum 2.2 times as wide as long, 1.85 times wider at widest part than on front angles ( Fig. 10C View Figure 10 ). Anterior crenulate margin comparatively wide. Area between lateral edge and internal lateral carina weakly concave, wide and continuously weakly narrowing posteriorly; pronotal disc not concave along internal lateral carina. Basal pronotal bordering line shallowly and irregularly crenulate. Posterolateral indentations comparatively deep, oblique. Prosternal process broad ( Figs 7F View Figure 7 , 10B View Figure 10 ), with apex about 0.90 of width of procoxal cavity, narrowest near half-length, weakly widened apically, with lateral carina raised, almost reaching anterior quarter of prosternum, central part between carinae depressed.

Elytra 0.67–0.76 mm long, about as long a wide, 3.1 times as long and 1.4 times as wide as pronotum; lateral margins visible from above ( Fig. 6C View Figure 6 ). Elytral dorsal surface covered with simple setiferous punctures and additional foveolate depressions without setae. Mesoventral process about 1.4 times as wide as mesocoxal diameter ( Figs 7I View Figure 7 , 10E View Figure 10 ). Metaventrite with fine setiferous punctures ( Fig. 10E View Figure 10 ). Elytral lateral margins visible from above. Wings well developed.

Legs. Meso- and metatrochanters flattened, weakly roundly produced posteriorly ( Fig. 10E, F View Figure 10 ).

Abdomen. Ventrite 1 with rounded postcoxal lines. Ventrite 5 with posterior margin straight in both sexes. Male genital segment as in Fig. 8A View Figure 8 .

Male genitalia ( Fig. 8B View Figure 8 ). Aedeagus with penis short and stout, sclerotized, narrow at base, widening distally with lateral ramus extending beyond. Tegmen throneshaped, short, submembranous, basal; tegminal strut short, reduced.

Femalegenitalia ( Fig.8C View Figure 8 ). Ovipositorweaklysclerotized. Spermatheca moderately large, irregular-subcylindrical, submembranous; sperm duct short; accessory gland small membranous, of irregular-cordate shape.

Etymology: This species is dedicated to Michael Geiser, curator in the Natural History Museum, London, for kindly pointing out to us the existence of the specimens belonging to the species here described.

Distribution: Grenada ( Fig. 20A View Figure 20 ).