Eurynotus barbosai Koch

Lumen, Ryan & Kamdńskd, Marcdn J., 2024, evdsdon of the darkldng beetle genus Eurynotus (Blaptdnae: Platynotdnd % and new records of ovovdvdpary dn ºenebrdonddae, Zoological Journal of the Linnean Society 201 (201), pp. 358-386 : 382

3. Eurynotus barbosai Koch

( Figs 3D , 7A , 8J )

Eurynotus ( Eurynotus) barbosai Koch 1954a: 284 .– Koch 1956: 27; Kamiński 2016: 236.

Diagnosis: Eurynotus barbosai is most similar to E. thermarum and E. graniderma .All three species are differentiable from other congeners by size as they are the smallest (length 8–10 mm; width 4.75–7.5 mm) group within Eurynotus . Additionally, these species (along with E. capensis ) possess distinct modifications to the male mid - and/or hindlegs (small setose excavations on the tibiae). Eurynotus barbosai is sharply separable from the most similar species ( E. thermarum and E.graniderma ) by the cuticular surface (shining and relatively smooth in E. barbosai versus dull and microtuberculated in the other two) and with additional micropunctation in the inter - stices between punctures ( E. thermarum and E. graniderma instead with microtuberculation, or without additional specific intersti - tial structures, respectively). Additionally, while all three species are localized around north–north -eastern South Africa, Eurynotus barbosai is, as of this revision, the only species with a distribution east of Eswatini and into Mozambique.

Redescription: Length 9–10mm 5–5.5 mm. Head: Punctures sep - arated by ≥1 puncture diameter. Mentum without apical notch. Eye with deeply impressed sulcus around margin. Prothorax: Pronotum smooth, shiny, and finely punctate; larger punctures sep - arated by ≥1 puncture diameter with micropunctures in interstices. Hypomeron shallowly and coarsely punctate; lightly sculptured/ wrinkled. Pterothorax: Elytral interval X terminating between hind coxae and elytra apex. Epipleuron wider than width of elytral intervals 9 + 10. Elytral intervals obscured by epipleuron in ventral view.Dorsally shining and without microtuberculation. Abdomen: Punctate. Abdominal ventrite V finely punctate, punctures separ - ated by ≥1 puncture diameter without larger, setigerous punctures intermixed and without micropunctation. Females without me - dian apical notch. Legs: Male mid - and hindlegs with setose patch or groove on tibiae. Female legs unmodified. Tarsi with golden setae. Males: pro/meso tarsi expanded with large, ventral, tomen - tose pads. Male terminalia: Parameres broad and parallel, truncate at apex with small divot made by medially inflexed parameres. Female terminalia: Bursa copulatrix sac -like and without sclerites, spermatheca thick and coiled, accessory gland and accessory pouch present.

Material examined: Holotype (TMNH): ‘Lour, Marques Jan. Rev. H.A, Junod; 3864; Eurynotus sp ign.; Holotype No: 1849 Eurynotus barbosai KOCH’.

Additional Material: TMNH: ‘ Marracuene’ , ‘SOUTH AFRICA, NATAL Ndumu Game Reserve 26.54S 32.15E, 05–07.xi.1984. R. Oberprieler’ .

Distribution: Mozambique and South Africa (Fig. 10).

Figures

Figure 3. Eurynotus sens.nov.species. A, Eurynotus alticola Koch Lectotype; B, E.asperatus Mulsant and Rey Lectotype; C, E. rudebecki Koch syn. nov.of E. asperatus Holotype; D, E.barbosai Koch Holotype; E, E. capensis (Fabricius) Lectotype; F, E.constrictus Koch Lectotype; G, E. graniderma Koch Holotype; H, E. privisolum sp.nov.Holotype; I, E. sulcimargo Koch Lectotype; J, E. thermarum Koch Holotype.

Figure 7. Phylogeny of morphology, ovovivipary, and female reproductive structures of Eurynotina.A, Eurynotus barbosai, 1st instar larva dissected from bursa copulatrix. B, Biolus omeri, genital tubes. C, B. brunoi, spermatheca and ovipositor.D, E. capensis, genital tubes of two individuals.E, B.analisetosus, sclerite and egg dissected from bursa copulatrix. F, B. granulatus, sclerite from bursa copulatrix.G, E. asperatus, paired sclerites on distal part of bursa copulatrix. H, Oncotus cedrimontis, bursa copulatrix. Abbreviations: c1–c4, lobes of coxities. Numbers in parentheses represent characters and states used in analysis.

Figure 8. Aedeagal morphology of Eurynotina species.A, Biolus analisetosus; B, B.asperipennis; C, B. brunoi sp. nov.; D, B. denticosta; E, B. graafi; F, B. granulatus; G, B. omeri; H, B. sauroides; I, Eurynotus asperatus; J, E.barbosai; K, E. capensis; L, E. graniderma; M, Capidium tuberculatum; N, Oncotus cedrimontis; O, Heteropsectropus amaroides; P, Schyzoschelus africanus. Parameres highlighted red. Scale = 1mm.