Biolus denticosta (Mulsant and Rey)

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 : 377

4. Biolus denticosta (Mulsant and Rey) comb. nov.

( Figs 2D , 6D, F , 8D )

Eurynotus denticosta Mulsant and Rey, 1854a: 29 .– Mulsant and Rey 1854b: 173; Gebien 1938: 414; Koch 1954a: 276; 1954b: 2; 1955: 420; Banaszkiewicz 2006: 63; Kamiński 2016: 237.

Diagnosis: Biolus denticosta is arguably the most straightforward to diagnose species (along with B. sauroides ).The structure of the elytra is unique within the genus (with extremely large puncta - tion and costae giving the appearance of a lattice -like structure). A redescription is provided here along with our morphological

analyses to help support this species’ inclusion in Biolus, out - line differences with other, more distantly related but morpho - logically similar taxa (e.g. genus Zadenos Laporte from subtribe Melambiina; see: Kamiński 2015), and provide a more detailed, up -to -date description.

Redescription: Length 9–12 mm; width 3–5 mm.Head: Intensely, coarsely punctate, punctures closely spaced, separated by ≤1 puncture diameter to confluent. Mentum with apical notch. Eye with strongly impressed sulcus situated around perimeter of dorsal lobe. Prothorax: Pronotum coarsely punctate, punctures separated by ≤1 puncture diameter to confluent. Hypomeron rugose, with large and shallow punctures. Pterothorax: Elytron costate, with macrotubercles on disc on intervals between costae. Without microtuberculation on disc or epipleura. Abdomen: Punctate. Abdominal ventrite V coarsely punctate, punctures separated by ≥1 puncture diameter without larger, setigerous punctures. Faint marginal groove on apex. Females with median apical notch. Legs: Male midtibia with large spur -like projection at apex. Tarsi unmodified in males and females. Tarsal setae dark or black. Male terminalia: Parameres weakly tapered and broad, rounded apically. Female terminalia: Bursa copulatrix without sclerites or accessory pouch.

Material examined: Lectotype, here designated ( HNHM): ‘ C. B. Esp. Coll. R. Oberthür ex. Coll. Deyrolle / Paratypus 1854 Eurynotus denticosta Mulsant/ Red LECTOTYPE label’ Note: As the original description lacks information defining the number or specificity of specimens used, a specimen from the presumed syntype series is here designated as a lectotype to fix the taxonomic status of the species. Paralectotype ( HNHM): Same labels as Lectotype, with additional yellow ‘PARALECTOTYPE’ label.

(See Supporting Information, Appendix S1 for additional ma - terial examined.)

Distribution: South Africa (Fig. 9).

Figures

Figure 2. Biolus stat.nov.species.A, Biolus analisetosus (Koch) comb. nov. Holotype; B, B.asperipennis (Mulsant and Rey) stat.res., comb.nov. Lectotype; C, B. brunoi sp. nov. Holotype; D, B. denticosta (Mulsant and Rey) comb. nov. Lectotype; E, B. graafi (Koch) comb. nov. Holotype; F,B. granulatus (Fabricius) comb. nov. Lectotype; G, B. omeri (Koch) comb.nov.Holotype; H, B. sauroides (Koch) comb. nov. Holotype; I, Eurynotus norrisi Mulsant and Rey syn. nov. of B. granulatus, Lectotype.

Figure 6. Characters used in the cladistic analysis.Arrows indicate particular states of given characters from the morphological matrix [e.g.

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.