Mastigocoleus Tihelca & Cai, 2022

Tihelka, Erik, Jäch, Manfred A., Kundrata, Robin, Li, Yan-Da, Engel, Michael S., Lozano-Fernandez, Jesus, Huang, Diying & Cai, Chenyang, 2022, Mastigocoleidae fam. nov., a New Mesozoic Beetle Family and the Early Evolution of Dryopoidea (Coleoptera), Insect Systematics and Diversity 6 (3), pp. 1-18 : 6

Mastigocoleus Tihelca & Cai gen. nov.

h t t p: / / z o o b a n k. o r g / u r n: l s i d: z o o b a n k. org:act:077B7?05-81?7-4F73-BE50-DE28A?1D0599

Figs. 1–4

Tope Species. Mastigocoleus resinicola Tihelka &?ai sp. nov.

Included Species. Mastigocoleus resinicola and M. rhinoceros .

Occurrence. Aptian–Albian?rato Formation in Brazil ( M. rhinoceros , represented by two specimens) ; and Albian –?enomanian amber from northern Myanmar ( M. resinicola , represented by one specimen) .

Diagnosis. Antennomeres II–XI pronouncedly tapering apically (less pronouncedly in Cretaceocoleus ). Mesotarsi without ventral rami (sometimes present in Cretaceocoleus ). Anterior pronotal angles acute (approximately orthogonal in Cretaceocoleus ). Posterior angles of pronotum indistinctly produced and orthogonal (strongly produced and acute in Cretaceocoleus ). Procoxae separated by less than their width (by approximately their width in Cretaceocoleus ). Prosternal process thinner, not bordered laterally (broader and bordered laterally in Cretaceocoleus ). Mesocoxae almost contiguous (separated by close to half their width in Cretaceocoleus ). Metatibia not distinctly expanded at apex (distinctly expanded apically in Cretaceocoleus ). Tibial spurs elongate and stout, longer than metatarsomere I (short and thin, no longer than tarsomere I in Cretaceocoleus ). Elytra with nine longitudinal striae (striae punctate in Cretaceocoleus ). Margins of ventrites weakly arcuate (strongly arcuate in Cretaceocoleus ).

Etomologo. The name is a combination of the Ancient Greek nouns ‘ mást ī gos ’ (μάστ ῑ γος, feminine genitive singular of μάστ ῑ ξ / mást ī x), meaning, ‘whip’, and ‘ koleós ’ (Κολε ό ς), meaning, ‘scabbard’ and from which the ordinal name?oleoptera is derived. Gender: masculine.

Figures

Fig. 1. Habituk of Mastigocoleus resinicolaTihelca & Cai gen. et kp. nov. (NIGP174708) from the mid-Cretaceouk amber from northern Myanmar in (A) dorkal and (B) ventral viewk. Scale bark = 1 mm.

Fig. 2. Morphological detailk of Mastigocoleus resinicolaTihelca & Cai gen. et kp. nov. (NIGP174708) from the mid-Cretaceouk amber from northern Myanmar. (A) Head in dorkal view; (B) compound eye in dorkal view; (C) mouthpartk in ventral view; (D) antenna; (;) elytra; (F) thorax in ventral view; (G) metathoracic leg. Abbreviationk: a1–11, antennomerek 1–11; cx3, metacoxa; e, compound eye; fm1, profemur; fm2, mekofemur; fm3, metafemur; lb2–3, labial palpomerek 2–3; mca, mekoventral cavity; me, mentum; mp2–4, maxillary palpomerek 2–4; mtt5, metatarkuk 5; ppr, prokternal procekk; km, kubmentum; tb, metatibia; tb2, mekotibia; tc3, trochanter of metathoracic leg. Scale bark = 100 μm (B, G); 250 μm (A, C); 500 μm (D, F), 1 mm (;).

Fig. 3. Habituk of Mastigocoleus rhinocerosTihelca & Cai gen.et kp.nov.from the;arly Cretaceouk Crato Formation in northeaktern Brazil. (A) holotype (SMNS 66552); (B) paratype (AMNH SA43296). Scale bark = 1 mm.

Fig. 4. Morphological detailk of Mastigocoleus rhinocerosTihelca & Cai gen. et kp. nov. holotype (A, C, D) and paratype (B,;) from the;arly Cretaceouk Crato Formation in northeaktern Brazil. (A, B) Head and pronotum in dorkal view; (C) antenna; (D) elytral apex; (;) metathoracic leg; (;) elytra.Abbreviationk: a1–11, antennomerek 1–11; ch, clypeal horn; cl, claw; mtt, metatarkuk; tb3, metatibia. Scale bark = 500 μm (A–C,;), 1 mm (D).