Mastigocoleus resinicola 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 : 7

publication ID	https://doi.org/ 10.1093/isd/ixac011
persistent identifier	https://treatment.plazi.org/id/CE115B46-8551-FFDE-FF14-E46621317005
treatment provided by	Felipe
scientific name	Mastigocoleus resinicola Tihelca & Cai
status	sp. nov.

Treatment

Mastigocoleus resinicola Tihelca & Cai sp. 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: E4D49512-9ADD-41E2-B684-E0B90D4EED98

Figs. 1–2 View Fig View Fig

Material. Holotype, NIGP174708 View Materials , sex unknown, a single well-preserved amber inclusion ( NIGP).

Tope Localito and Horizon. Amber mine in the Hukawng Valley, Myitkyina District, Kachin State, Myanmar; latest Albian to Albian/?enomanian boundary (Lower–Upper?retaceous boundary).

Diagnosis. As for genus together with: clypeus lacking a horn (although this may be a sexually dimorphic character); pronotal disc slightly convex (with a medial depression in M. rhinoceros ); pronotum broadest medially (broadest in posterior half in M. rhinoceros ).

Description. Body length 6.53 mm, body width 2.24 mm. Head 1.25 mm long, 1.4 × wider than long. Antennomere I broadening apically, 1.8× wider than following antennomere; antennomere II attached subapically to antennomere I; antennomere III longer than preceding antennomere, 1.1× longer; antennomeres V–XI gradually thinning and lengthening apically; antennomere XI pointed apically, 1.1× longer than preceding antennomere, maximum width at base representing less than 0.1× maximum width of antennomere I. Ratio of antennomere lengths (in mm): 0.49: 0.20: 0.22: 0.32: 0.38: 0.35: 0.41: 0.36: 0.38: 0.31: 0.41. Pronotum 1.38 mm long, 1.4× wider than long, broadest medially. Anterior pronotal angles acute. Pronotal disc slightly convex. Posterior angles of pronotum indistinctly produced, orthogonal, rounded apically. Procoxae separated by less than their width. Prosternal process thinner, not bordered laterally. Apex of prosternal process lanceolate, with apex thinner and slightly curving toward thorax. Medial mesoventral cavity deeply impressed, broadest in basal third, narrowing apically ( Fig. View Fig

2F: mca). Mesocoxae almost contiguous. Elytra 3.90 mm long, 1.7× longer than their combined width. Elytrae with nine faint, complete striae. Hind wings present, apex of folded wings visible under elytra ( Fig. 1A View Fig ). Protibia slightly longer than profemur, mesotibia as long as mesofemur, metatibia slightly longer than metafemur. Metatibia not abruptly expanded at apex, with a wide groove ( Fig. 2G View Fig : tb2). Metatibial spur reaching to middle of metatarsomere IV. Tarsomeres I–III short, wider than long; tarsomere IV slightly longer, longer than wide; tarsomere V as long as combined lengths of preceding tarsomeres. Pretarsal claws more or less straight; mesopretarsal claws as long as two thirds of mesotarsomere V, metapretarsal claws as long as combined lengths of metatarsomeres IV and V. Margins of ventrites weakly arcuate. Ratios of ventrite lengths: 0.71: 0.59: 0.41: 0.40: 0.56.

Etomologo. The specific epithet refers to the preservation of the species in fossil resin, combining the Latin noun r ē s ī na, meaning, ‘resin’, with the masculine suffix – cola, which denotes an ‘inhabitor’.