Ceafornotensis archratiras, Woolley, Christopher, 2016

Woolley, Christopher, 2016, The first scarabaeid beetle (Coleoptera, Scarabaeidae, Melolonthinae) described from the Mesozoic (Late-Cretaceous) of Africa, African Invertebrates 57 (1), pp. 53-66 : 57

Taxon classification Animalia Coleoptera Scarabaeidae

Ceafornotensis archratiras sp. n. Figs 2, 3, 4

Etymology.

A combining of Greek archaíos (ancient) and Greek kratíras (crater) in reference to the crater lake origin of this specimen.

Description.

medium-sized oval body, mandibles and labrum exposed beyond clypeus, left mandible short, dentate with single acute apical tooth, broad subapical tooth and distinct molar region, outer margin abruptly angled mesally, clypeus trapezoidal, eye partially divided by genal lobe, antennal club with three lamellae, lamellae elongate and narrow, pronotum broad, protibia with single lateral tooth mesally, metatibia with single transverse carina mesally, metatibial apex with 2 spurs, spurs adjacent, unequal in length, ‘inner’ spur extending just beyond tarsomere 1, ‘outer’ spur extending just beyond tarsomere 2, tarsomeres 1, 2, broad, not elongate, metatibia with single transverse carina mesally, metatibial apex with 2 spurs, spurs adjacent, unequal in length, ‘inner’ spur extending to tarsomere 2, ‘outer’ spur extending to tarsomere 3, tarsomeres 1, 2, broad, not elongate, mid and hind coxae contiguous, six visible sternites, terminal sternite exposed beyond elytra, median lobe of aedeagus absent/reduced, parameres long relative to basal piece.

Measurements

(mm). body length from mandible apex to terminus of abdomen, 11.64; mandible length, 0.77; labrum length, 0.26; labrum width, 0.72; clypeal width 1.64; width between eye orbits, 1.69; Length of lamellae, 0.69; pronotal width, 4.71; humeral width, 4.87; elytron length, 6.25; elytron width, 2.82; profemur width, 1; profemur length, 2.15; protibial length, 1.97; mesofemur width, 0.92; mesotibial length, 1.59; mesotibial width at apex, 0.51; mesotibial spur length, inner 0.38, outer 0.87; length of mesotarsal segment 2, 0.36; Width of mesotarsal segment 2, 0.26; metafemur width, 0.92/1.02; metatibial length, 2.31; metatibia width at apex, 0.71; metatibial spur length, inner 0.87, outer 1.33; length of metatarsus, 2.31; length of metatarsal segments 1, 0.4; 2, 0.38; 3, 0.46; 4, 0.38; 5, 0.61 (without claws 0.41); length of metatarsal segments 2, 0.31; 3, 0.21; 4, 0.13; 5, 0.13; length of basal piece 0.76; length of parameres 0.71.

Holotype.

BP/2/18654 BOTSWANA: Central District: Orapa Diamond Mine, 21°18'27.9"S, 25°22'10.6"E; Late Crateous, Turonian, Orapa epiclastic kimberlite.