identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
8C1EC7647ED05AB7806D89C7F78C81BF.text	8C1EC7647ED05AB7806D89C7F78C81BF.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Archaeocerus uenoi Perreau 2019	<div><p>Archaeocerus uenoi Perreau, 2019</p><p>Description.</p><p>Length: 1.2 mm (male) or 1.5 mm (female). Body elongate (Figs 2, 3), flattened (Fig. 4), dark brown; antennae, legs, and mouthparts light brown.</p><p>Head. Antennal insertions concealed in dorsal view (Fig. 5). Epistomal suture, epistomal stem missing, microreticulation if any, indistinct (Fig. 5). Antennae with 11 antennomeres, 8 th antennomere extremely flat and significantly narrower than 7 th, 9 th, and 10 th, without teeth (Fig. 6). Gular sutures shallow but widely distant. Pronotum transverse, approximately 1.4 × as wide as long, widest very close to the base, with sides regularly arcuate and convergent anteriorly (Fig. 2). Surface shiny, with tiny punctures and fine microreticulation, without transverse strigae (Fig. 2). Lateral margins with distinct gutter (Fig. 2).</p><p>Elytra approximately 1.4 × as long as wide jointly, parallel in the two basal third of their length, then regularly rounded at apex. A single parasutural longitudinal stria. Puncture transversely aligned in oblique strigae and associated with short setae (Fig. 2). Surface shiny, with no visible microreticulation. Marginal gutter fairly wide (Fig. 2).</p><p>Flight wings present and probably functional, with nervation present near the base, reduced on the apical half and with numerous microtrichia and with ciliate margins.</p><p>Ventral structures. Anterior part of prosternal surface elongated in front of procoxae (Fig. 2). Mesoventrum with sharp and uninterrupted longitudinal median carina. Metaventrum not carinate, but with wide medial depression located on top of a medial bulge (as the crater of a volcano). Metaventrite and first abdominal ventrite without setose paired impressions (white spots visible on the ventral surface on Fig. 2 are air bubbles, not setose impressions, without setae). Metacoxae clearly separate.</p><p>Legs. Tarsal formula 5-4 - 4 in both sexes (Figs 7 – 11). Female protarsi undilated. Male protarsi imperceptibly dilated, with tenent setae of two kinds on ventral side: some very long and straight, some others shorter, curved and slightly dilated at apex (Fig. 8). Their weak contrast in X-rays does not allow visualizing them clearly in microtomography. Meso- and metatarsi undilated and without tenent setae in both sexes (Figs 10, 11). Last protarsomere as long as the four preceding ones taken together, last meso- and metatarsomeres as long as the three preceding ones taken together (Figs 10, 11). No measurable sexual differences in the relative length of tarsomeres. All tarsi with two interongular setae. Protibias thickened in basal half, bearing in both sexes an area lined with dense bunch of setae on inner margin of apical half (Figs 7–9). Outer side of protibias spineless, outer side of meso- and metatibias with strong spines (Figs 10, 11).</p><p>Aedeagus parallel in two basal thirds then triangularly pointing at the apex in dorsal or ventral view (Figs 12, 14), flat in lateral view (Figs 13, 15). Probably due to the poor state of preservation, the base of the median lobe and of the tegmen is not accurately resolved so that the basal orifice is not visible and the whole median lobe is not exactly symmetrical, slightly deformed. Parameres slightly shorter than the median lobe (Figs 12–14), with two subapical distant setae, distal one on the outer side, proximal one on dorsal side (Fig. 19). Parameres seemingly disconnected from indistinct basal part of tegmen. Endophallus with wide basal structure with two lateral expansions (Fig. 18) and long stylus, roughly cylindrical, not closed on the dorsal side, with more or less gutter shape (Figs 16, 17). A transversal cut taken from one slice of the nano-tomographic reconstruction is shown on Fig. 20. Flat and 3 D videos of the aedeagus including the endophallus are given in Suppl. materials 1, 2.</p><p>Ventrite VIII male and female both with spiculum ventrale (Figs 21–23). Male genital segment only partly distinct, making impossible to determine its general morphology. Female genital segment as in Figs 22, 23. It is impossible to determine if the lack of visible appendicular parts in the female genital segment and the indistinct male genital segment are an actual depletion or reduction or if it results from the poor state of preservation.</p></div>	https://treatment.plazi.org/id/8C1EC7647ED05AB7806D89C7F78C81BF	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Pensoft via Plazi	Perreau, Michel;Njunjić, Iva;de Groot, Michiel D.;Van Caenegem, Warre;Haelewaters, Danny	Perreau, Michel, Njunjić, Iva, de Groot, Michiel D., Van Caenegem, Warre, Haelewaters, Danny (2025): Redescription of the Cretaceous species Archaeocerus uenoi Perreau, 2019 based on synchrotron radiation micro-tomography and nano-tomography (Coleoptera, Leiodidae, Catopocerinae). Subterranean Biology 52: 187-200, DOI: 10.3897/subtbiol.52.154293
