Orateon praestans, a remarkable new genus and species from Yemen (Coleoptera: Histeridae: Saprininae) Author Lackner, Tomáš Czech University of Life Sciences, Faculty of Forestry and Wood Sciences, Department of Forest Protection and Entomology, Kamýcká 1176, CZ- 165 21 Praha 6 - Suchdol, Czech Republic; e-mail: tomaslackner @ me. com Author Ratto, Giovanni Via Leonardo Montaldo 40 / 9, 16137 Genoa, Italy; e-mail: pactolinus @ hotmail. com text Acta Entomologica Musei Nationalis Pragae 2014 2014-12-15 54 2 515 527 journal article 10.5281/zenodo.5300713 0374-1036 5300713 06AB713B-00FA-43B7-BE19-DE1FBE02DBB6C Orateon gen. nov. Diagnosis. Rather small ovoid saprinine genus with entirely punctate dorsal surface, complete set of dorsal elytral striae, strongly narrowed pronotum with correspondingly small head; pronotal hypomeron, elytral epipleuron, lateral disk of metaventrite, metepisternum, metepimeron and all abdominal ventrites laterally with amber setae. Sub-apical tooth on both mandibles large, well developed; labrum with labral pits adorned with two setae; eyes flattened; penultimate labial palpomere with a single long seta. Antennal club almost completely glabrous apart from one deep, almost circular slit-like sensory area on apical surface. Both sets of prosternal striae present, prosternal process compressed laterally, carinal prosternal striae very approximate, almost confluent; prosternal foveae absent. Protibial spur large, bent, growing out from near the protarsal base, claws of last segment of tarsomere as long or longer than it. Femora and tibiae not particularly thickened; posterior surface of both meso- and metatibiae with long dense amber setae. Eighth sternite of male genitalia apically with rather small velum covered with short sparse setae; spiculum gastrale gradually dilated from middle towards both ends; apex of aedeagus blunt, basal piece of aedeagus rather long. Differential diagnosis. Externally resembling Alienocacculus Kanaar, 2008 and Terametopon Vienna, 1987 with which it shares three characters: 1) pen-ultimate labial palpomere with a single, long seta; 2) presence of large protibial spur growing out from near tarsal insertion; 3) ciliate elytral epipleuron. Largely, Orateon differs from the members of Alienocacculus by the absence of prosternal foveae, which are always present in Alienocacculus and from the members of Terametopon it differs by the presence of labral pits and with them associated labral setae. For the complete enumeration of the characters outlining the shared characters and differences between the three aforementioned taxa see also Table 1 . Figs 1–4. Orateon praestans gen. & sp. nov. 1 – habitus, dorsal view; 2 – same, ventral view; 3 – head, frontal view; 4 – antennal club, ventral view. Fig. 5. Orateon praestans , gen. & sp. nov., sensory structures of the antennal club. Table 1. Comparison of Orateon gen. nov. with the presumably related genera/subgenera Alienocacculus Kanaar, 2008 , Terametopon s. str. Vienna, 1987 and Psammoprinus Gomy & Vienna, 1996 .

Alienocacculus	Terametopon s. str.	Psammoprinus	Orateon gen. nov.
Antennal club	Glabrous except of	Glabrous except of	Dorsal upper two-	Glabrous except of
one deep, almost	one deep, almost	thirds (roughly) of	one deep, almost
circular slit-like sen-	circular slit-like sen-	antennal club cove-	circular slit-like sen-
sory area on ventral	sory area on ventral	red with dense short	sory area on ventral
surface	surface	sensilla intermingled	surface
with scattered longer
sensilla; lower third
(roughly) glabrous
Frontoclypeal	Absent	Present	Absent	Absent
projection
Labral pits	Present	Absent	Absent	Present
Anterior margin	With deep emargi-	Without emargi-	Without emargi-	With deep
emargiof mentum	nation	nation	nation	nation
Sub-apical tooth	Large, circular	Small	Large, circular	Large, circular
of mandibles
Pronotal shape	Not strongly conver-	Not strongly conver-	Sides strongly con-	Sides strongly con-
gent anteriorly	gent anteriorly	vergent anteriorly	vergent anteriorly
Prosternum shape	Flattened to slightly	Flattened to slightly	Concave, setose	Flattened to slightly
and chaetotaxy	concave, asetose	concave, asetose	concave, asetose
Prosternal foveae	Present	Absent*	Absent	Absent
Meso-metaventral	Present	Absent	Absent	Present
stria
Protibial spur	Large, bent, situated	Large, bent, situated	Large, bent, situated	Large, bent, situated
near tarsal insertion	near tarsal insertion	near tarsal insertion	near tarsal insertion
Eighth sternite:	Without setae	With short setae	With short setae	Without setae
apex chaetotaxy	laterally	laterally	laterally	laterally
Spiculum gastrale	Almost parallel with	Gradually dilated	Gradually dilated	Gradually dilated
abruptly dilated ba-	from middle towards	from middle towards	from middle towards
sal and apical ends	both ends	both ends	both ends
Aedeagus	Pointed apically	Blunt apically	Blunt apically	Blunt apically

* Except for one species Terametopon ( T .) foveatus Lackner, 2009 Biology. The type series of this species was collected in the sand of the Tihamah coastal plain ( Fig. 24 ) spreading approximately from Mecca in Saudi Arabia to Aden in Yemen , containing mostly Afrotropical fauna. Beetles were attracted by human faeces, and presumed to have colonized it during the night ; they were present also under the ‘ball’ of human faeces constructed by a couple of dung beetles Metacatharsius inermis (Laporte de Castelnau, 1840) early in the morning, approximately 1 meter from the faeces-baited trap (D. Král, pers. comm 2013). Distribution. Yemen , Al Hudaydah governorate ( Fig. 25 ). Etymology. “ Orateon ” from Greek ÓȡĮIJȐȠȞ, is the verbal adjective derived form verb ÓȡȐȦ meaning “to see, to look”. The verbal adjectives derived using the af¿x -IJȐȠȢ, -IJȐĮ, -IJȐȠȞ usually imply necessity or urgency, hence the literal meaning of the name is “the one, that has to be seen”. The ancient Greek word starts with breathing, which was omitted intentionally to connect the name of the beetle to the Modern Greek adjective ȠȡĮȚȠȢ (meaning beautiful) as well. Gender is neuter.