Ivierhipidius youngi, Barclay & Sw, 2015

Barclay, Maxwell V. L. & Sw, London, 2015, Ivierhipidius, an enigmatic new Neotropical genus of Ripiphoridae (Coleoptera: Tenebrionoidea) with four new species, Acta Entomologica Musei Nationalis Pragae 55 (2), pp. 691-701 : 696

Ivierhipidius youngi sp. nov.

( Figs 3–4 , 13 )

Type locality. South America, Ecuador, Napo Province, Baeza, 2000 m a.s.l.

Type material. HOLOTYPE: J, ‘ ECUADOR: Napo / Baeza , 2000m [pr] // 5.III.1979 / S. Marshall // CNC [printed purple card]ʼ ( CNC).

Diagnosis. Male (holotype). Length 5.7 mm (combined length of head, pronotum and elytra measured individually), greatest width 1.5 mm across elytral shoulders. Beetle entirely very dark brown to black, except final (11 th) antennomere a sharply contrasting yellow. Abdomen missing from the only known specimen. Head, thorax and elytra coarsely and evenly punctured, puncturation of thorax less regular and more confluent than elytra; punctures of base of elytra close, becoming more widely spaced towards apex. Entire beetle covered in long semirecumbent greyish black pubescence. Elytra long, parallel-sided, 2.4× as long as wide. Legs long, covered in long greyish black pubescence.

Differential diagnosis. This is one of the most distinctive species of the genus, the only one which is entirely black (except the apical antennomere); compared to other species, the elytra of I. youngi sp. nov. are proportionally much longer and narrower. See also the key below.

Collection circumstances. This species is known from a single specimen collected in March at 2000 m above sea level. Circumstances of collecting are not known, though the collector is a specialist on Diptera.

Etymology. This species is named in honour of Dr. Daniel K. Young of Wisconsin, specialist of Pyrochroidae , who kindly made material of this new taxon that he had accumulated over many years, including this specimen, available to me for study. The name is a noun in the genitive singular.

Distribution. The only known specimen of Ivierhipidius youngi sp. nov. is from moderately high altitude (2000 metres above sea level) at Baeza, in the Canton of Quijos, Napo Province, Ecuador.

Figures

Figs 1–4. Habitus. 1–2 – Ivierhipidius paradoxus sp. nov.: 1 – holotype, dorsal view; 2 – paratype, lateral view. 3–4 – I. youngi sp. nov.: 3 – holotype, dorsal view; 4 – holotype, lateral view. Images by Harry Taylor (Natural History Museum London).

Figs 10–15. 10–11 – detail of heart-shaped, deeply indented metatrochanter (10 – I. paradoxus sp. nov., paratype; 11 – I. monneorum sp. nov., holotype). 12–15 – detail of head, frontal view: (12 – I. paradoxus sp. nov., paratype; 13 – I. youngi sp. nov., holotype; 14 – I. cechorum sp. nov., paratype; 15 – I. monneorum sp. nov., paratype). Scale bars = 1 mm. Images by Harry Taylor (Natural History Museum, London).