Psammoecus luchti, Karner, 2012

Karner, Michael, 2012, A revision of African Psammoecus (Coleoptera, Silvanidae) and descriptions of two new species from the collection of the Musée royal de l’Afrique centrale, European Journal of Taxonomy 17, pp. 1-31: 14-16

publication ID

http://dx.doi.org/10.5852/ejt.2012.17

publication LSID

lsid:zoobank.org:pub:1238951A-FE17-40B2-9DCD-9D7939BECD09

DOI

http://doi.org/10.5281/zenodo.3858736

persistent identifier

http://treatment.plazi.org/id/03BB8D13-E11A-FF94-FDDB-7C658558FBB3

treatment provided by

Carolina

scientific name

Psammoecus luchti
status

sp. nov.

Psammoecus luchti   sp. nov.

( Fig. 6 View Fig )

Etymology

The name is dedicated to Wilhelm Lucht (1922-2000), who provided the author with much helpful advice in the course of his first steps into entomology.

Material examined

Holotype

♂: ‘I.R.S.A.C. – Mus. Congo | N. Rhodesia: Mpika | (Muchinga Mts.) 1700 m. | VII.1960 N. Leleup’, ‘ Dans | l’humus’ [blue label], ‘ HOLOTYPUS | Psammoecus   | luchti | des. Karner’ [red label] ( MRAC).

 

Paratypes

1♂ ‘COLL. MUS. TERVUREN | Kivu: Butembo | alt. 1740 m. III.1965 | M.J. Celis et collab.’, ‘sous | Dendrocalamus’, ‘ PARATYPUS | Psammoecus   | luchti | des. Karner’ [red label] ( MKF). 1♂ ‘COLL. MUS. CONGO | Katanga: gal. forest. | de la Kisanga IX- | N. Leleup 1948 | (Env. d’ Elisabethville)’, ‘Récolté dans | humus’ [blue label], ‘ PARATYPUS | Psammoecus   | luchti | des. Karner’ [red label] ( MKF). 1 spm ‘I.R.S.A.C. – Mus. Congo | N. Rhodesia: Abercorn, | 1800m. | VII.1960 N. Leleup’, ‘Galerie forestière | de la Mwengo, | dans l’humus’, ‘ PARATYPUS | Psammoecus   | luchti | des. Karner’ [red label] ( MRAC). 1 spm ‘I.R.S.A.C. – Mus. Congo | N. Rhodesia: Danger Hill | à 45 km. N. de Mpika | VII.1960 N. Leleup’, ‘Humus | de galerie | forestière’ [blue label], ‘ PARATYPUS | Psammoecus   | luchti | des. Karner’ [red label] ( MRAC). 3 spms ‘I.R.S.A.C. – Mus. Congo | N. Rhodesia: Mpika | (Muchinga Mts.) 1700 m. | VII.1960 N. Leleup’, ‘Dans | l’humus’ [blue label], ‘ PARATYPUS | Psammoecus   | luchti | des. Karner’ [red label] ( MRAC).

Diagnosis

Lateral margins of pronotum rounded, bearing five distinct teeth with wide bases. Elytra elongate-oval, bright reddish-brown with dark, transverse band at beginning of posterior portion, sometimes with darkened suture near elytral apex; striae on elytral disc slightly wider than interstices. Parameres small, elongate, spatula-shaped.

Differential diagnosis

Ps. luchti   sp. nov. differs from Ps. simoni Grouvelle, 1892   by the elytral striae being only slightly wider than the interstices, elytra being more elongate, elytral basis not darkened. It differs from Ps. hacquardi   and Ps. marginicollis   by wider bases of lateral teeth of pronotum; from Ps. hacquardi   also by wider elytral striae and elytral basis not darkened; from Ps. marginicollis   , Ps. parallelus   , Ps. leleupi   sp. nov., Ps. simoni   , and Ps. laetulus   by spatula-shaped parameres. It further differs from Ps. leleupi   sp. nov. and Ps. laetulus   by elytral basis not darkened; from Ps. personatus   by shorter lateral teeth of pronotum with wider bases; and from Ps. laetulus   by more rounded lateral margin of pronotum.

Description

BODY. Elongate oval, total length 2.80-3.19 mm ( Fig. 6A View Fig ). Bright reddish-brown, elytra with dark, transverse band at beginning of posterior portion, some specimens also with darkened suture near elytral apex. Antennae with 7 th- 10 th antennomere blackish brown, some specimens with darkened apex of 6 th antennomere. 11 th antennomere, sometimes also 10 th antennomere, bright yellowish brown, brighter than basal antennomeres.

HEAD. Very wide, with large, protuberant eyes, temples narrowed immediately behind eyes. Head width 0.79-0.88 mm, length 0.44-0.48 mm, 1.75-1.96 times as wide as long. Eyes 0.20-0.23 mm long, distance of inner margins 0.50-0.60 mm. Puncturation on vertex coarse, relatively dense, distance between punctures irregular; pubescence composed of long erect setae, directed anteriorly; microsculpture absent. Longitudinal impressions on vertex distinct, short, attaining second third of eyes. Antennae as in Fig. 6B View Fig , long and slender, 1.45-1.55 mm long, antennomere proportions of holotype as follows: 2.6: 1.1: 1.4: 1.3: 1.5: 1.4: 1.3: 1.1: 1.0: 1.1: 2.1.

PRONOTUM. Broad, shallowly impressed near apical margin and apical angles, width 0.80-0.96 mm, length 0.60-0.73 mm, 1.28-1.40 times as wide as long. Anterior angles with group of very small teeth, lateral margins with five distinct, triangular teeth; tooth I small, tooth II larger, tooth III largest, tooth IV slightly smaller than tooth III, tooth V smallest; posterior angle with very small angular tooth. Puncturation and pubescence on disc as on vertex; microsculpture absent.

ELYTRA. Elongate oval, length 1.85-2.05 mm, combined width 1.15-1.40 mm, 1.44-1.65 times as long as their combined width. Rows of punctures on disc slightly wider than interstices, pubescence composed of semierect setae that are somewhat shorter as on head and pronotum; microsculpture absent.

PARAMERES. Small, elongate; base less than 2 times as wide as apical extension, inner margins with few short setae, inner portion of apex with four longer setae, outer portion with one shorter and one longer seta ( Fig 6C View Fig ).

MRAC

Belgium, Tervuren, Musee Royal de l'Afrique Centrale

MRAC

Musée Royal de l’Afrique Centrale