SOME NEW SPECIES OF DEATH WATCH BEETLES OF THE GENUS LASIODERMA STEPHENS, 1835 (СOLEOPTERA: PTINIDAE, XYLETININAE) FROM ISRAEL

I. N. Toskina

Abstract


In the present paper there are described 4 new species of the genus Lasioderma from  Israel:

L. erdosi sp.n. Head and ventral surface black, dorsal surface, antennae and legs brown, elytral apices rufous. Pubescence slightly suberect; surface with dual punctation. Eyes slightly oval. Anten- nae: 3rd segment 1.6 times as long as the 2nd one; 3–5th segments with oblique anterior margin; 6–9th segments with convex lateral one. Pronotum 1.5 times as wide as long, with posterior angles. Pubescence parted to two sides on apical quarter of pronotal disc. Elytra 1.6 times as long as wide; punctures of punctation are larger and sparser than they are on pronotum. Anterior rims of metaster- num are approximated in the middle, 1st rim is straightened, 2nd one curved forward. Fore tibiae not dilate towards apices. First segment of hind tarsus is 3.6 times as long as the 2nd one. Pseudopositor: styles are conical, coxite’s top with numerous short chaetae. Length 2.3 mm. The new species differs from closely related species (L. obscurum) by the form of antennal segments and length of the 1st tarsi segment (which is 1.5 times as long as the 2nd one in L. obscurum).

L. griseopilosum sp.n. Beetle brown, antennae and elytral apices yellow. Pubescence appressed. Surface with uniform punctation. Eyes round. Antennae: 3rd segment is as long as the 2nd one. 3–5th segments with oblique anterior margin; 3–8th segments with straight and 9–10th one with convex lat- eral margins. Pronotum 1.5 times as wide as long, with poorly developed posterior angles; pubescence parted to two sides on pronotal disc. Elytra 1.5 times as long as wide. Anterior rims of metasternum are approximated and straightened in the middle. Fore tibiae not dilate towards apices. First segment of hind tarsus 1.6 times as long as the 2nd one. Pseudopositor: styles conoid; coxite’s top with a few long chaetae. Length 3 mm. The new species differs from similar species by homogeneous pubescence


 

(from L. baudii), by the short 3rd antennal segment and elytra (from L. redtenbacheri), by pronotum with posterior angles (from L. nitentis).

L. nitentis sp.n. Beetle shining, dark yellow, antennae pale yellow. Pubescence heterogeneous, suberect. Eyes round. Antennae: 3rd segment is as long as the 2nd one. 3–5th segments with oblique anterior margin and straight lateral one. Pronotum 1.6 times as wide as long, without posterior angles, pubescence parted to two sides on pronotal disc; surface with dual punctation. Elytra 1.5 times as long as wide; surface with uniform punctation. Anterior rims of metasternum are evenly rounded. Fore tibiae not dilate towards apices; 1st segment of hind tarsus 1.3 times as long as the 2nd one. Pseudoposi- tor: styles baculiform. Length 1.8 mm. The new species differs from similar species by pubescence arranged in disorder (from L. baudii), by short 3rd antennomere and elytra (from L. redtenbacheri), by pronotum without posterior angles and surface with dual punctation (from L. griseopilosum).

L. opacum sp.n. Beetle brown, antennae dark yellow. Pubescence yellowish-grey, fine, dense, ap- pressed. Eyes round. Antennae: 3rd segment 1.5 times as long as the 2nd one; 4–5th segments with con- cave and oblique anterior margin and almost straight lateral one; 6–7th segments with convex lateral margin (8–11 segments are lost). Pronotum 1.64 times as wide as long, without posterior angles; lateral margins are flattened; surface with uniform punctation. Elytra 1.55 times as long as wide; surface  with dense dual punctation. Anterior rims of metasternum are approximated in the middle, 2nd rim is convex and slightly curved forward. Fore tibiae not dilate towards apices; 1st segment of hind   tarsus

1.7 times as long as the 2nd one. Pseudopositor: style: its apical conical part attached to widened base. Length 4.25 mm. The new species differs from similar species by pronotum without posterior angles (from L. enode, L. haemorrhoidale, L. hreblayi), by short pronotum and elytra (from L. iordanicum), by 3–5th antennomeres with oblique anterior margins, large eyes, and form of styles (from L. kiesen- wetteri in which antennomeres 3–4th are with oblique anterior margins, eyes are smaller, styles look like as conjugate papillae), by small punctures in surface punctation (from L. punctulatum).


Keywords


Lasioderma, Xyletininae, Ptinidae, Coleoptera, new species, Israel.

References


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