Larinus

Gültekin, Levent, 2008, Taxonomic review of the stem-inhabiting trehala-constructing Larinus Dejean, 1821 (Coleoptera: Curculionidae): New species, systematics and ecology, Zootaxa 1714, pp. 1-18 : 5

Key to species of trehala-constructing Larinus

1 - Elytra with whitish-grey round spots or stripes ( Figs. 3, 4 )........................................................................2

- Elytra without whitish-grey round spots or stripes, grayish-white pubescence randomly scattered and only more condensed on some places ( Figs. 1, 2 )...............................................................................................3

2 - Elytra with several separated round whitish spots concentrated on intervals 2–5 and 8–10 ( Fig. 4 ); rostrum about 0.65 times as long as pronotum in male, some up to 0.80 times in female, deeply bisulcate on dorsal surface at basal half, base and apex of more or less equal width; third segment of fore tarsi about 1.10 times, that of hind tarsi 1.05 times as wide as second; aedeagus parallel-sided, very weakly swollen medially, narrowed at apex ( Fig. 5 ). Integument shiny black, body size 10.4–15.5 mm. Host plant: Echinops persicus . Syria, Iran, Transcaucasus, Turkmenia, Afghanistan................................. L. nidificans Guibourt

- Elytra with stripes on intervals 2–4 ( Fig. 3 ); male rostrum only slightly differing in length from that of female (about 0.74 times as long as pronotum in male, 0.76 times in female), gradually and weekly narrowed from base to apex, at apex 0.85 times as wide as at base; third segment of fore tarsi 1.40 times, that of hind tarsi 1.30 times as wide as second; aedeagus parallel-sided, gradually but weakly narrowed from base to apex ( Fig. 6 ). Integument matte, body size 8.8–12.7 mm. Host plant: Echinops sp. (new host record). Distribution: Rhodes, Syria, Iran (new record) Libya, Egypt (new record), Turkey (new record). ................................................................................................................................ L. hedenborgi Boheman

3 - Pronotum without white spots, clothed with very short whitish pubescence (Figs, 2, 24); aedeagus in dorsal view strongly swollen medially ( Fig. 7 ); tergite VIII ( Fig. 10 ) somewhat triangular, sternite VIII ( Fig. 13 ) tulip-shaped; spermatheca with very sharp apex ( Fig. 14 ). Surface of capsule “trehala” roughly tuberculate ( Fig. 23 ). Host plants: Echinops sphaerocephalus , E. pungens and Echinops sp. (new records). Distribution: Algeria, Libya, Syria, Palestine, Lebanon, Iran, Siberia, Caucasus, Turkey... L. rudicollis Petri

- Pronotum with white spots, whitish scales concentrating on pronotal sides to constitute three narrow lines on apical half ( Figs. 1 , 20 ); aedeagus in dorsal view not strongly swollen medially ( Fig. 8 ); tergite VIII ( Fig. 9 ) wide and semicircular, sternite VIII ( Fig. 12 ) trapeziform; spermatheca with blunt apex ( Fig. 11 ). Surface of capsule “trehala” more or less smooth ( Fig. 18 ). Host plant Echinops orientalis . Distribution: northeastern Turkey (Aras Valley) ................................................................................. L. capsulatus sp. n.

Figures

FIGURES 1 – 4. Dorsal habitas of trehala-building Larinus species. 1, Larinus capsulatus sp. n., male, holotype; 2, L. rudicollis, lectotype; 3, L. hedenborgi, lectotype; 4, L. nidificans, male.

FIGURES 5 – 14. 5 – 8. Dorsal aspect of aedeagus. 5, Larinus nidificans; 6, L. hedenborgi; 7, L. rudicollis; 8, L. capsulatus sp. n. 9 – 14. Female genitalia; 9, tergite VIII of L. capsulatus; 10, tergite VIII of L. rudicollis; 11, spermatheca of L. capsulatus; 12, sternite VIII of L. capsulatus; 13, sternite VIII of L. rudicollis; 14, spermatheca of L. rudicollis.

FIGURES 21 – 26. Echinops orientalis, host plant of L. capsulatus sp. n. 22 – habitat of L. capsulatus sp. n. at Aras Valley. 23 – capsule (trehala) of L. rudicollis. 24 – new generation adult of L. rudicollis emerging from capsule. 25 – capsule of L. hedenborgi dorsal view; 26 – ventral view of capsule.

FIGURES 15 – 20. Life stages of L. capsulatus sp. n. (Aras Valley, 2003). 15 – oviposition mark; 16 – eggs in petiole; 17 – larva in capsule (trehala); 18 – capsules on stem; 19 – pupa in capsule (trehala); 20 – newly emerged adult.