Luridiblatta graeca, Bohn, 2022

Bohn, Horst, 2022, Revision of the genus Luridiblatta (Blaberoidea, Ectobiidae, Ectobiinae), Zootaxa 5215 (1), pp. 1-72 : 21-22

10. Luridiblatta graeca , sp. nov.

Figs. 6D , 31A–L , 32A–G , 33H–J , 35F , 36D , 43

Diagnosis. From L. cyprica and L. beybienkoi distinguished mainly by two characters: the edge, a lateral continuation of the anterior border of the pit openening (ed in Fig. 33H–J ), and the massive and more or less club-shaped glandular tubules (tu in Figs. 31D , 32C , 33I,J ).

Etymology. The species name refers to the hitherto known distribution of the species restricted to the country Greece (Crete and continental Greece).

Material studied. Type material. Holotype, 1♂, CRETE, 3 km N Mirtos (15 km W Ierapetra), 50 m, 27.VIII.1978, leg. B. & H.Bohn (completely on two slides: Kr 23/2). (Coll. Bohn, ZSMC).

Additional material. — GREECE. Nom. Aetolia-Arkanania : 1♀, btw. Ag. Nikólaos & Vónitsa, 20 m, 4.IX.1982, leg. B. & H.Bohn (Gr 33) .— Nom. Chalkidiki: 33♂, 22♀, num. L, Sithoniá, 5 km N Sártí, 50 m, 19./ 28. VIII.1977 (slides: ♂, Gr 1/1,2,4–6; ♀, Gr 1/3,7–9). (Coll. Bohn, ZSMC).— CRETE. Nom. Hanion : 6♂, 38L, Elafonisi Bay (3 km S Hrisokalitissa), 5 m, 7.VIII.78, leg. B. & H.Bohn (slides: ♂, Kr 3/1,2) ; 10♂, 3♀, 1L, Kalami ( 7 km E Souda ), 0 m, 12.VIII.78, leg. B. & H.Bohn (slides: ♂, Kr 10/1,4,5; ♀, Kr 10/2,3) .— Nom. Irakliou: 5♂, 6♀, 3L, Koxari (25 km ESE Iraklio), 150 m, 18.VIII.78, leg. B. & H.Bohn (slides: ♂, Kr 15/1; ♀, Kr 15/2) ; 9♂, 2♀, 1L, Festos, 100 m, 30.VIII.78, leg. B. & H.Bohn (slides: ♂, Kr 25/1–3).— Nom. Lasithiou : 6♂, 1♀, 3L, Vai (7 km N Palekastro), 5 m, 24.VIII.78, leg. B. & H.Bohn (slides: ♂, Kr 20/1,2; L, Kr 20/3) ; 33♂, 50♀, 10 O, Mt. Vigla Zakrou , 2 km SW Zákros, 300 m, 24./ 25.VIII.78, leg. B. & H.Bohn (slides: ♂, Kr 21/1–6,8,9,17,18; ♀, Kr 21/7,19) ; 1♀, 5L, btw. Agia Fotia & Ferma ( 10 km E Ierapetra ), 5 km, 26.VIII.78, leg. B. & H.Bohn (Kr 22) ; 9♂, 13♀, 3L, same data as holotype (slides: ♂, Kr 23/1; ♀, Kr 23/3–5). (Coll. Bohn, ZSMC) .

Description. Size. Male. Crete: Length of pronotum 1.86–2.05 (mean 1.95) mm, length of tegmina 4.54–5.44 (mean 4.94) mm. (N = 12/12). Female. Crete and Greece: Length of pronotum (mean) 1.98 mm, length of tegmina (mean) 2.37 mm. (N = 3/10). T6: Distance between the anterior bristle stripes as % of tergite breadth: range 14.6– 24.7, mean 19.8. (N = 9).

Female tegmina. Apical border shallowly concave ( Figs. 31H , 32B ).

Male abdomen. Tergites. Fig. 31A–F. T 6 . Highly specialised as described under characters of the genus and the beybienkoi -group; in the main structures not differing from the other species of the group ( Fig. 6D ). Two alleged specialties visible in this figure, a membraneous transversal fold (fo) and a w-shaped dark line between the anterior bristle stripes (arrowhead) are occasionally also found in other species of the beybienkoi- group. The comparison with the other species ( Figs. 1D , 6B,C ) shows, however, that there are differences in the distance between the anterior bristle stripes; the distance is smallest in L. graeca (mean: 19.8% of the breadth of the tergite; L. beybienkoi 22.3%, L. quadrivittata 23.4 %, L. cyprica 25.7%). But since there is considerable overlap between the species (see corresponding values for each species under “ Size ”) these differences are of little value for species separation. T7. Pit. Anterior border (ab) of the pit opening laterally continuing into an narrow fold or edge (ed) converging with the gutter (gu) and approaching it closely near the lateral border of the tergite ( Figs. 31D , 33H–J ); pit size: up to size 5 ( Fig. 31D ); anterior pit wall (aw) with transparent windows (w), stabilising bracelet (s), window frame (wf), and transversal folds (tf, Fig. 32C–G ); posterior pit wall (pw) with a pair of bulges (bu), either shallowly bowlshaped ( Fig. 32F ), or, more often, with a strange rectangular appearance ( Fig. 33H–J ). Glandular pouches (gp) long, tubules (tu), short, more or less club-shaped, rather massive, in nearly every preparation well visible ( Figs. 31D , 33J ). Genital hook. Claw (cl) as in L. cyprica with a large crest (cr) having two antlerlike processes (an, Fig. 31K,L ).

Distribution. Crete and Nom. Chalchidiki and Aetolia-Akarnia of continental Greece

IV. Doubtful species

The fourth group of species assembles two possible new species, which due to the incompleteness of the knowledge of their characters cannot yet be established as new species.

Figures

FIGURE 1A–D. Structures of male T6 of Luridiblatta; overview pictures to show the differences between the three species groups of the genus: A: longitubulata-, B,C: trivittata-, D: beybienkoi-group. The figure shows an exemplary selection of species of the three groups; the remaining species are similaraly depicted on Figs. 5E,F and 6A–D.—Abbreviations: ab anterior border of the tergite; ad, pd anterior, posterior deepening; arrows point to the anterior bristle stripe; mi group of lightly coloured spots indicating the insertion of dorso-ventral muscles; tr transversal ridge, not present in C,D; pr, po pre-ridge, post-ridge area of tergite.—Identifications: A (Sp 45/2, holotype), B (Sz 7/4), C (Al 36/7, holotype), D (Is 23/1).

FIGURE 6A–D. Structures of male T6. Continuation of overview pictures of male T6, species: L. vesiculosa (longitubulata- group), with fully developed transversal ridge tr; L. cyprica, L. beybienkoi and L. graeca (beybienkoi-group), without transversal ridge, but with ad, pd anterior, posterior deepening; fo membraneous fold; arrowhead indicates w-shaped dark line.—Identifications: A (Ma 5/1), B (Cy 18/1, holotype), C (Ty 3/1), D (Kr 23/2, holotype).

FIGURE 31 A–L. Main structures of L. graeca.—A–F. Tergites. A: T1–4; B: T5; C: T6; D: T7, with ab anterior border of the pit opening, ed edge, gp glandular pouches, gu gutter, pi pit and tu tubules; E,F: T8, (F) in more detail, rough cuticular structures along the anterior border only far laterally (arrow).—G,H. Left tegmen of male (G) and female (H).—I,J. Hindwing lobe l with part of metanotum mt of male (I) and female (J).—K,L. Male genital hook, with shaft sh, its apical process ap, velum ve, claw cl with crest cr, the latter with two strong antlerlike processes an.—Enlargements: Same scale for A–E, and for G,H.—Identifications: A–G,K (Kr 23/2, holotype), H (Gr 1/8), I (Kr 20/2), J (Gr 1/7), L (Gr 1/6).

FIGURE 32 A–G. Structures of L. graeca.—A,B. Left male (A) and female (B) tegmen (anteriorly at the right, posterior border below), each bristle of the lightly coloured area between the dark longitudinal stripes inserted in the center of a dark spot (arrowheads).—C–G. Male structures of T7 in more detail. C: Overview with focus stacking throughout the whole object; D: center of tergite in superficial focusing, not deeper than the borders of the pit opening; E: deepest focusing, down to the bottom bo of the pit; F: focusing in medium depth, presenting structures of both pit walls; G: structures of the anterior pit wall aw in higher magnification.—Abbreviations: ab, pb anterior, posterior border of the pit opening; aw, pw anterior, posterior pit wall; bo bottom of the pit; bu bulge of the posterior pit wall; ed edge; gp glandular pouches; gu gutter; s stabilising bracelet; tf transversal folds; ts tergite surface; tu tubules; w transparent window; wf window frame.—Identifications: A (Kr 25/3), B (Gr 1/9), C–G (Kr 21/18).

FIGURE 33 A–J. Left side of male T7 in the species of the beybienkoi-group. In all species the lateral angles of the pit opening are drawn out to a rather narrow gutter gu almost reaching the lateral border of the tergite. In L. graeca the anterior border of the pit opening continues laterally into a narrow edge ed converging with the gutter and approaching it closely near the lateral border of the tergite.—Further abbreviations: ab, pb anterior, posterior border of the pit opening; aw, pw anterior, posterior pit wall; gp glandular pouch; tu glandular tubule.—Identifications: A (Is 11/1), B (Ty 3/1), C (Is 21/1), D (Ty 1/1), E (Cy xx/1), F (Cy 18/1, holotype), G (Cy 21/1), H (Gr 1/5), I (Kr 23/2, holotype), J (Kr 10/5).

FIGURE 35 A–I. Colouration of female tergites in Luridiblatta species.—A–C. Longitubulata-group (comparable colouration also in L. gibberosa).—D. Trivittata-group (colouration of the female of L. habbachii not kown).—E–H. Beybienkoi-group (similar colouration also in L. beybienkoi).—Abbreviations of the dark patches: m mesal, sm submesal, l lateral, sl sublateral, ts transversal stripe; arrows point to the mesal patch of T1 showing characteristic differences between the first two and the third species group.—Identifications: A (Sp 47/15), B (Ma 3/20), C (Ma 16/Y), D (Sa 21/17), E (Is 13/4), F (Gr 1/8), G (Cy 25/3), H (Cy 30/3), I (Bo 1302).

FIGURE 36 A–K. Characters of the genus Luridiblatta and its species groups.—A,B. Colouration of thoracal nota in halfgrown or older larvae of Luridiblatta. Meso- and metanotum in the species of the beybienkoi-group (B, L. beybienkoi) as compared to the other two species groups (A, L. trivittata) with two more dark patches (arrow).—C,D. Bristles on T5 in the species of the longitubulata- and trivittata- group (C, L. trivittata) mainly large and of spatular shape, with clavate tip, in the beybienkoi-group (D, L. graeca) small, with acute tip.—E,F. Female terminalia of L. vesiculosa, with genital sclerites, ventral view, posterior on top. Dorsal complex (E), with c cerci, pp paraprocts, v valves of ovipositor, bd, bv dorsal, ventral basivalvular sclerites; right (bd) much longer than left one, median part by (bv) covered. Ventral complex (F): laterosternal shelf ls, with relatively long arms a, right one apically damaged.—G,H. Male subgenital plate S9 (G), with genital sclerites (except the hook), dorsal view: anterior apodemes aa, endophallus apodeme ea, cleft sclerite cs, R3 sclerite, and stylus s; the latter in higher magnification (H), partly covered with tiny scales.—I–K. Male terminalia of L. fenestrata, with posterior border of the supraanal plate pt, cerci c.—Enlargements: Same scale for E,F and for I–K.—Identifications:A (It 34/7), B (Is 20/2), C (Sz 7/4), D (Kr 23/2, holotype), E,F (Ma 46/3), G,H (It 34/3), I,J,K (Ma 14/12,13,11).

FIGURE 43. Cladogram of the Luridiblatta species reconstructed via the states of five characters listed below. The crown species on the tree are well distinguished by autapomorphies; but since these cannot contribute to the analysis of the phylogeny they are not inserted on the tree.