Dentatosoma zeraboseli

Antić, Dragan Ž. & Makarov, Slobodan E., 2016, The Caucasus as a major hotspot of biodiversity: Evidence from the millipede family Anthroleucosomatidae (Diplopoda, Chordeumatida), Zootaxa 4211 (1), pp. 1-205 : 107-112

Dentatosoma zeraboseli gen. et sp. nov.

Figs 87–90 , 91 C

Diagnosis. Differs from the other two species of the genus by the anterior gonopods which are ending up with a long, laterally and downward orientated horn.

Etymology. The new species is named after its type locality, Zeraboseli , a noun in apposition.

Material studied (total: 35 males, 95 females, 12 juveniles). Holotype. GEORGIA: male , Ajaria, Kintrish Nature Reserve , Zeraboseli , 450–600 m asl, 1–3 Jun. 1981, S. Golovatch & J. Martens leg. ( ZMUM ρ3337).

Paratypes (total: 29 males, 89 females, 12 juveniles). All from GEORGIA, Ajaria: 6 males, 6 females, 3 juveniles, same data as holotype ( ZMUM ρ3338) ; 3 males, 3 females, same data, except: Rhododendron thickets, 2 Jun. 1981 ( ZMUM ρ3339) ; 16 males, 76 females, 9 juveniles (ZMUM ρ3340), 4 males, 4 females (IZB), Zelenyi Mys, Batumi Botanical Garden, 20–150 m asl, 30 May–7 Jun. 1981, S. Golovatch & J. Martens.

Other material (total: 5 males, 6 females) . All from GEORGIA, Chokhatauri District, near Bakhmaro, 40 km SSE Nabeglavi: 2 males, 3 females, 600 m asl, Alnus forest along stream, 8 Jun. 1981, S. Golovatch & J. Martens ( ZMUM ρ3341) ; 3 males, 3 females, 1550–1700 m asl, Abies , Picea , Fagus forest, same date and collectors (IZB).

Type locality. GEORGIA : Ajaria, Kintrish Nature Reserve, Zeraboseli .

Description. Body with 30 segments (including telson) in adults.

MEASUREMENTS. Males 10.5–12.5 mm long, vertical diameter of the largest pleurotergite 0.9–1 mm. Females 13.5–16.5 mm long, vertical diameter of the largest pleurotergite 1.1–1.3 mm.

COLORATION ( Fig. 87 ). As in previous species.

HEAD. Flattened in males. Labrum with three medial teeth and 6+5 labral and 2+2 supralabral setae. Promentum triangular, without setae. Lingual plates with 6+5 setae, on each plate arranged in two irregular rows. Stipites with ca 18+18 setae. Antennae 1.55 mm long in holotype. Length of antennomeres (in mm): I (0.1), II (0.18), III (0.36), IV (0.17), V (0.39), VI (0.19), VII (0.14) and VIII (0.02). Length/breadth ratios of antennomeres I–VII: I (1), II (2), III (4), IV (2), V (3.5), VI (1.7) and VII (1.5). Antennomeres II, IV, V, VI and VII with one, three, one, four and one sensillum, respectively. Number of ocelli 21–25, arranged in 5–6 rows in males; 21–25 in 5–6 rows in female.

COLLUM. Narrower than head, with six macrochaetae. Anterior edge semi-circular, posterior margin gently concave.

BODY SEGMENTS ( Figs 87 , 88 ). Lateral keels or swellings completely absent, only first few segments with barely visible swellings. Limbus very characteristic, dentate. Some limbus denticles with one short seta. Macrochaetae medium-sized and trichoid. CIX (pleurotergite 15) = 1; MIX (pleurotergite 15) = 1; PIX (pleurotergite 15) = 0; MA (pleurotergite 15) = 180˚.

TELSON. Epiproct with a pair of spinnerets and 3+3 setae (1+1 paramedian, 2+2 marginal). Hypoproct with 1+1 apical setae. Paraprocts with 3+3 marginal setae.

WALKING LEGS. In both sexes, leg-pairs 1 and 2 with tarsal combs; prefemora with several long and robust setae; femora and postfemora with a group of several long and robust setae.

MALE SEXUAL CHARACTERS ( Fig. 91 C). Leg-pairs 3–7 only slightly enlarged; leg-pair 7 the most enlarged and with sabre-like tarsi. Leg-pairs 3–6 resembling normal walking legs. Leg-pair 10 with coxal glands, no other peculiarities. Leg-pair 11 with coxal glands and a well-developed, posterior, coxal horn.

ANTERIOR GONOPODS ( Figs 89 A–C, 90A–E). Simple. Sternal plate (sp) anteriorly with a medial, hairy, sternal sac (ss). Coxal processes (cp) completely divided, high, parallel, ending up with a long, laterally and downward orientated horn (h). Posteriorly, both coxal processes with a medial, longitudinal, denticulate lamella (lol) and a pair of coxal vesicles (cv) with a long triangular process (trp) in-between. Above this triangular process, a winglike structure (ws) present.

POSTERIOR GONOPODS ( Figs 89 D, 90F–H). Coxites (c) divided. Telopodites (t) present on posterior side, consisting of a pigmented membranous part with setae. Coxal processes (cp) simple, curved anteriorly, with a shallow notch apically. Coxal vesicles (cv) situated anteromesally.

Distribution. Georgia ( Fig. 170 , green circle).

Figures

FIGURE 87. Dentatosoma zeraboseli gen. et sp. nov., paratype male from Batumi Botanical Garden, Ajaria, Georgia, habitus. Scale line = 1 mm.

FIGURE 88. Dentatosoma zeraboseli gen. et sp. nov., male from near Bakhmaro, 40 km SSE Nabeglavi, Chokhatauri District, Georgia, pleurotergite 15. A. Posterior view. B. Lateral view. C. Prozonite, dorsal view. D. Limbus, dorsal view. E. Dorsal view.

FIGURE 89. Dentatosoma zeraboseli gen. et sp. nov., holotype male gonopods. A. Anterior gonopods, anterior view. B. Anterior gonopods, lateral view. C. Anterior gonopods, posterior view. D. Posterior gonopods, posterior view. c = coxite; h = horn; t = telopodite; cp = coxal process; cv = coxal vesicle; ss = sternal sac; ws = wing-like structure; lol = longitudinal lamella; trp = triangular process. Scale line = 0.3 mm.

FIGURE 90. Dentatosoma zeraboseli gen. et sp. nov., male from near Bakhmaro, 40 km SSE Nabeglavi, Chokhatauri District, Georgia, gonopods. A. Anterior gonopods, anterior view. B. Anterior gonopods, lateral view. C. Anterior gonopods, posterior view. D. Anterior gonopods, distolateral view. E. Detail, anterior view. F. Posterior gonopods, posterior view. G. Posterior gonopods, lateral view. H. Posterior gonopods, anterior view. c = coxite; h = horn; t = telopodite; cp = coxal process; cv = coxal vesicle; sp = sternal plate; ss = sternal sac; ws = wing-like structure; lol = longitudinal lamella; trp = triangular process.

FIGURE 91. Leg-pair 11., holotype males. A. Dentatosoma denticulatum gen. et sp. nov. B. Dentatosoma magnum gen. et sp. nov. C. Dentatosoma zeraboseli gen. et sp. nov. Scale lines = 0.2 mm.

FIGURE 170. Distribution of the Caucasian Anthroleucosomatidae: the Dentatosoma, the Herculina, the Ratcheuma and the Vegrandosoma complexes.