Dentatosoma denticulatum

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 : 98-102

publication ID

https://doi.org/10.11646/zootaxa.4211.1.1

publication LSID

lsid:zoobank.org:pub:6B86C6BA-6AFE-4AAD-870D-04794C138D47

DOI

https://doi.org/10.5281/zenodo.6074427

persistent identifier

https://treatment.plazi.org/id/03B7878C-FFB6-CD5B-FF4C-EAA2B3ACEC31

treatment provided by

Plazi

scientific name

Dentatosoma denticulatum
status

 

Dentatosoma denticulatum gen. et sp. nov.

Figs 79–82 View FIGURE 79 View FIGURE 80 View FIGURE 81 View FIGURE 82 , 91 View FIGURE 91 A

Diagnosis. Differs from the other two species of the genus by the presence of a few denticles at the end of the coxal processes of the anterior gonopods.

Etymology. An adjective; to emphasize the presence of a few denticles at the end of the coxal processes of the anterior gonopods.

Material studied (total: 6 males, 6 females, 29 juveniles). Holotype. GEORGIA: male , Ajaria, 8 km W of Shuakhevi , mixed deciduous forest on rocky slope, litter and under stones, 11 Oct. 1981, S. Golovatch leg. ( ZMUM ρ3320).

Paratypes (total: 5 males, 6 females, 29 juveniles). All from GEORGIA, Ajaria: 1 female, same data as holotype ( ZMUM ρ3321) ; 3 males, 3 females, 29 juveniles, Keda District, Magutseti , Platanus forest, litter, 9 Oct. 1981, S. Golovatch leg. ( ZMUM ρ3322) ; 2 males, 2 females, Khulo , 900 m, Quercus , Abies & Alnus forest, litter, 11 Oct. 1981, S. Golovatch leg. ( IZB).

Type locality. GEORGIA: Ajaria, 8 km W of Shuakhevi, mixed deciduous forest on rocky slope, litter and under stones.

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

MEASUREMENTS. Males 11–12 mm long, vertical diameter of the largest pleurotergite 0.9–1 mm. Females 12– 16 mm long, vertical diameter of the largest pleurotergite 1–1.3 mm.

COLORATION ( Fig. 79 View FIGURE 79 ). Prozonites with paler greyish, while metazonites with darker greyish paramedial stripes. Laterally greyish. Dorsomedially, dorsolaterally and ventrolaterally yellowish.

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 5+4 setae, on each plate arranged in one row. Stipites with ca 20+20 setae. Antennae 1.5 mm long in holotype. Length of antennomeres (in mm): I (0.08), II (0.16), III (0.36), IV (0.2), V (0.38), VI (0.16), VII (0.14) and VIII (0.02). Length/breadth ratios of antennomeres I–VII: I (1), II (2), III (4.5), IV (2.5), V (3), VI (1.5) and VII (1.5). Antennomeres II, IV, V, VI and VII with one, three, one, four and one sensillum, respectively. Number of ocelli 22–24, arranged in 6 rows in males; 23–27 in 6 rows in females.

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

BODY SEGMENTS ( Figs 79 View FIGURE 79 , 80 View FIGURE 80 ). 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 View FIGURE 91 A). 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 81 View FIGURE 81 A–C, 82A–C). Simple. Sternal plate (sp) anteriorly with a medial, hairy, sternal sac (ss). Coxal processes (cp) completely divided, high, parallel or orientated laterally, curved posteriorly, ending with a few subtriangular teeth (stt). Posteriorly, both coxal processes with a medial longitudinal lamella (lol), with a pair of coxal vesicles (cv) and a long triangular process (trp) in-between. Above triangular process, wing-like (ws) structure present.

POSTERIOR GONOPODS ( Figs 81 View FIGURE 81 D, 82D–F). Coxites (c) divided. Telopodites (t) present on posterior side, consisting of a pigmented membranous part. Coxal processes (cp) simple, curved anteriorly, with a shallow notch apically. Coxal vesicles (cv) situated anteromesally.

Distribution. Georgia ( Fig. 170 View FIGURE 170 , yellow circle).

ZMUM

Zoological Museum, University of Amoy