Kronopolites lunatus, Likhitrakarn, Natdanai, Golovatch, Sergei I. & Panha, Somsak, 2015

Likhitrakarn, Natdanai, Golovatch, Sergei I. & Panha, Somsak, 2015, Review of the millipede genus Kronopolites Attems, 1914 (Diplopoda, Polydesmida, Paradoxosomatidae), with the description of a new species from Laos, ZooKeys 472, pp. 27-41 : 30-32

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scientific name

Kronopolites lunatus

sp. n.

Taxon classification Animalia Polydesmida Paradoxosomatidae

Kronopolites lunatus View in CoL sp. n. Figs 1, 2, 3


♂, Laos, Xieng Khouang Province, Phookood District, Cave Pra, ca 1180 m a.s.l., 19°30'02"N, 102°52'20"E, 02.07.2014, leg. R. Srisonchai.


1 ♂, Laos, Luang Prabang Province, Chomphet District, Kacham Waterfall, ca 440 m a.s.l., 19°38'57"N, 102°04'52"E, 01.07.2014, leg. C. Sutcharit.


To emphasize the lateral crescent-shaped processes on the gonopod.


Superficially very similar to Kronopolites acuminatus , but differs in the smaller size, the width of midbody pro- and metazonae being 2.4-2.5 and 3.1-3.2 mm, respectively (versus 4.5 mm and 6.5 mm, respectively); tarsal brushes are present until ♂ leg 9 (versus absent), and gonopod process b is> 2 times as long as process a (versus shorter), process a being clearly curved (versus nearly straight) while process b is enlarged and lies adjacent to the femorite (versus clearly separated from the femorite). Eventually, it keys out closest to Kronopolites formosanus (see Key below).


Length 28.4-29.5 (♂), width of midbody pro- and metazonae 2.4-2.5 and 3.1-3.2 mm (♂), respectively.

Live coloration mostly dark, blackish brown; antennae and head dark brown to light brown, venter and a few basal podomeres light brown to yellow-brown; coloration of alcohol material after four months of preservation faded to dark brown; antennae and epiproct light brown to light yellow, venter and a few basal podomeres light brown to pallid (Fig. 1 A–I).

Clypeolabral region and vertex densely setose, epicranial suture distinct. Antennae moderately long (Fig. 1A), extending behind body segment 3 (♂) when stretched dorsally. In width, segment 4 <3 <head <5 <collum <segment 2 <6-17 (♂); thereafter body gently and gradually tapering. Collum with three transverse rows of setae: 4+4 anterior, 3+3 intermediate and 4+4 posterior; lateral incisions absent; caudal corner of paraterga very broadly rounded, declined ventrad, produced behind rear tergal margin (Fig. 1A, B).

Tegument smooth and shining, prozonae finely shagreened, metaterga finely rugulose (Fig. 1A, C, F); surface below paraterga finely microgranulate (Fig. 1B, D, E). Postcollum metaterga with two transverse rows of setae: 3+3 in anterior (pre- sulcus) and 3+3 in posterior (post-sulcus) row, traceable as insertion points. Tergal setae long and slender, mostly abraded, about 1/3 as long as metaterga. Axial line barely traceable both on pro- and metazonae. Paraterga strongly developed (Fig. 1 A–F), lying rather high (at upper 1/3 of body), slightly upturned, but lying below dorsum; anterior edge broadly rounded and narrowly bordered, fused to callus; caudal corner very narrowly rounded, starting from segment 15 extending increasingly well beyond rear tergal margin (Fig. 1E, F); lateral edge without incisions (Fig. 1A, C, F); posterior edge nearly straight. Calluses on paraterga narrow, delimited by a sulcus both dorsally and ventrally. Ozopores evident, lateral, lying in an ovoid groove at about 1/4 in front of posterior edge of metaterga. Transverse sulcus usually distinct (Fig. 1A, C, F), slightly incomplete on segment 19, complete on metaterga 3-18 (♂), narrow, line-shaped, shallow, reaching bases of paraterga, faintly ribbed at bottom. Stricture between pro- and metazonae evident, broad and deep, ribbed at bottom down to base of paraterga (Fig. 1 A–F). Pleurosternal carinae complete crests with a sharp caudal tooth on segments 2-7, thereafter increasingly strongly reduced until segment 17 (♂). Epiproct (Fig. 1 E–G) conical, flattened dorsoventrally, with two small apical papillae; tip subtruncate; pre-apical papillae small, lying close to tip. Hypoproct roundly subtriangular, setiferous knobs at caudal edge small and well-separated (Fig. 1G).

Sterna densely setose, without modifications, but with two small, rounded, fully separated, setose cones between ♂ coxae 4 (Fig. 1H, I). Legs rather long and slender, midbody ones ca 1.2-1.3 (♂) as long as body height (Fig. 1A, B, F, G); prefemora without modifications, tarsal brushes present until ♂ leg 9.

Gonopods (Figs 2, 3) rather complex; coxa a little curved caudad, sparsely setose distoventrally. Prefemur densely setose, about 1/3 as long as femorite + postfemoral part. Femorite rather stout, with an evident mesal groove and a strong distolateral sulcus demarcating a postfemoral part; the latter well-developed, with very prominent, bipartite, crescent-shape, lateral processes: process a rather short, coiled and pointed; process b long and coiled, also pointed; solenophore clearly curved, long, expanded distomesally, trifid, lamina medialis supporting a long flagelliform solenomere.


This is the first Kronopolites to be found in Laos.