Antheromorpha harpaga (Attems, 1937)

Likhitrakarn, Natdanai, Golovatch, Sergei I. & Panha, Somsak, 2016, Review of the Southeast Asian millipede genus Antheromorpha Jeekel, 1968 (Diplopoda, Polydesmida, Paradoxosomatidae), ZooKeys 571, pp. 21-57 : 43-46

Taxon classification Animalia Polydesmida Paradoxosomatidae

Antheromorpha harpaga (Attems, 1937) Figs 19, 20, 21

Orthomorpha harpaga Attems, 1937: 77 (D).

Orthomorpha harpaga - Attems 1938: 211 (D).

" Orthomorpha " harpaga - Jeekel 1963: 269 (M).

Antheromorpha harpaga - Jeekel 1968: 57 (M).

Antheromorpha harpaga - Jeekel 1980: 85 (M); Golovatch 1983: 181 (M); Enghoff et al. 2004: 37 (M); Nguyen and Sierwald 2013: 1234 (M).

Lectotype

♂ of Orthomorpha harpaga (NHMW-3495), Vietnam, Khánh Hòa Province, 15 km southwest of Ngatrang, Souidau (= Cam Lam-Suoi Cat 1), 06.1933, leg. C. Dawydoff.

Paralectotype.

1 ♂ (NHMW-3495), same locality, together with lectotype.

The lectotype is designated here to ensure that the name-bearing specimem is a complete ♂.

Redescription.

Length 19-21 mm (♂), width of midbody pro- and metazonae 1.8-1.9 and 2.3-2.6 mm, respectively (vs 1.8 and 2-2.5 mm in width of pro- and metazonae, respectively, as given in the available descriptions ( Attems 1937, 1938)). Coloration in alcohol, after long-term preservation, uniformly brown with a pale yellowish median stripe (Fig. 19 A–F), paraterga and epiproct pale whitish yellow or pale brown; antennae, legs and sterna whitish to pale brown.

Clypeolabral region sparsely setose, epicranial suture distinct. Antennae short (Fig. 19A), clavate (antennomere 6 broadest), reaching anterior edge of body segment 3 when stretched dorsally. In width, head <collum <segment 3 = 4 <segment 2 <5-17, gently and gradually tapering thereafter. Collum with three transverse rows of setae: 4+4 in anterior, 3+3 in intermediate and 3+3 barely traceable insertion points in posterior row; caudal corner broadly rounded, slightly bordered and declined ventrally, not extending behind tergal margin (Fig. 19A, B).

Tegument smooth and finely shargreened, metaterga smooth and delicately rugulose; surface below paraterga finely microgranulate. Postcollum metaterga with two transverse rows of setae traceable at least as insertion points when setae broken off: 2+2 in anterior (pre-sulcus), 3+3 in posterior (post-sulcus) row. Tergal setae simple, slender, about 1/3 of metatergal length. Axial line barely visible, starting with collum. Paraterga very strongly developed (Fig. 19 A–G), slightly upturned, all lying below dorsum, set at about upper 1/3 of midbody height, anterior edge of paraterga broadly rounded, bordered and fused to callus; lateral edge of paraterga 2 with three small incisions, with two small incisions in anterior half on poreless segments, with only one incision near front 1/3 on pore-bearing ones; caudal corner of paraterga narrowly rounded, increasingly well pointed on paraterga 16-19; paraterga bent posteriad, extending behind tergal margin; posterior edge oblique. Calluses delimited by a sulcus only dorsally. Ozopores evident, lateral, lying in an ovoid groove at about 1/4 of metatergite’s length in front of caudal corner. Transverse sulcus usually distinct (Fig. 19A, C, F), complete on metaterga 5-18, incomplete on segment 19, wide, line-shaped, reaching bases of paraterga, evidently ribbed at bottom. Stricture between pro- and metazonae wide, shallow, clearly ribbed at bottom down to base of paraterga (Fig. 19 A–F). Pleurosternal carinae complete crests with a sharp caudal tooth on segments 2-4, bulged anteriorly and with a sharp caudal tooth on segments 5-7, thereafter only a small, sharp, caudal tooth on segments 8-11 (Fig. 19B, D, E). Epiproct (Fig. 19 E–G) large, subrectangular, flattened dorsoventrally, with two apical papillae remarkably curved caudoventrally, claw-shaped; tip subtruncate; pre-apical papillae small, but visible, lying rather close to tip. Hypoproct semi-circular, setiferous knobs at caudal edge well-separated.

Sterna sparsely setose, without modifications; a high, subcordiform, sternal lobe between ♂ coxae 4 (Fig. 19H, I). Legs moderately long and slender, midbody ones ca 1.2-1.4 times as long as body height, prefemora without modifications, ♂ tarsal brushes present until legs of segment 18.

Gonopods (Fig. 20) long and slender. Prefemoral part about 3 times shorter than femorite (= strongly setose) part. Femorite slender, evidently curved, postfemoral part demarcated by an oblique lateral sulcus; tip of solenophore (sph) clearly deeply bifid, with a very long, slender, pointed process (d); processes m and v very small tubercles.

Remarks.

This is the only species in this genus that has been reported from Vietnam ( Attems 1937). It differs from congeners in the gonopod solenophore being deeply bifid and showing a long and slender process d and a bidentate tip (Fig. 20C).