Antheromorpha pumatensis, Nguyen & Nguyen & Le, 2018

Nguyen, Anh D., Nguyen, Son G. & Le, Son X., 2018, On the millipede genus Antheromorpha Jeekel, 1968 (Diplopoda: Polydesmida: Paradoxosomatidae) from Vietnam, with a description of a new species, Raffles Bulletin of Zoology 66, pp. 96-109 : 100-104

publication ID

https://doi.org/ 10.5281/zenodo.4503276

publication LSID

lsid:zoobank.org:pub:80BB1696-2664-4B8D-A5D7-F7225327A7E0

DOI

https://doi.org/10.5281/zenodo.4778602

persistent identifier

https://treatment.plazi.org/id/5512252B-8F12-FFB8-A4E4-FAA0FC49F895

treatment provided by

Carolina

scientific name

Antheromorpha pumatensis
status

sp. nov.

Antheromorpha pumatensis View in CoL , new species

( Figs. 6−9 View Fig View Fig View Fig View Fig , 10 View Fig )

Material examined. Holotype: 1 male (IEBR-461H) Nghe An Provinve, Pu Mat National Park, Khe Thoi (19°04′47.7″N; 104°38′13.7″E); forest, 4−10 April 2011, coll. Anh. D. Nguyen. GoogleMaps

Paratypes: 2 males, 4 females (IEBR-461P) same data as sample IEBR-461H ; 1 male, 2 females (IEBR-462), same locality, but Thac Chem (18°58′17.4″N; 104°48′02.9″E); forest, 4−10 April 2011, coll. Anh. D. Nguyen. GoogleMaps

Diagnosis. This species differs from its congeners by having: metaterga with a median yellowish brown stripe, paraterga pink, tip of gonopod strongly divided into two processes: one being spiniform, the other being a serrated lobe.

Etymology. Named after the locality where the type specimens were collected.

Description. Body length about 28.1−37.4 mm (male); 28−36.5 mm (female); width of midbody pro- and metazona 2.3−2.9 mm (male); 2.9−3.4 mm (female) and 3.5−4.1 mm (male); 3.7−4.5 mm (female); respectively. Holotype length ca. 28.1 mm, width of midbody pro- and metazona 2.3 mm and 3.5 mm, respectively.

Prozona and metaterga with a median broad pink stripe and two paramedian castaneous/blackish brown regions ( Figs. 6 View Fig , 7 View Fig ). Paraterga pink or red (both dorsal and ventral sides). Pleura, head, distal part of antennomere 6 and whole antennomere 7 blackish brown. Antennae, sterna, and legs light brown.

Head ( Fig. 7A− C View Fig ) slightly broader than collum; clypeolabral region sparsely setose. Frons weakly convex, divided into 2 parts by a distinct epicranial suture. Antennae ( Fig. 7B, C View Fig ) claviform, reaching metatergum 3 if stretched dorsally. Most antennomeres subequal in length except for the shortest antennomeres 1 & 7.

Collum ( Fig. 7A View Fig ) slightly narrower than body ring 2. Surface smooth and shining. Paratergum modestly developed, earshaped or subtriangular with broadly rounded anterior corner. Lateral side without setiferous incision.

Body ring ( Fig. 7A− F View Fig ) 3<4<2= 5−16 in width, thereafter gradually tapering towards telson. Prozona shining and smooth. Metaterga shining, almost smooth except lateroposterior area faintly rugose. Transverse sulcus incompletely present on metatergum 4; well present, thin, distinct on metaterga 5−19, but not reaching base of paraterga. Metaterga with traces of rows of 2+2 and 5+5 setae in front of and behind transverse sulcus, respectively. The second row located near posterior margin. Axial line thin, brown, present on all prozona and metaterga.

Pleura considerably rugose, with dense microgranules. Pleurosternal carinae present as a full crest with a small caudal tooth on body rings 2−4; reduced to a small caudal denticle on body rings 5−14 (male); on body rings 5−11 (female); and absent on subsequent body rings.

Paraterga ( Fig. 7A, B View Fig , D−G) well developed, sub-horizontal, set lower than metatergal surface; thin, like blunt blades, but thicker on pore−bearing body rings from lateral view. Paratergum 2 subsector-shaped, with anterior and posterior corners rounded. Paraterga 3−4 shorter than others; caudal corners weakly acute, but not pointed. Caudal corners of paraterga 5−15 strongly acute, pointed, but more protruding on paraterga 15−19. Paraterga 16−19 with a small hook at caudal corners. Calluses small, narrow in both poreless and pore-bearing paraterga, with two setiferous incisions at 1/3 and ½ length of paraterga laterally. Paraterga exceeding posterior contour on body rings 16−19 (female) and on body rings 13−19 (male). Ozopores located on a small depression at 2/3 of paratergal length laterally.

Legs ( Fig. 7E, G View Fig ) long and slender, about 1.1−1.3 (females) 1.3−1.6 (males) times as long as midbody height. Tarsal brushes present on legs 1−11, thinner on legs 12−15 (male); thereafter missing on subsequent legs. Prefemora not swollen. Femora without modifications.

Sterna sparsely setose, without modifications except for the fifth sternum with a median pair of separately, but contiguously elevated setiferous conical processes between coxae 4 ( Fig. 7L View Fig ). Epiproct ( Fig. 7K View Fig ) long, broadly truncated, dorsoventrally flattened, with two small lateroapical tubercles. Tip with four spinnerets. Hypoproct ( Fig. 7J View Fig ) subtriangular with two distolateral, well separated, setiferous knobs.

Gonopod ( Figs. 8 View Fig , 9 View Fig ) simple. Coxite cylindrical, shorter than femorite; distoventral part modestly setose. Prefemorite densely setose, about ½ times as long as femorite, set off from femorite by a transverse sulcus laterally. Femorite long, slender, not expanded distally, suberect, demarcated from postfemoral region by an oblique sulcus laterally, with evidence of weak torsion basally. Flagelliform solenomere almost sheathed by solenophore. Tip of gonopod strongly divided into two processes, one being lanceolate process (D); the other with serrated lobe (m) and a distal minute process (v).

Remarks. Like Anthromorpha paviei , the new species is not typical for the genus Antheromorpha . It seems to be an intermediate species between Orthomorpha and Antheromorpha . In comparison to other Antheromorpha species, A. pumatensis , new species is differentiated by the colour pattern (red or brownish red); large size, and more importantly by gonopod conformation. The gonopod of the new species is long, slender and erect; tip deeply bifid, but the process (d) shorter than in other species, and process (m) serrated apically with short tubercle (v).

The species is only known from its type locality in central Vietnam.

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