Eustrongylosoma penevi Golovatch & Stoev, 2013

Golovatch, Sergei & Stoev, Pavel, 2013, The millipede family Paradoxosomatidae in the Philippines, with a description of Eustrongylosomapenevi sp. n., and notes on Anoplodesmusanthracinus Pocock, 1895, recorded in Malaysia and Sri Lanka for the first time (Diplopoda, Polydesmida), Biodiversity Data Journal 1, pp. 957-957 : 957

Rank: SpeciesType of treatment: New taxonextantHabitat: terrestrialRoot classification: 8

Eustrongylosoma penevi Golovatch & Stoev, 2013 sp. n.

Materials

Type status: Holotype Occurrence: recordedBy: P. Stoev & L. Penev; individualCount: 1; sex: male; Location: island: Luzon Island; country: Philippines; stateProvince: Mountain Province; verbatimLocality: Mt Polis Checkpoint on the road Banaue - Sagada; verbatimElevation: 1800-1900 m; locationRemarks: under stones and logs; verbatimLatitude: 16°57\'58"N; verbatimLongitude: 121°1\'37"E; Event: eventDate: 6 July 2012; Record Level: institutionCode: NMNHS

Type status: Paratype Occurrence: recordedBy: P. Stoev & L. Penev; individualCount: 4; sex: male; Location: island: Luzon Island; country: Philippines; stateProvince: Mountain Province; verbatimLocality: Mt Polis Checkpoint on the road Banaue - Sagada; verbatimElevation: 1800-1900 m; locationRemarks: under stones and logs; verbatimLatitude: 16°57\'58"N; verbatimLongitude: 121°1\'37"E; Event: eventDate: 6 July 2012; Record Level: institutionCode: NMNHS

Type status: Paratype Occurrence: recordedBy: P. Stoev & L. Penev; individualCount: 1; sex: female; Location: island: Luzon Island; country: Philippines; stateProvince: Mountain Province; verbatimLocality: Mt Polis Checkpoint on the road Banaue - Sagada; verbatimElevation: 1800-1900 m; locationRemarks: under stones and logs; verbatimLatitude: 16°57\'58"N; verbatimLongitude: 121°1\'37"E; Event: eventDate: 6 July 2012; Record Level: institutionCode: NMNHS

Type status: Paratype Occurrence: recordedBy: P. Stoev & L. Penev; individualCount: 1; lifeStage: juvenile; Location: island: Luzon Island; country: Philippines; stateProvince: Mountain Province; verbatimLocality: Mt Polis Checkpoint on the road Banaue - Sagada; verbatimElevation: 1800-1900 m; locationRemarks: under stones and logs; verbatimLatitude: 16°57\'58"N; verbatimLongitude: 121°1\'37"E; Event: eventDate: 6 July 2012; Record Level: institutionCode: NMNHS

Type status: Paratype Occurrence: recordedBy: P. Stoev & L. Penev; individualCount: 1; sex: male; Location: island: Luzon Island; country: Philippines; stateProvince: Mountain Province; verbatimLocality: Mt Polis Checkpoint on the road Banaue - Sagada; verbatimElevation: 1800-1900 m; locationRemarks: under stones and logs; verbatimLatitude: 16°57\'58"N; verbatimLongitude: 121°1\'37"E; Event: eventDate: 6 July 2012; Record Level: institutionCode: ZMUM

Description

Length 18-22 (♂) or 23 mm (♀), width of midbody pro- and metazona 1.1-1.3 and 1.5-1.7 mm (♂), or 1.9 and 2.1 mm (♀), respectively. Holotype ca 22 mm long, width of pro- and metazona 1.3 and 1.6 mm, respectively. Coloration black to light grey-brown (Fig. 1a). Pattern mostly cingulate due to a large light grey band on prozona dorsally in front of stricture extending down until level of paraterga (Fig. 1a, b). Legs light grey-brown. Antennae increasingly infuscate distad, from light brown to blackish (Fig. 1a).

Body submoniliform. Antennomeres 2 to 6 subequal in length, antennae rather short, reaching behind segment 3 (♂) or 2 (♀) when stretched dorsally. Tegument generally smooth and shining. In width, segments 2 and 3 <collum = 4 <5-17, thereafter body gently tapering towards telson. Paraterga (Fig. 1b, c, d) modestly developed, keel-shaped, set low (at about 1/3rd of metazonal height), thinner in poreless, thicker in pore-bearing, segments, slightly reaching behind tergal margin only in segments 2 and 17-19, mostly slightly pointed, delimited by a complete and deep sulcus only dorsally, ventral sulcus being incomplete, developed only in posterior quarter to 1/5th extent. Head densely setose on clypeus and frons, bare on vertex. Collum semilunar, bearing two transverse rows of 2+2 setae, one row along front margin, second row in the middle; lateral edges broadly rounded. Metaterga faintly rugulose, a little more clearly so in postsulcus halves, surface below paraterga microgranular in segments 2-7. Tergal setae rather long, about 1/5th of metatergal length, arranged in two rows of 2+2 in each, one in front of, second behind sulcus. Sulcus starting from segment 5, deep, almost reaching the bases of paraterga. Stricture between pro- and metazona finely and densely ribbed. Ozopores lying close to caudal end of paraterga in a shallow ovoid groove, lateral, only partly visible from above. Pleurosternal carinae poorly developed ridges visible only in segments 2-4. Seta at about midway of each paratergum mostly broken off. Axial line wanting. Epiproct (Fig. 2a) subtruncate, pre-apical lateral papillae small. Hypoproct (Fig. 2b) semi-circular. Sternal lobe between coxae 4 subtrapeziform, densely setose (Fig. 2c). Legs very long and slender, about 2.0 (♂) or 1.3 (♀) times as long as midbody height; ♂ tarsal brushes traceable until about legs of segment 15, thereafter thinning out.

Gonopods rather simple (Fig. 2d, e, f): coxite long, subcylindrical, bare; prefemoral portion small, about 1/3rd as long as femorite, the latter slender, ventral lobe somewhat better developed than dorsal one, apicolateral lobe (l) rounded, well developed, with a long transverse spine (s) at base. Solenophore subcircular, with a subterminal lobule.

Diagnosis

Most similar to Eustrongylosoma exiguum Hoffman, 1978, from Papua New Guinea, and Eustrongylosoma kuekenthali (Attems, 1897), from Borneo and Sulawesi, sharing the presence of a prominent distal spine on the gonopod femorite. Different from all congeners by the transverse orientation of the spine and noticeably long legs in the male ( Hoffman 1978, Golovatch 1997).

Etymology

Honours our good friend and colleague Lyubomir Penev, biologist and founder of the Biodiversity Data Journal and Pensoft Publishers. <br/>

Notes

The species is hitherto known only from its type locality, Mt Polis Checkpoint on the road Banaue - Sagada (Fig. 3), where it was found close to a human settlement, under wooden plates and logs (Fig. 4).