Aposphragisma baltenspergerae Thoma, 2014

THOMA, MARCO, KRANZ-BALTENSPERGER, YVONNE, KROPF, CHRISTIAN, GRABER, WERNER, NENTWIG, WOLFGANG & FRICK, HOLGER, 2014, <strong> The new Southeast Asian goblin spider genus <em> Aposphragisma </ em> (Araneae, Oonopidae): diversity and phylogeny </ strong>, Zootaxa 3798 (1) : 9-15

Aposphragisma baltenspergerae Thoma , sp. nov.

( Figs. 1–4)

Type material. HOLOTYPE: male (PBI_OON 00031365), Kalimantan ( INDONESIA), Sepaku, 40 km NNW of Balikpapan [0°55′S 116°47′E; inf.], 2.VIII.1980, degraded primary forest, leg. C. Deeleman, deposited at RMNH . PARATYPES: 1 female (PBI_OON 00015856; abdomen used for examination of internal genitalia), Kalimantan ( INDONESIA), Sotek [01°12′S 116°35′E; inf.], 31.XII.1980, leg. J. Aoki & H. Harada, deposited at NMBE ; 1 female (PBI_OON 00015869), Kalimantan ( INDONESIA), 2 km E of Camp Pemantus, 43 km W of Sotek [01°12′S 116°12′E; inf.], 17.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT ; 1 male (PBI_OON 00015870), Kalimantan ( INDONESIA), 5 km W of Sotek [01°12′S 116°35′E; inf.], 29.XII.1980, leg. J. Aoki, deposited at MZT ; 1 male (PBI_OON 00015911), Kalimantan ( INDONESIA), Camp Pemantus , 45 km W of Sotek [01°12′S 116°12′E; inf.], 19.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT ; 1 female (PBI_OON 00015924), Kalimantan ( INDONESIA), 2 km E of Camp Pemantus, 43 km W of Sotek [01°12′S 116°12′E; inf.], 18.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT ; 1 male (PBI_OON 00015925), Kalimantan ( INDONESIA), Camp Pemantus , 45 km W of Sotek [01°12′S 116°12′E; inf.], 29.XII.1980, leg. H. Harada, deposited at NMBE ; 1 male (PBI_OON 00015966), Kalimantan ( INDONESIA), at the foot of Mt. Pemantus , 50 km W of Sotek [01°12′S 116°12′E; inf.], 24.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT ; 1 male (PBI_OON 00015967), Kalimantan ( INDONESIA), Camp Pemantus , 45 km W of Sotek [01°12′S 116°12′E; inf.], 26.XII.1980, leg. H. Harada, deposited at MZT ; 1 female (PBI_OON 00031362), Kalimantan ( INDONESIA), Tenggarong [0°22′S 116°59′E; inf.], 4.VIII.1980, lichtbos, strooisel, leg. C. Deeleman, deposited at RMNH ; 1 female (PBI_OON 00031376), Kalimantan ( INDONESIA), Samboga , 40 km N of Balikpapan [0°55′S 116°52′E; inf.], 6.VIII.1980, leg. C. Deeleman, deposited at RMNH ; 2 males (PBI_OON 00031399), Kalimantan ( INDONESIA), 1 km E of Sotek [01°12′S 116°35′E; inf.], 31.XII.1980, leg. J. Aoki & H. Harada, deposited at MZT ; 2 females (PBI_OON 00031475), Kalimantan ( INDONESIA), Samarinda distr. , Sanga Sanga Muara [0°35′S 117°15′E; inf.], 29.X.1979, jungle litter, leg. P. T. Lehtinen, deposited at MZT .

Non-type material. 1 male (PBI_OON 00015855; partly used for SEM), collected together with paratypes (PBI_OON 00031399), deposited at NMBE .

Etymology. The species epithet is dedicated to Yvonne Kranz-Baltensperger (*1966), a NMBE arachnologist and PBI participant, mainly working on the revisions of the oonopid genera Ischnothyreus and Xyphinus .

Diagnosis. A. baltenspergerae sp. nov. belongs to the stripe-clade and can be distinguished from other species of this clade by the combination of the following traits: carapace without spikes ( Fig. 1G); carapace margin with blunt denticles, sluice (slu) restricted to posterior margin ( Fig. 1D); epigastric scutum in females posterolaterally with a row of longitudinal ridges (lr) ( Fig. 4G). The new species closely resembles A. borgulai sp. nov. but shows a less pronounced sternum ornamentation ( Fig. 1F), a different surface structure of the sternum setae (much less plumose, surface almost smooth; Fig. 2A) and more openings on the pleura (pl) surface ( Fig. 2B); in males conical bulge (cb) on bulb less pronounced, cymbium anteriorly rounded in dorsal view, embolus subdistally without bend, embolic spine (esp) with pointed tip ( Figs. 4 D–E); in females postepigastric lateral apodemes (lap) shorter, internal genitalia slightly different e.g. showing different distribution of papillae (pa) ( Figs. 4 F–G); also differs in body size without overlap and has a disjunct distribution ( Fig. 49).

Description. Description based on 9 males and 7 females.

MALE. With the characters of the genus except as noted. Body length 1.47–1.61 mm (n=8), carapace length 0.68–0.73 mm (n=8). Sclerotized parts uniformly coloured orange-brown, approaching colour 340 ‘Robin Rufous’; legs slightly paler than body. Habitus: Figs. 1 A–C.

CEPHALOTHORAX. Carapace: surface of elevated portion of pars cephalica smooth, sides strongly reticulate partly interrupted by small smooth areas ( Figs. 1D, G); posterolateral surface without spikes; posterior edge of pars cephalica with slightly stronger modified hair bases (pmh), appearing as small pointed denticles ( Fig. 1G); nonmarginal pars thoracica setae present; carapace margin with sluice (slu) restricted to posterior margin, with blunt denticles ( Figs. 1 D–E, 2B). Eyes: posterior eye-row straight from above, procurved from front ( Figs. 1D, H); ALE largest, separated by their radius to diameter; ALE-PLE separated by less than ALE radius; PME touching throughout most of their length; PLE-PME separated by less than PME radius. Sternum coarsely ornamented except smooth median stripe ( Figs. 1 E–F); surface setae only slightly plumose (surface almost smooth; Fig. 2A); infracoxal grooves (icg) anteriorly and posteriorly with openings ( Fig. 2B); posterior margin with broad single extension, covered with blunt denticles ( Fig. 1F). Pleura (pl) surface smooth with scattered pits ( Fig. 2B). Mouthparts: chelicerae posterior margin of inner surface along proximal half upfolded to a ridge with median slit (sli) ( Fig. 2C); promargin with row of flattened setae (rfs) in combination with plumose setae, distally extending into a short inwards pointing tooth-like projection (tlp) ( Figs. 1F, 2C); posterior face medially densely ribbed, with a pair of long spatulate setae (sps) ( Fig. 2C). Endites: inner margin distally with brush of special wing-like setae (ws) with broad and deeply fringed tips ( Fig. 2D), outer margin subdistally with a pair of rather long plumose setae bent inwards (ebs) ( Fig. 2D).

ABDOMEN. Book lung covers (bc) large, elliptical to dumbbell or pear-shaped (i.e. sides concave), about 3 times longer than wide ( Fig. 2G); book lung cover margins slightly elevated ( Fig. 2H). Epigastric scutum dorsally with a widely oval subterminal ridge (sr) ( Fig. 2G); scuto-pedicel region with slightly swollen hair bases ( Fig. 2H). Postepigastric scutum long, semicircular, with long posteriorly directed lateral apodemes (lap) ( Fig. 2E). Setae appearing slightly plumose at SEM level ( Fig. 2H).

GENITALIA. Epigastric region: sperm pore (sp) situated at level of posterior spiracles ( Fig. 2E). Palp: basal segments as well as bulb and cymbium lighter in colour than rest of body; bulb stout ( Figs. 4 A–B). Embolus (em) medially with longitudinal ridges (lri) on prolateral surface ( Fig. 4D), tip widened and spatulate ( Fig. 4E); embolic spine with pointed tip (esp) ( Fig. 4E). Conductor (con) with broad tip (on stereomicroscope level tip appears ‘snout’-like in lateral view; Figs. 4C, E). Embolus-conductor-complex about as long as bulb ( Figs. 4 A–B).

FEMALE. As in male except as noted. Body length 1.46–1.77 mm (n=6), carapace length 0.67–0.77 mm (n=6). Book lung covers about 4–5 times as long as wide. Epigastric scutum posterolaterally with a row of longitudinal ridges (lr) ( Figs. 4 F–G). Postepigastric scutum with short posteriorly directed lateral apodemes (lap) ( Figs. 2F, 4 F–G).

GENITALIA. Dorsal view ( Figs. 4 F–G): receptaculum (re) large, oval, containing an oval sac-like structure (sa), lateral and median part dorsally covered with papillae (pap), laterally framed by elongated, posteriorly pointed sclerites (apodemes, lap); globular appendix (gap) lying dorsally of receptaculum about 1/5 as long as receptaculum; a transverse sclerite (tsc) lies anteriorly to the receptaculum and bears medially a nail-like structure (na).

Intraspecific variation. Body size variable (see above); the following characters show slight variation: body colour, number of denticles on carapace margin and extension of smooth median stripe on sternum. One female (PBI_OON 00031362) large (body length 1.79 mm, carapace length 0.81 mm; not included in size measurements above), in dorsal view with rather broad carapace and posterior edge of pars cephalica with a pair of large blunt denticles.

Distribution. E-Kalimantan, INDONESIA ( Fig. 49).