Aposphragisma borgulai Thoma

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): 15-20

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http://doi.org/ 10.11646/zootaxa.3798.1.1

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scientific name

Aposphragisma borgulai Thoma

sp. nov.

Aposphragisma borgulai Thoma   , sp. nov.

( Figs. 5–8 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 )

Type material. HOLOTYPE: male (PBI_OON 00031400), Sumatra ( INDONESIA), Jambi W of Mt. Tujuh Lake, 1400 m [01°42′S 101°23′E; inf.], 14.XI.1989, leg. D. Agosti, D. Burckhardt & I. Löbl, deposited at MHNG GoogleMaps   . PARATYPES: 1 male (PBI_OON 00012111), collected together with holotype, deposited at MHNG GoogleMaps   ; 1 male (PBI_OON 00012126), Sumatra ( INDONESIA), West Sumatra Province, Palopo Nat. Res. , N of Bukittinggi, 900 m [0°18′20′′S 100°22′09′′E; inf.], 18.–20.XI.1989, leg. I. Löbl, D. Agosti & D. Burckhardt, deposited at MHNG GoogleMaps   ; 1 male & 1 female (PBI_OON 00012402), Sumatra ( INDONESIA), West Sumatra province, old secondary forest above Taman Hutan Raya Bung Hatta , near road Padang to Lubuksulasih, 1100 m [0°56′45′′S 100°32′37′′E; prov.], 29./ 30.V.2006, leg. P. Schwendinger, deposited at NMBE GoogleMaps   ; 1 female (PBI_OON 00012407), Sumatra ( INDONESIA), West Sumatra Province, old secondary forest above Harau Canyon , N of Payakumbuh, 750 m [0°05′46′′S 100°39′58′′E; prov.], 7.VI.2006, leg. P. Schwendinger, deposited at MHNG GoogleMaps   ; 1 female (PBI_OON 00012432; abdomen used for examination of internal genitalia), Sumatra ( INDONESIA), West Sumatra Province, Rimbo Panti Nature Reserve , c. 30 km N of Lubuksikaping, 300–400 m [0°20′46′′N 100°04′09′′E; prov.], 11./ 13.VI.2006, leg. P. Schwendinger, deposited at MHNG GoogleMaps   ; 1 female (PBI_OON 00012439), Sumatra ( INDONESIA), West Sumatra Province, Anai Valley , 6 km S of Padangpanjang, 500 m [0°28′38′′S 100°21′14′′E; prov.], 1.VI.2006, primary forest, leg. P. Schwendinger, deposited at MHNG GoogleMaps   .

Non-type material. 1 male (PBI_OON 00031401; used for SEM), collected together with paratypes (PBI_OON 00012402), deposited at NMBE   .

Etymology. The species epithet is dedicated to Adrian Borgula (*1959), a Swiss biologist and politician who had an important influence on the development of the first author’s natural history skills since they first met in August 1993.

Diagnosis. A. borgulai   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. 5D View FIGURE 5 ); carapace margin with blunt denticles, sluice (slu) restricted to posterior margin ( Figs. 5 View FIGURE 5 D–E); epigastric scutum in females posterolaterally with a row of longitudinal ridges (lr) ( Fig. 8F View FIGURE 8 ). It closely resembles A. baltenspergerae   (see there for differences).

Description. Description based on 5 males and 4 females.

MALE. With the characters of the genus except as noted. Body length 1.73–1.86 mm (n=4), carapace length 0.79–0.84 mm (n=4). Sclerotized parts uniformly coloured orange-brown, very close to colour 36 ‘amber’; legs slightly paler than body. Habitus: Figs. 5 View FIGURE 5 A–C.

CEPHALOTHORAX. Carapace: surface of elevated portion of pars cephalica smooth, sides strongly reticulate, partly interrupted by small smooth areas ( Fig. 5D View FIGURE 5 ); posterolateral surface without spikes; posterior edge of pars cephalica with slightly stronger modified hair bases, appearing as small denticles (pmh) ( Fig. 5D View FIGURE 5 ); carapace margin with sluice (slu) restricted to posterior margin, with blunt denticles (den) ( Fig. 6A View FIGURE 6 ). Eyes: posterior eye-row straight from above, procurved from front ( Figs. 5A, H View FIGURE 5 ); ALE largest, separated by their radius to diameter; ALEPLE 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 (sms) ( Figs. 5 View FIGURE 5 E–G, 6B); posterior margin with broad single extension, covered with blunt denticles ( Fig. 5F View FIGURE 5 ); setae appearing plumose at SEM level ( Fig. 6B View FIGURE 6 ). Pleura surface smooth with scattered pits. Mouthparts: chelicerae posterior margin of inner surface proximally modified to a ridge with faint median slit (sli), covering about 2/3 of margin length, distally ending in small pointed bulge ( Fig. 6C View FIGURE 6 ); promargin with a row of flattened setae (rfs) with serrated lateral margin in combination with plumose setae ( Fig. 6E View FIGURE 6 ), distally extending into a short inwards pointing tooth-like projection (tlp) ( Figs. 6 View FIGURE 6 C–D), base of tooth-like projection posteriorly with a large plumose seta (lps) (about as long as fang; Figs. 6 View FIGURE 6 D–E); anterior face of paturon in lateral view subbasally slightly indented. Endites distally with brush of special setae with broad and deeply fringed tips on inner margin, outer margin subdistally with a pair of rather long, plumose setae bent inwards.

ABDOMEN. Book lung covers (bc) large, elliptical to dumbbell or pear-shaped (i.e. sides concave), about 3 times longer than wide ( Fig. 7A View FIGURE 7 ). Epigastric scutum dorsally with a widely oval subterminal ridge (sr) ( Fig. 7A View FIGURE 7 ); scuto-pedicel region with slightly ‘swollen’ hair bases. Postepigastric scutum long, semicircular, with long posteriorly directed lateral apodemes (lap) ( Fig. 6G View FIGURE 6 ). Setae appearing slightly plumose at SEM level ( Fig. 6F View FIGURE 6 ).

GENITALIA. Epigastric region: sperm pore (sp) situated between anterior and posterior spiracles ( Fig. 6F View FIGURE 6 ). Palp: basal segments as well as bulb and cymbium lighter in colour than rest of body; bulb stout ( Figs. 8 View FIGURE 8 A–B). Embolus (em) medially with longitudinal ridges (lri) on prolateral surface ( Fig. 8D View FIGURE 8 ); embolus tip spatulate and twisted ( Figs. 8C, E View FIGURE 8 ); embolic spine (esp) with fringed tip ( Fig. 8E View FIGURE 8 ). Conductor (con) with broad tip, distally with lateral comb (on stereomicroscope level tip appears ‘snout’-like in lateral view; Fig. 8C View FIGURE 8 ). Embolus-conductor-complex about as long as bulb.

FEMALE. As in male except as noted. Body length 1.72–2.06 mm (n=4), carapace length 0.76–0.88 mm (n=4). Epigastric scutum posterolaterally with a row of longitudinal ridges (lr) ( Fig. 8F View FIGURE 8 ).

GENITALIA. Dorsal view ( Figs. 8 View FIGURE 8 F–G): receptaculum (re) oval, containing an oval sac-like structure (sa), laterally framed by long, posteriorly pointed sclerites (apodemes; lap); globular appendix (gap) lying dorsally of receptaculum about 1/3 as long as receptaculum; posterior part of receptaculum dorsally covered with papillae (pap); a transverse sclerite (tsc) lies anteriorly to the receptaculum and bears medially a nail-like structure (na).

Intraspecific variation. Body size variable (see above); colour shows very slight variation; one rather small female shows irregular posterior eye row; number of denticles on carapace margin variable (around 20 each side); one female with reduced smooth median stripe on sternum.

Distribution. W-Sumatra, INDONESIA ( Fig. 49 View FIGURE 49 ).


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Naturhistorisches Museum der Burgergemeinde Bern