Aposphragisma rimba Thoma, 2014

THOMA, MARCO, KRANZ-BALTENSPERGER, YVONNE, KROPF, CHRISTIAN, GRABER, WERNER, NENTWIG, WOLFGANG & FRICK, HOLGER, 2014, The new Southeast Asian goblin spider genus Aposphragisma (Araneae, Oonopidae): diversity and phylogeny, Zootaxa 3798 (1), pp. 1-86 : 59-64

publication ID

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

publication LSID

lsid:zoobank.org:pub:CB8534BA-89CB-44A6-81E3-3A8927055C7A

DOI

https://doi.org/10.5281/zenodo.4431933

persistent identifier

https://treatment.plazi.org/id/094F426D-FFAC-FFE2-6FC9-F4EE86F8F849

treatment provided by

Plazi

scientific name

Aposphragisma rimba Thoma
status

sp. nov.

Aposphragisma rimba Thoma View in CoL , sp. nov.

( Figs. 38–41 View FIGURE 38 View FIGURE 39 View FIGURE 40 View FIGURE 41 )

Type material. HOLOTYPE: male ( PBI_OON 00031408 ), Sarawak ( MALAYSIA), Mulu N.P ., 100 km SEE of Miri, 200 m [04°00′N 114°49′E; prov.], 19.–24.VIII.2003 (Winkler extraction), leg. A. Schulz, deposited at MHNG GoogleMaps . PARATYPES: 2 males ( PBI_OON 00012526 ), collected together with holotype, deposited at NMBE View Materials GoogleMaps ; 1 female ( PBI_OON 00031406 ; abdomen used for examination of internal genitalia), collected together with holotype, deposited at MHNG GoogleMaps ; 4 males & 1 female ( PBI_OON 00031407 ), collected together with holotype, deposited at MHNG GoogleMaps .

Non-type material. 2 males ( PBI_OON 00031404 ; used for SEM), collected together with holotype, deposited at MHNG GoogleMaps ; 2 aberrant females ( PBI_OON0 0031405 ), collected together with holotype, deposited at MHNG GoogleMaps .

Etymology. The species epithet is a noun in apposition meaning ‘pristine forest’ or ‘jungle’ in the Malay language.

Diagnosis. A. rimba sp. nov. does not belong to the stripe clade and thus shows a completely ornamented sternum. It can be distinguished from congeners with a completely ornamented sternum by the combination of the following traits: entire carapace surface smooth ( Fig. 38D View FIGURE 38 ); carapace margin with blunt denticles, sluice reaching from posterior margin to level of coxa I ( Fig. 38D View FIGURE 38 ); epigastric scutum dorsally without a widely oval subterminal ridge ( Fig. 40C View FIGURE 40 ); booklung covers (bc) small ( Figs. 40 View FIGURE 40 C–E).

Description. Description based on 9 males and 4 females.

MALE. With the characters of the genus except as noted. Body length 1.18–1.45 mm (n=9), carapace length 0.59–0.66 mm (n=9). Sclerotized parts uniformly coloured orange-brown close to colour 36 ‘amber’; legs paler than body, yellowish. Males show several remarkable modifications compared to congeners. Habitus: Figs. 38 View FIGURE 38 A–C.

CEPHALOTHORAX. Carapace: entire surface smooth, pars thoracica with 3 pairs of pronounced narrow depressions along margin ( Fig. 38D View FIGURE 38 ); posterolateral surface without spikes; posterior edge of pars cephalica with slightly stronger modified hair bases, appearing as small denticles; carapace margin with narrow sluice reaching from posterior margin to level of coxa I, with blunt denticles ( Fig. 38D View FIGURE 38 ). Eyes: posterior eye-row straight from above, procurved from front; 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 completely coarsely ornamented ( Figs. 38 View FIGURE 38 E–G); infracoxal grooves (icg) at both ends with depressions (presence or absence of openings can not be verified on available SEM images) ( Fig. 39C View FIGURE 39 ); posterior margin with broad single extension, covered with blunt denticles ( Fig. 38F View FIGURE 38 ); setae darkish, appearing slightly plumose at SEM level ( Fig. 39C View FIGURE 39 ). Pleura (pl): surface smooth with cluster of openings (cpo) ( Figs. 39 View FIGURE 39 C–D). Mouthparts: chelicerae posterior margin of inner surface proximally modified to a ridge with median slit (sli), covering about 1/2 of margin length ( Fig. 39G View FIGURE 39 ); promargin with row of flattened setae (rfs) in combination with plumose setae ( Fig. 39G View FIGURE 39 ), distally extending into a long tooth-like projection (tlp) ( Figs. 38H View FIGURE 38 , 39G View FIGURE 39 ); anterior face with few thickened and darkish needle-like setae ( Figs. 38H View FIGURE 38 , 39A, G View FIGURE 39 ; cf female, fig. 39B); posterior face with two spatulate setae (sps), about as long as fang ( Fig. 39G View FIGURE 39 ). Labium longitudinally slightly compressed and not as long as in females ( Fig. 39E View FIGURE 39 ). Endites distally with brush of special wing-like setae (ws) on inner margin ( Fig. 39F View FIGURE 39 ), outer margin subdistally with a pair of remarkably modified, darkish and thick setae (ebs) which resemble the blossom of a bird of paradise flower ( Strelitziaceae : Strelitzia sp.; Fig. 39F View FIGURE 39 ): a rather long and flat distal part covered with little spines and filaments is subbasally attached in a 90 degree bend to an unmodified but rather thick basal part ( Figs. 39 View FIGURE 39 E–F).

ABDOMEN. Book lung covers (bc) small, ovoid ( Figs. 40C, E View FIGURE 40 ). Epigastric scutum dorsally without subterminal ridge ( Fig. 40C View FIGURE 40 ). Postepigastric scutum almost semicircular, with long posteriorly directed lateral apodemes (lap) ( Fig. 40A View FIGURE 40 ). Setae appearing slightly plumose at SEM level ( Fig. 40D View FIGURE 40 ).

GENITALIA. Epigastric region: sperm pore (sp) situated between anterior and posterior spiracles ( Fig. 40A, D View FIGURE 40 ). Palp: basal segments as well as bulb and cymbium lighter in colour than rest of body; bulb slender with a faint conical bulge (cb) posterior of embolus-conductor-complex (compared to congeners shifted towards prolateral surface; Figs. 41 View FIGURE 41 D–E). On stereo-microscope level embolus-conductor-complex pincer-like in lateral view, dark ( Figs. 41 View FIGURE 41 A–B). Embolus (em) basally broad, subbasally with an angular dent on ventral part (thus proximal part apearing rhomboid in lateral view), medially abruptly narrowed, without dorsal comb ( Fig. 41C View FIGURE 41 ); embolus (em) tip flattened, elongated spatulate, basally with hook ( Fig. 41C View FIGURE 41 ); conductor (con) slender, attached basally to ventral part of embolus ( Figs. 41C, E View FIGURE 41 ).

FEMALE. As in males except as noted. Body length 1.38–1.44 mm (n=3), carapace length 0.65–0.66 mm (n=4). Chelicerae anterior face with scattered needle-like (and not thickend) setae ( Fig. 39B View FIGURE 39 ). Labium elongated triangular, not compressed. Anterolateral margin of outer surface of endites subdistally with a pair of unmodified long, needle-like setae with tips bent inwards.

GENITALIA. Dorsal view ( Figs. 41 View FIGURE 41 F–G): area containing small circular structures laterally framed by short rectangular sclerites (apodemes, lap); receptaculum (re) small, elongated; a transverse sclerite (ts) lies anteriorly to the receptaculum, medially bearing a nail-like structure (na).

Intraspecific variation. Body size variable (see above); colour shows only very slight variation, one female pale; number of denticles on carapace margin variable. Two females (PBI_OON 00031405) show a pair of tubercles (tub) at the ventral base of the pedicel tube and faint ridges on book lung covers (bc) ( Fig. 40E View FIGURE 40 ).

Distribution. NE-Sarawak, MALAYSIA; all specimens collected at type locality ( Fig. 49 View FIGURE 49 ).

NMBE

Switzerland, Bern, Naturhistorische Museums

MHNG

Museum d'Histoire Naturelle

NMBE

Naturhistorisches Museum der Burgergemeinde Bern

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Oonopidae

Genus

Aposphragisma

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