Aposphragisma stannum 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 : 72

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.4434431
persistent identifier	https://treatment.plazi.org/id/094F426D-FFD1-FF9A-6FC9-F0B780A4F8C3
treatment provided by	Plazi
scientific name	Aposphragisma stannum Thoma
status	sp. nov.

Treatment

Aposphragisma stannum Thoma View in CoL , sp. nov.

( Fig. 48 View FIGURE 48 )

Type material. HOLOTYPE: male ( PBI_OON 00012551 ), Bukit Timah Nature Reserve ( SINGAPORE) [01°21′N 103°47′E; inf.], 19.XII.1968, forest litter, leg. Dennis H. Murphy, deposited at MHNG. GoogleMaps

Etymology. The species epithet is a noun in apposition meaning ‘tin’ in Latin. It refers to Bukit Timah, the type locality, which means ‘tin bearing hill’ in the Malay language.

Diagnosis. A. stannum sp. nov. does not belong to the stripe clade and thus shows a completely ornamented sternum. It can be distinguished from other species with a completely ornamented sternum by the combination of the following traits: carapace margin with pointed denticles, sluice restricted to posterior margin; cheliceral promargin distally with tooth-like projection; epigastric scutum dorsally with a widely oval subterminal ridge.

Description. Description based on 1 male.

MALE. With the characters of the genus except as noted. Body length 1.21 mm, carapace length 0.56 mm. Sclerotized parts uniformly coloured yellow-brown, close to colour 23A ‘cinnamon’; legs slightly paler than body, more yellowish. Habitus: Figs. 48 View FIGURE 48 A-C.

CEPHALOTHORAX. Carapace: surface of elevated portion of pars cephalica smooth, sides finely reticulate; posterolateral surface without spikes; carapace margin with sluice restricted to posterior margin, with pointed denticles; few non-marginal pars thoracica setae present, very scattered. Eyes: ALE well developed, PLE and PME tiny, all oval; posterior eye-row straight from above, procurved from front; ALE separated by less than their radius; ALE-PLE separated by less than ALE radius; PME separated by less than their radius; PLE-PME separated by less than PME radius. Sternum completely finely ornamented; single lobed elements hardly visible on stereomicroscope level, surface appears rather reticulate; posterior margin with broad single extension. Pleura: surface smooth, presence of pits could not be assessed on stereomicroscope level. Mouthparts: chelicerae promargin with row of flattened setae in combination with plumose setae, distally extending into a short inwards pointing tooth-like projection; anterior face of paturon in lateral view subbasally with slight indention.

ABDOMEN. Book lung covers large, elliptical to rather pear-shaped (sides slightly convex), about 3–4 times longer than wide. Epigastric scutum dorsally with widely oval subterminal ridge (sr) ( Fig. 48C View FIGURE 48 ). Postepigastric scutum long, semicircular, with long posteriorly directed lateral apodemes (lap) ( Fig. 48B View FIGURE 48 ).

GENITALIA. Epigastric region: Sperm pore situated between anterior and posterior spiracles. Palp: basal segments as well as bulb and cymbium slightly lighter in colour than rest of body; bulb rather stout, tapering apically ( Fig. 48D View FIGURE 48 ). Embolus (em) tip spatulate; embolic spine with pointed tip. Conductor (con) with slender tip ( Fig. 48D View FIGURE 48 ). Embolus-conductor-complex about half as long as bulb.

Distribution. Bukit Timah, SINGAPORE ( Fig. 49 View FIGURE 49 ).