Porrhomma oblitum ( O. Pickard-Cambridge, 1871 )

Růžička, Vlastimil, 2018, A review of the spider genus Porrhomma (Araneae, Linyphiidae), Zootaxa 4481 (1), pp. 1-75 : 48

publication ID

https://doi.org/ 10.11646/zootaxa.4481.1.1

publication LSID

lsid:zoobank.org:pub:BFC4982D-BB84-4141-BDFD-203F23CD1585

DOI

https://doi.org/10.5281/zenodo.5963998

persistent identifier

https://treatment.plazi.org/id/03C6A93B-FFF9-FFFA-FF7C-FDC582713E4D

treatment provided by

Plazi

scientific name

Porrhomma oblitum ( O. Pickard-Cambridge, 1871 )
status

 

Porrhomma oblitum ( O. Pickard-Cambridge, 1871) View in CoL

Figs. 41A–F View FIGURE 41 .

Linyphia oblita O. Pickard-Cambridge, 1871 — O. Pickard-Cambridge (1871): p. 432 (descr. ♂); examined and transferred by Jackson (1913).

Neriene pallipes O. Pickard-Cambridge, 1871 View in CoL — O. Pickard-Cambridge (1871): p. 437 (descr. ♂); examined and synonymised by Jackson (1913).

Porrhomma oblitum View in CoL — Jackson (1913): p. 39, Pl. II, Figs. 23 View FIGURE 23 , 33 View FIGURE 33 (♂ ♀); synonymy.

P. oblitum — Merrett (1994): p. 318, Figs. 5–6 View FIGURE 5 View FIGURE 6 (♀).

Material examined. CZECHIA: Lovosice, Lovoš Hill , 25 May –14 Jun 1980, 1 ♂; Lanžhot , Ranšpurk Reserve , 5 Jun 1996, 1 ♀; Sedlec , Lednické Rybníky Ponds Reserve , 16 Jul 1996, 1 ♀, leg. V. Růžička ( IECA). Šumava Mts. , Mrtvý Luh Reserve, 22 May 1980, 1 ♀, leg. A. Kůrka (CAK). Lanžhot, Soutok Reserve, 1996–1997, 5 Ƌ 5 ♀, leg. et coll. L. Kubcová . RUSSIA: Orenburskaya (= Orenburg) Area, Aytuar , 22 May 1997, leg. S.L. Esyunin, 4 Ƌ 6 ♀ ( PSU, No. 2840).

Diagnosis. Small species (CW <0.60 mm), Fe I–II without dorsal spines, AP has the form of a bird head, Sshaped ascending parts of copulatory ducts. It is closely similar to P. cambridgei , but it can be distinguished by pigmented body and normal eyes ( Fig. 41A View FIGURE 41 ).

Description. ♀ (from Lanžhot, Czechia, 1 Oct 1996). Carapace brown, 0.57 mm wide, eyes normal, PME– PME = 0.8 ( Fig. 41A View FIGURE 41 ). Abdomen gray. Fe without dorsal spines, Fe I with one prolateral spine. Ti I with one prolateral spine, Ti I–II with one retrolateral spine. Tm Mt I = 0.44, Mt I/CW = 0.72.

Ascending parts of the ducts are S-shaped. Spermathecae are formed behind the ascending part of the ducts. Long appendices can be seen on the epigynum ( Fig. 41C View FIGURE 41 ) and vulva ( Figs. 41D–F View FIGURE 41 ).

Ƌ (together with female). Embolus of middle length with a narrow velum. ARP has the form of a bird head ( Fig. 41B View FIGURE 41 ).

Variation. Ƌ ♀. Carapace 0.53–0.61 mm wide. Tm Mt I = 0.37–0.45, Mt I/CW = 0.68–0.79 (n = 14).

Ecology. The species lives in wet open and forest habitats and is abundant in litter and under tree bark in floodplain forests ( Kubcová & Schlaghamerský 2002).

Global distribution. Europe after Helsdingen (2017) and this article. See Fig. 42 View FIGURE 42 .

IECA

Biology Centre of the Academy of Sciences of the Czech Republic, Institute of Entomology

PSU

Portland State University, Vertebrate Biology Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Linyphiidae

Genus

Porrhomma

Loc

Porrhomma oblitum ( O. Pickard-Cambridge, 1871 )

Růžička, Vlastimil 2018
2018
Loc

Linyphia oblita

O. Pickard-Cambridge 1871
1871
Loc

Neriene pallipes

O. Pickard-Cambridge 1871
1871
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