Porrhomma microphthalmum ( O. Pickard-Cambridge, 1871 )

Růžička, Vlastimil, 2018, A review of the spider genus Porrhomma (Araneae, Linyphiidae), Zootaxa 4481 (1), pp. 1-75 : 37-39

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.5963990

persistent identifier

https://treatment.plazi.org/id/03C6A93B-FFF2-FFF3-FF7C-FAC287413DAD

treatment provided by

Plazi

scientific name

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

 

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

Figs. 31A–F View FIGURE 31 .

Linyphia microphthalma O. Pickard-Cambridge, 1871 — O. Pickard-Cambridge (1871): p. 434, Pl. 56, no. 25 (descr. ♂); transferred by Simon (1884); examined by F. O. Pickard-Cambridge (1894) and Jackson (1913).

L. decens O. Pickard-Cambridge, 1871 — O. Pickard-Cambridge (1871): p. 436, Pl. 56, no. 27 (descr. ♂); examined by F. O. Pickard-Cambridge (1894) and Jackson (1913); synonymised by F. O. Pickard-Cambridge (1895).

Linyphia View in CoL ? incerta O. Pickard-Cambridge, 1878 — O. Pickard-Cambridge (1878): p. 117, Pl. XI, Fig. 2 View FIGURE 2 (descr. ♀); examined by F. O. Pickard-Cambridge (1894) and Jackson (1913); synonymised by F. O. Pickard-Cambridge (1895).

Porrhomma microphthalma — Simon (1884): p. 372.

Opistoxys acuta Simon, 1884 — Simon (1884): p. 373, Figs. 148–149 (descr. ♂); examined and synonymised by Thaler (1975).

P. meadii F. O. Pickard-Cambridge, 1894 — F. O. Pickard-Cambridge (1894): p. 101, Pl. II, Fig. 2 View FIGURE 2 (descr. ♂ ♀); synonymised by F. O. Pickard-Cambridge (1895).

P. microphthalmum View in CoL — F. O. Pickard-Cambridge (1895): p. 36; synonymy.

P. microphthalmum — Jackson (1913): p. 41, Pl. II, Figs. 16 View FIGURE 16 , 26 View FIGURE 26 (♂ ♀); synonymy.

P. microphthalmum microphthalmum — Tretzel (1956): p. 54.

P. microphthalmum — Thaler (1975): p. 142, Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 ; synonymy.

P. microphthalmum — Růžička (2009): p. 1086, Figs. 3–4 View FIGURE 3 View FIGURE 4 , 7 View FIGURE 7 (♂).

Material examined. CZECHIA: Krkonoše Mts., Pec pod Sněžkou , Úpská Rašelina Peatbog , 18 Jun –4 Jul 1984, 1 Ƌ, leg. J. Vaněk. Skuteč-Borek, 22 Apr –4 Jun 2005, 14 Ƌ 11 ♀, leg. V. Laška & I . H. Tuf. Velký Osek, 16 Aug 1994, 2 Ƌ 1 ♀, leg. J. Zelený. Třeboň-Přeseka, 24 Jun –11 Jul 1977, 1 Ƌ, leg. V. Růžička. České Budějovice, 1 Apr – 2 Jun 2002, 18 Ƌ 18 ♀, leg. L. Šimek ( IECA). Drahanovice, 29 Aug 1991, 1 ♀, leg. J. Svatoň ( WSM) . KAZAKHSTAN: East Kazakhstan Area, Kalbinsky District, 60 km WNW of Ust’ -Kamenogorsk, env. of Dongaly , 4 Jun 1997, 1 ♀, leg. R. Dudko & V. Zinchenko ( ZMMU).

Diagnosis. Porrhomma microphthalmum can be distinguished from other species of the microphthalmum - group by fully developed eyes.

Description. ♀ (from České Budějovice, Czechia, 1 Apr–2 Jun 2002). Carapace greyish brown, 0 67 mm wide, eyes normal, PME–PME = 1.0 ( Fig. 31A View FIGURE 31 ). Abdomen brown-grey. Fe I–II with one dorsal spine, Fe I with one prolateral spine. Ti I with one prolateral spine, Ti I–II with one retrolateral spine. Tm Mt I = 0.33, Mt I/CW = 0.84.

Epigynum rather square in appearance, broad side loops of the copulatory ducts are seen as circular windows at sides of the pit ( Fig. 31C View FIGURE 31 ). Conspicuous fold is formed in the uppermost part of the vulva, short descending part of the ducts ends with a spermatheca ( Figs. 31D–F View FIGURE 31 ).

Ƌ (together with female). Embolus long with a broad velum containing a pigmented spot. AP relatively short, approximately twice as long as broad, and reaches maximally up to the end of the velum ( Fig. 31B View FIGURE 31 ). The free end of the embolus is approximately as long as the velum is wide ( Fig. 33A View FIGURE 33 ).

Variation. Ƌ ♀. Carapace 0.60–0.70 mm wide. Tm Mt I = 0.29–0.38, Mt I/CW = 0.83–1.00 (n = 41).

Comments. Bathyphantes charpentieri was removed from the synonymy of P. microphthalmum ; see P. convexum .

Ecology. A common spider of various open habitats—rock steppes, meadows, subalpine zones, also fields and various dumps in early successional stages ( Růžička & Hejkal 1997).

Global distribution. Europe after Helsdingen (2017) and Mikhailov (2013). Turkey after Danişman & Koşar (2013), Iran after Tanasevitch (2009), Kazakhstan after this article. Song et al. (1999) mentioned the rocord in China. See Fig. 32 View FIGURE 32 .

IECA

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

WSM

Western Australian Soil Microbiology culture collection, Murdoch. University

ZMMU

Zoological Museum, Moscow Lomonosov State University

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Linyphiidae

Genus

Porrhomma

Loc

Porrhomma microphthalmum ( O. Pickard-Cambridge, 1871 )

Růžička, Vlastimil 2018
2018
Loc

P. meadii

F. O. Pickard-Cambridge 1894
1894
Loc

Opistoxys acuta

Simon 1884
1884
Loc

incerta

O. Pickard-Cambridge 1878
1878
Loc

Linyphia microphthalma

O. Pickard-Cambridge 1871
1871
Loc

L. decens

O. Pickard-Cambridge 1871
1871
Loc

Linyphia

Latreille 1804
1804
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