Porrhomma errans ( Blackwall, 1841 ), Blackwall, 1841

Růžička, Vlastimil, 2018, A review of the spider genus Porrhomma (Araneae, Linyphiidae), Zootaxa 4481 (1), pp. 1-75: 29-31

publication ID

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

publication LSID

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

persistent identifier

http://treatment.plazi.org/id/03C6A93B-FFCA-FFCB-FF7C-F8C2846B3E1D

treatment provided by

Plazi

scientific name

Porrhomma errans ( Blackwall, 1841 )
status

 

Porrhomma errans ( Blackwall, 1841)  

Figs. 23A –F View FIGURE 23 .

Neriene errans Blackwall, 1841   — Blackwall (1841): p. 643 (descr. ♂ ♀); examined by F. O. Pickard-Cambridge (1894); transferred by Simon (1884).

Porrhomma errans   — Simon (1884): p. 364, Fig. 138 (♂ ♀).

P. errans   — F. O. Pickard-Cambridge (1894): p. 100, Pl. II, Fig. 1 View FIGURE 1 (♂ ♀)   . Material examined. CZECHIA: Ivanovice na Hané, Chvalkovice na Hané, 1959–1960, 57 Ƌ 65 ♀   , leg. B. Novák. Libčeves-Mnichov, Oblík Hill, 1995–1997, 10 Ƌ, leg. A. Kůrka ( NMP). Chrast , 49.9040°N, 15.9514°E, 2 Apr –3 May 2001, 1 Ƌ, 3 May –7 Jun 2001, 1 Ƌ 1 ♀ GoogleMaps   , leg. J. Dolanský (CJD). Vilémovice , 49.3588°N, 16.7296°E, 10 Nov 2003, 1 ♀ GoogleMaps   , leg. J. Horáková (IECA). Lanžhot, Ranšpurk Reserve, 1994–1997, 11 Ƌ 3 ♀, leg. J. Chytil ( WSM). GERMANY: Weichering , 6 Sep 1982, 1 Ƌ   , leg. B. Baehr (CGA).

Diagnosis. Porrhomma errans   can be easily recognised from all the other species of the genus by metatarsi provided with dorsal spine.

Description. ♀ (from Chrast, Czechia, 3 May –7 Jun 2001). Carapace orange-brown, 0.72 mm wide, eyes normal, PME –PME = 1.2 ( Fig. 23A View FIGURE 23 ). 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. All Mt with one dorsal spine. Tm Mt I = 0.61, Mt I/CW = 0.89. Ascending parts of the ducts are S-shaped. Spermathecae are formed behind the ascending part of the ducts ( Fig. 23C –F View FIGURE 23 ).

Ƌ (together with female). Embolus of middle length with a narrow velum. AP has the form of a bird head ( Fig. 23B View FIGURE 23 ).

Variation. Ƌ ♀. Carapace 0.71–0.77 mm wide. Tm Mt I = 0.55–0.61, Mt I/CW = 0.82–0.90 (n = 10).

Ecology. Species of mainly open habitats. Occurs on grassland, soft-rock cliffs, rabbit-grazed grassland and arable land ( Harvey et al. 2002). Found in a beet field as well as on a typical rock steppe.

Global distribution. Europe after Helsdingen (2017), modified. The record in Belarus mentioned by Ivanov (2013) seems to be doubtful and the material is probably lost (Zhukovets in litt.). The occurrence in Romania is also not recently confirmed ( Weiss & Petrisor 1999). The record in northern Asia seems to be a misidentification ( Eskov & Marusik 1993). See Fig. 24 View FIGURE 24 .

NMP

Natal Museum

WSM

Western Australian Soil Microbiology culture collection, Murdoch. University

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Linyphiidae

Genus

Porrhomma

Loc

Porrhomma errans ( Blackwall, 1841 )

Růžička, Vlastimil 2018
2018
Loc

Neriene errans

Blackwall 1841
1841