Tegenaria pagana

C. L. Koch, 1840

Rural Funnel-web Spider, House Funnel-web Spider

Tegenaria pagana is a small funnel-web spider in the Agelenidae, first described from Greece in 1840. It is a strongly associated with human habitations, earning it the 'house funnel-web spider.' The species is native to the Palearctic region from Europe through North Africa to Central Asia, but has been introduced globally and is now established on multiple continents. A 2013 taxonomic revision substantially reduced its synonymy, consolidating several previously recognized species. It has been studied as a comparative model for development and troglomorphic evolution in cave-dwelling spiders.

Pronunciation

How to pronounce Tegenaria pagana: /ˌtɛdʒɪˈnɛəriə ˈpæɡənə/

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Identification

Distinguished from the closely related Tegenaria domestica by structure: T. pagana has spinnerets nearly twice as long as those of T. domestica, entirely white with a black ring at the end of the second segment of the upper two spinnerets. The terminal segment of the spinnerets is noticeably shorter than in T. domestica and somewhat concealed.

Appearance

Small funnel-web spider with females measuring 4.0–4.5 mm in body length, males 3.5–3.75 mm. Females have a pale yellowish with a reddish region marked by two longitudinal brown stripes and a marginal brown stripe. The opisthosoma is yellowish-white with rows of spots and transverse rows of smaller dash-like black markings on the sides. are long with a black ring on the segment. Males are similar in general appearance but have proportionally longer legs. The possesses functional .

Habitat

commonly associated with human habitations and urban environments. Constructs webs in and around houses, often building between rubble around buildings in built-up areas. As a troglophile, it can complete its in caves as well as in epigean (surface) .

Distribution

Native to the Palearctic region from Europe through North Africa to Central Asia. Introduced and established in the United States, Mexico, Brazil, Chile, Saint Helena, and South Africa. In South Africa, currently known only from the Western Cape province (Cape Town, Oudtshoorn, Worcester, Kirstenbosch National Garden).

Life Cycle

Complete embryonic development from to hatching documented in 14 stages. Spherical measure 500–600 µm in diameter. Key developmental stages include: early cleavages (0–10 hours after egg laying), formation (11–30 hAEL), blastopore formation (31–49 hAEL), primary thickening (50–72 hAEL), cumulus at 100–110 degrees (73–106 hAEL), field formation (107–114 hAEL), germ band appearance (115–118 hAEL), and prosomal limb bud development (119–150 hAEL).

Ecological Role

in both surface and cave . Serves as an important comparative model for understanding reduction and troglomorphic evolution in cave-dwelling spiders.

Human Relevance

Frequently encountered in human dwellings due to its habits. Protected within Kirstenbosch National Garden in South Africa. In South Africa, classified as Least Concern due to its wide global distribution despite limited local range.

Similar Taxa

Tegenaria domesticaSimilar general appearance and shared preference in human structures; distinguished by length and coloration pattern—T. pagana has nearly twice as long spinnerets with a black ring on the segment, versus shorter spinnerets in T. domestica.

More Details

Taxonomic History

The was first described by Carl Ludwig Koch in 1840 from specimens collected in Greece. A major 2013 revision by Bolzern, Burckhardt & Hänggi synonymized numerous previously recognized species and , including T. cerrutii, T. marinae, T. baronii, and the subspecies T. pagana urbana.

Etymology

The specific epithet 'pagana' derives from Latin, meaning 'of the countryside' or 'rustic.'

Developmental Biology

Exhibits intralecithal cleavage (within the ), absence of a distinct germ disc, indistinct blastopore formation, and C-shaped germ band formation. Developmental differences from established spider models include variations in developmental rate, opisthosoma , , and brain development.