Cicurina

Menge, 1871

cave meshweaver

Cicurina is a of small commonly known as cave meshweavers, first described by Anton Menge in 1871. The genus has undergone multiple reassignments, most recently placed in the family Cicurinidae in 2023. exhibit considerable size variation, with some measuring under 2 mm and others exceeding 13 mm. Many species are specialized cave dwellers (troglobites), including several federally in the United States.

Pronunciation

How to pronounce Cicurina: //sɪkjʊˈriːnə//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from similar by the combination of small size, reduction or absence in cave-dwelling , and detailed examination of female structure. The was historically confused with funnel weavers and dictynids, but molecular and morphological studies have clarified its placement in Cicurinidae. Intraspecific variability in genital has complicated species-level identification, necessitating examination of for reliable determination.

Habitat

varies by : many are troglobitic (obligate cave-dwellers), while others inhabit surface environments including forests. The subnivium (air pocket beneath winter snowpack) serves as habitat for some species such as C. brevis. Cave-dwelling species occupy dark, humid, nutrient-poor subterranean environments. Surface-dwelling species have been collected from national forest parks and nature reserves.

Distribution

North America (primarily central Texas cave systems, with records from Vermont and other states), Europe (Denmark, Norway, Sweden), and Asia (China: Guangdong, Chongqing; additional records from Asia).

Seasonality

Activity patterns vary by . Subnivium-dwelling such as C. brevis are active in winter beneath snowpack and appear rare or inactive during summer months. Cave-dwelling species likely active year-round in stable subterranean environments.

Life Cycle

troglobitic individuals are rare; most troglobitic originally described from only one or two females, suggesting either low adult abundance or difficulty in mature specimens. Males of some species remain undescribed or were described only recently.

Behavior

Subnivium have been observed to be active exclusively in the winter subnivium environment, possibly entering dormancy during summer months. Cave-dwelling species are sedentary within their subterranean .

Ecological Role

in subnivium and cave . Cave-dwelling occupy nutrient-poor where they may on other small . Cicurina madla serves as an for cave ecosystem health in central Texas, where its survival is linked to cave that transport nutrients into caves.

Human Relevance

Four (including C. madla and C. bandida) are listed as federally endangered in the United States, making the significant for efforts. status has generated conflict between development interests and conservation goals in Texas. () threaten cave by preying on cave , indirectly endangering Cicurina species. Taxonomic revisions of the genus have direct implications for environmental policy and species protection.

Similar Taxa

DictynaHistorically placed in same (Dictynidae); distinguished by different genital and non-troglobitic habits in most
HahniaPreviously classified together in Hahniidae; Cicurina separated based on molecular and morphological evidence into distinct Cicurinidae
Tegenaria/Eratigena (funnel weavers)Originally placed with funnel weavers; Cicurina differs in smaller size, different arrangement, and web structure

Misconceptions

The has been subject to taxonomic instability, with descriptions based on minimal specimens leading to potential over-splitting. Some species previously considered distinct have been synonymized upon examination of larger series (e.g., C. cueva and C. reyesi synonymized with C. bandida).

More Details

Taxonomic instability

The has been moved between multiple times: originally placed with funnel weavers, then Dictynidae (1967), then Hahniidae (2017), and finally Cicurinidae (2023). This reflects ongoing revision of .

Conservation significance

The particular status of troglobitic Cicurina makes reliable essential for cave management. The dynamic nature of taxonomic science conflicts with static conservation frameworks, creating challenges for environmental policy.

Intraspecific variability

Recent studies have documented substantial intraspecific morphological variability, particularly in female , necessitating reassessment of many originally described from single specimens.