Cithaeron praedonius

The compact eye arrangement may superficially resemble juvenile males of Kukulcania hibernalis (Southern House Spider) or young Loxosceles species (recluse spiders), requiring expert examination for reliable identification. Depressed posterior median eyes and pseudosegmented tarsi distinguish it from similar-looking gnaphosoid spiders. Specimen examination by an arachnologist is recommended for conclusive identification.

Small spiders with mature females averaging approximately 5 mm in body length, males approximately 3 mm. Body compact with a characteristic eye arrangement featuring depressed posterior median eyes. Coloration and detailed patterning not explicitly described in available sources.

Anthropogenic environments; synanthropic. In native range, occurs in human-associated habitats. In introduced range (Florida), found in residential structures including homes and patios. Creates temporary silken 'nests' for molting and rest, but does not construct permanent webs for prey capture.

Native: North Africa (Egypt, Libya, Gambia), Greece, Cyprus, Turkey, Middle East (Syria, Yemen), India, and Malaysia. Introduced: Brazil, Cuba, United States (Florida, first recorded 2011; subsequently documented in multiple counties), Mexico, Honduras, and Australia (Northern Territory).

Activity records in Florida span December through February, with observations continuing into warmer months. Specific seasonal patterns in native range not documented.

Active hunter of other spiders. In captivity, observed feeding on native cobweb weavers and juvenile Latrodectus geometricus (Brown Widow spiders). Specialized predation on spiders hypothesized but not confirmed as obligate.

Females produce flat, round egg sacs. Spiders of different ages observed in introduced populations, indicating established reproduction. Individuals construct silken nests for molting.

Nomadic, wandering hunter that does not build webs for prey capture. Dispenses with silk in daily life except for temporary molting/resting nests and egg sac construction. Rapid, active movement observed.

Predator, potentially specializing on other spiders. Impact on native spider communities in introduced range not quantified.

Accidental introduction to multiple continents via human commerce, likely through unregulated trade or shipping. Frequently mistaken for medically significant spiders (Loxosceles species), causing public concern. Not considered dangerously venomous to humans or pets. Documented reproduction in Florida residences indicates establishment potential.

• Kukulcania hibernalisJuvenile male Southern House Spiders share compact eye arrangement; distinguished by different eye depression pattern and web-building behavior in adults.
• Loxosceles speciesYoung recluse spiders superficially resemble C. praedonius in body shape and eye arrangement; distinguished by violin-shaped marking (in some species), different eye pattern (six eyes in three dyads), and medical significance.
• Cheiracanthium speciesYellow sac spiders share similar habitat use and wandering behavior; distinguished by different eye arrangement and active silk use for retreat construction.

Frequently mistaken for Brown Recluse spiders (Loxosceles) by the public due to superficial resemblance, causing unnecessary alarm. Despite being venomous (as are nearly all spiders), it is not considered medically significant to humans.

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Bug Eric: Spider Sunday: Foreign Spider Now in Florida
• First record of Cithaeron reimoseri (Araneae: Cithaeronidae) from the New World and first record of the family from southern Brazil