Phidippus clarus

Distinguished from the similar Phidippus apacheanus by black cephalothorax with bright abdominal markings (P. apacheanus has more uniform intense red coloration). From P. cardinalis by color intensity—P. clarus lacks the orange tones and lighter bristles of P. cardinalis, and P. cardinalis often shows abdominal markings (light line around anterior abdomen, possible dorsal spots) absent in P. clarus. Larger than many sympatric salticids; substantial size difference between sexes aids identification.

A relatively large salticid with sexual dimorphism in size. Female carapace averages 4.05 mm wide; male carapace averages 3.20 mm wide. Coloration typically red-brown to lighter yellow-brown with darker body markings. Distinguished from similar Phidippus species by black cephalothorax with bright abdominal markings (in contrast to P. apacheanus, which has more uniform red coloration).

Old fields and open vegetation throughout eastern North America. Frequently occupies upper portions of plants, including agricultural crops such as sweet basil. Often shares habitat with the crab spider Misumena vatia. In prairie and grassland environments, shows specific microhabitat selection patterns that differ from sympatric congener Phidippus apacheanus.

Eastern North America, extending throughout most of the United States and southern Canada. Recorded from western Mexico. Documented in northeastern Kansas old fields where it represented 52% of jumping spiders in a 2002 survey.

Adults present in early summer. Breeding season peaks early to mid-July, with males dying off by mid-season. Females construct nests and lay eggs by August. Spiderlings emerge and disperse approximately 50–57 days after egg membrane shedding (late summer to early fall).

Active predator consuming insects, other spiders, and terrestrial arthropods. Prey size ranges up to adult earwigs—exceptionally large for a salticid. Documented prey includes fruit flies (up to 41 individuals consumed in 4 hours by one specimen), wolf spiders (Schizocosa ocreata), and the fourlined plant bug Poecilocapsus lineatus. Hunting strategy combines ambush waiting with active pursuit; often waits upside-down on vegetation to detect prey, then jumps down to capture.

• Aporinellus completus - parasitoidCalifornian wasp that paralyzes spider and attaches egg to abdomen
• Idris saitidis - parasitoidScelionid wasp that parasitizes egg sacs
• Mermithid nematodes - parasiteInfest spider, damaging muscles, digestive system, and reproductive system

Egg stage: membrane shed in 24–26 days. First instar: remain in cocoon, first molt at 24–28 days post-membrane shedding. Dispersal: 2–3 days after first molt, spiderlings leave nest and become independent. Pre-hunting period: several hours to 2 days of random activity before seeking cover and feeding. Maternal care: female guards egg sac and dies few days after spiderling dispersal. Semelparous: most females produce only one clutch (average 135 eggs), though some produce multiple; females die after first brood leaves, unlike most Phidippus species.

Ambush hunting: frequently waits upside-down near plant tops to detect prey, then jumps down rapidly. Prey handling: remains stationary after capture until undigestible remains are discarded; feeding rate slows after food deprivation. Mating system: males compete through vibration signals and visual displays on leaves; contest winners determined by vibration rate and body size. Males use leg-fencing and may escalate to grappling. Female-female contests more physically violent, with higher injury and mortality risk. Mate choice: males prefer larger, faster-maturing females; females may remate with larger males after initial mating. Experience effects: previous contest winners more likely to win again; recent experience more influential than early experience. Nest fidelity: individuals return to same nest overnight using visual landmarks; males remain at nests only when paired with females.

Generalist predator regulating populations of insects and other arthropods in old field ecosystems. Documented biocontrol agent candidate for fourlined plant bug (Poecilocapsus lineatus) in sweet basil cultivation. Serves as host for parasitoid wasps and nematodes, contributing to food web complexity.

Investigated for biological control of agricultural pests, specifically the fourlined plant bug in greenhouse sweet basil production. Advantages include visual prey detection, broad prey range, combined ambush and active hunting, prey learning and recognition, and ease of individual rearing. Limitations include cannibalism preventing mass rearing. Potential for field deployment through egg sac collection and translocation, or via sweep netting and artificial nest site provision.

• Phidippus apacheanusOverlaps in distribution and habitat; distinguished by P. clarus having black cephalothorax with bright abdominal markings versus P. apacheanus uniform intense red coloration. Microhabitat selection differs in sympatry.
• Phidippus cardinalisSimilar size and general form; P. cardinalis more orange with lighter (sometimes silvery) bristles and often shows abdominal markings (anterior light line, possible dorsal spots) absent in P. clarus.
• Misumena vatiaFrequently syntopic; both wait on vegetation for prey. M. vatia is a crab spider (Thomisidae) with different body form—flattened, laterally extended legs—and does not jump.

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Jeepers Creepers, where’d ya get those multilayered retinae? | Beetles In The Bush
• Microhabitat Selection of the Jumping Spiders Phidippus clarus Keyserling and Phidippus apacheanus Chamberlin and Gertsch (Araneae: Salticidae) in Northeastern Kansas
• Egg Parasitism of the Jumping Spider, Phidippus clarus (Salticidae) by the Parasitoid Wasp, Idris saitidis (Scelionidae)