Spiders of North Carolina

Arachnids of North Carolina

Order:
Scientific Name: Common Name:		Family (Alpha):

Leiobunum uxorium - No Common Name Sclerosomatidae Members:			NC Records	BugGuide Account	Public View

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Distribution Records
PDF

Vetting Levels

Adult phenology:
High Mountains (HM) ≥ 4,000 ft.
Low Mountains (LM) < 4,000 ft.
Piedmont (Pd)
Coastal Plain (CP)

Click on graph to enlarge

synonym

taxonomic_comments

Approximately 30 species in this genus have been identified as occurring in North America north of Mexico (Cokendolpher and Lee, 1993; Ingianni et al., 2011), with 16 recorded in North Carolina. However, the validity of several of these species is suspect, with several that will probably be determined to be synonyms of other species, e.g., davisi, speciosum, and zimmermani in North Carolina Burns et al., 2012; Shultz, 2018). According to Shultz (2018), moreover, recent phylogenetic studies indicate both that more species are waiting to be described and that the name Leiobunum may eventually be restricted to European species, requiring new generic names for most, if not all, of our species.

species_comment

Placed in the Leiobunum vittatum Species Group by Burns et al. 2012) based on both reproductive structures and genetic analysis. In North Carolina, this group also includes L. vittatum.

id_comments

The dorsal surface of the males is golden yellow; the central figure is obsolete or faint. The ventral surface and coxae are cinnamon brown. The palpi are yellow but the legs are dark brown or black; the dark trochanters contrast strongly with the paler coxae (Davis, 1934). In females, the dorsum is light brown and the venter is noticeably lighter (Davis, 1934). The central figure is dark brown with light spots; the area lateral to the central figure is golden brown, also with light spots (Shultz, 2018).

total_length

4 mm, males; 6.5 mm, females (Davis, 1934)

structural_features

In males, the abdomen is trucated posteriorly; in females, it is rounded.

silk_web

fld_guide_descriptions

online_photos

BugGuide, The Harvestmen of Maryland

prey

predators

behavior

distribution_reference

Crosby and Bishop (1924); Brimley (1938)

technical_reference

Davis (1934); Shultz (2018)

adult_id

1 identifiable by photo 2 identifiable by photo of specific features and/or supplementary info 3 identifiable from specimen only

abundance

We currently have too few records from North Carolina to judge its frequency of occurrence or abundance

distribution_comments

We have records from the High Mountains to the Coastal Plain

checklist_mt_high
>=4,000 ft.

Regular	Frequent	Infrequent	Occasional	Seldom	Frequency Regular – almost always observed on given visit; >=90% chance of observation Frequent – usually observed on a given visit; >=50%<90% chance of observation Infrequent – observed less than 50% of visits; >=25%<50% chance of observation Occasional – observed on only on a small minority of visits; >=10%<25% chance of observation Seldom – not usually seen on visits; <10% chance of observation These terms refer to visits to appropriate habitats made at appropriate times of the year, making use of common sampling/observation methods. Under those conditions, Frequency refers to the chance of observing at least one individual on a given visit made anywhere within a particular region, or over multiple visits to a single site.

checklist_mt_low
<4,000 ft.

Regular	Frequent	Infrequent	Occasional	Seldom

checklist_pd
Piedmont

Regular	Frequent	Infrequent	Occasional	Seldom

checklist_cp
Coastal Plain

Regular	Frequent	Infrequent	Occasional	Seldom

habitat

Crosby and Bishop (1924) reported seeing a large number of mating pairs on a sunny bank on the edge of a pine woods.

observation_methods

This is a late season species, persisting into early winter (Shultz, 2018)

state_protection

Arachnids are not protected under state law, although permits are needed to collect them in State Parks and other public and private nature preserves

NHP_ranks

[GNR] [S3S5]

NHP_status

status_comments

We have only one recent record for this species in the state but it appears to occupy a wide range within the state and does not appear to be habitat-limited. It will therefore probably be determined to be secure within the state.

Photo Gallery for Leiobunum uxorium No common name
	Recorded by: Steve Hall, Carol Tingley, Tom Howard, David George, Pat Coin, Jeff Niznik, Chatham Co. Comment:	Recorded by: Nathan Vaughan Person Co. Comment:
	Recorded by: Steve Hall Orange Co. Comment: Seen at moth sheet after midnight	Recorded by: Steve Hall Orange Co. Comment: Several seen at moth sheet
	Recorded by: Owen McConnell Durham Co. Comment: Photographed at 6:51 A.M.	Recorded by: Owen McConnell Durham Co. Comment: Photographed at 6:51 A.M.
	Recorded by: Steve Hall Orange Co. Comment: Male, at moth sheet	Recorded by: Steve Hall Orange Co. Comment: Female; seen at moth seet
	Recorded by: Steve Hall Orange Co. Comment: Female; seen at moth seet	Recorded by: Steve Hall Orange Co. Comment: Male
	Recorded by: Steve Hall Orange Co. Comment:	Recorded by: Steve Hall Orange Co. Comment: Male at moth sheet

Photo Gallery for Leiobunum uxorium No common name