Spiders of North Carolina

Arachnids of North Carolina

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

Microbisium parvulum - No Common Name Neobisiidae Members:			NC Records	BugGuide Account	Public View

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Distribution Records
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Vetting Levels

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

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synonym

taxonomic_comments

Synonyms: Obisium parvulum, Microbisium confusum. 12 species in the genus worldwide, 2 in the US, both occur in NC

species_comment

id_comments

ID the family by each leg with six segments, dentate inner margin on moveable finger of chelicera, and pleural membranes granular. ID the genus by spinneret on moveable finger of chelicera is a rounded knob, four eyes, palpal chela with 3 trichobothria on moveable finger and 7 on fixed finger (Novobisium has 4 and 8, respectively). M. parvulum is smaller than M. brunneum, with differences in spacing of trichobothria.

total_length

Body length 1.5 - 2 mm

structural_features

silk_web

fld_guide_descriptions

online_photos

prey

predators

behavior

distribution_reference

technical_reference

Nelson, S.O., J., 1982. The external morphology and life history of the pseudoscorpion Microbisium confusum Hoff. Journal of Arachnology, 10, p.261-274. Nelson, S.O., J., 1984. The genus Microbisium in North and Central America (Pseudoscorpionida, Neobisiidae). Journal of Arachnology, 12, p.341-350. Buddle, C., 2010, Photographic key to the pseudoscorpions of Canada and the adjacent USA, Canadian Journal of Arthropod Identification, No. 10.

adult_id

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

abundance

A study in upstate New York found Microbisium parvulum in the leaf litter year round, even under snow, at densities ranging from 25 to more than 300 individuals per square meter.

distribution_comments

Widespread throughout North America

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

Leaf litter, very diverse habitats, from dry open fields to swamps and floodplains.

observation_methods

state_protection

NHP_ranks

NHP_status

status_comments

Photo Gallery for Microbisium parvulum No common name
	Recorded by: Carol Tingley Durham Co. Comment:	Recorded by: Carol Tingley Carteret Co. Comment: leaf litter
	Recorded by: Carol Tingley Carteret Co. Comment: leaf litter	Recorded by: Carol Tingley Robeson Co. Comment: leaf litter
	Recorded by: Carol Tingley Chatham Co. Comment: Rocky slope, leaf litter	Recorded by: Carol Tingley Washington Co. Comment:
	Recorded by: Carol Tingley Orange Co. Comment: Leaf litter	Recorded by: Carol Tingley Orange Co. Comment: Leaf litter

Photo Gallery for Microbisium parvulum No common name