Cernotina truncona - Ross, 1947
Florida Cernotinan Caddisfly
Taxonomic Status: Accepted
Related ITIS Name(s): Cernotina truncona Ross, 1947 (TSN 115385)
Unique Identifier: ELEMENT_GLOBAL.2.115999
Element Code: IITRI09010
Informal Taxonomy: Animals, Invertebrates - Insects - Caddisflies
 
Kingdom Phylum Class Order Family Genus
Animalia Mandibulata Insecta Trichoptera Polycentropodidae Cernotina
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Concept Reference
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Concept Reference: Clemson University Department of Entomology (J.C. Morse, ed.). 2002. Last Updated 5 September 2006. Trichoptera World Checklist. Online. Available: http://entweb.clemson.edu/database/trichopt/index.htm.
Concept Reference Code: N02CLE01EHUS
Name Used in Concept Reference: Cernotina truncona
Taxonomic Comments: Described by Ross as morphologically distinct from other members of the genus CERNOTINA. The female and immature stages are unknown.
Conservation Status
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NatureServe Status

Global Status: G4
Global Status Last Reviewed: 06Mar2009
Global Status Last Changed: 30Mar2005
Rounded Global Status: G4 - Apparently Secure
Reasons: A relatively common species which covers much of the southeastern U.S.
Nation: United States
National Status: N4 (30Mar2005)

U.S. & Canada State/Province Status
United States Alabama (S1), Florida (S3), North Carolina (SNR), South Carolina (SNR), Virginia (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent: 20,000-2,500,000 square km (about 8000-1,000,000 square miles)
Range Extent Comments: In Florida, the species is southeastern in its distribution, and in Florida occurs across most of the state (Rasmussen et al., 2008). It also occurs in Barbour, Covington, Escambia, and mobile counties, Alabama; North and South Carolina; and Virginia, USA. Rasmussen (2004) lists it as an uncommon southeastern coastal plain species.

Number of Occurrences: 81 - 300
Number of Occurrences Comments: Appears to be relatively widespread. Exact number of occurrences is unknown but is probably high. Rasmussen (2004) found this species at only one site in northern Florida ravine surveys but indicated this species is a pond/lake species not a ravine species. Rasmussen et al. (2008) documented 14 new occurrences in Florida making Florida distribution in the Apalachicola, Choctawhatchee, Kissimmee, Oklawaha, Santa Fe, St. Johns (lower and upper), and St. Marks River basins, and East Coast (upper) and southeast Florida coast.

Population Size: >1,000,000 individuals
Population Size Comments: Relatively common along the southeastern U.S.

Number of Occurrences with Good Viability/Integrity: Some (13-40)
Viability/Integrity Comments: In Florida peninsular lakes, population levels are very abundant in some cases (Rasmussen et al., 2008).

Overall Threat Impact Comments: Pollution, siltation, and other forms of environmental degradation.

Short-term Trend: Relatively Stable (<=10% change)
Short-term Trend Comments: The long-term outlook for C. truncona is favorable as long as the lake habitat that supports them is protected (Rasmussen et al., 2008).

Long-term Trend: Decline of <30% to increase of 25%

Other NatureServe Conservation Status Information

Inventory Needs: Survey for additional EOs and estimate relative abundance and density at known EOs.

Protection Needs: Populations should be monitored for any signs of decline.

Distribution
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Global Range: (20,000-2,500,000 square km (about 8000-1,000,000 square miles)) In Florida, the species is southeastern in its distribution, and in Florida occurs across most of the state (Rasmussen et al., 2008). It also occurs in Barbour, Covington, Escambia, and mobile counties, Alabama; North and South Carolina; and Virginia, USA. Rasmussen (2004) lists it as an uncommon southeastern coastal plain species.

U.S. States and Canadian Provinces
Color legend for Distribution Map
Endemism: endemic to a single nation

U.S. & Canada State/Province Distribution
United States AL, FL, NC, SC, VA

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
AL Barbour (01005), Covington (01039), Escambia (01053)
FL Alachua (12001), Bay (12005), Bradford (12007), Clay (12019), Highlands (12055), Lake (12069), Leon (12073), Liberty (12077), Marion (12083), Martin (12085), Osceola (12097), Polk (12105), Putnam (12107), Seminole (12117), Volusia (12127), Washington (12133)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
03 Upper St. Johns (03080101)+, Oklawaha (03080102)+, Lower St. Johns (03080103)+, Daytona - St. Augustine (03080201)+, Kissimmee (03090101)+, Florida Southeast Coast (03090206)+, Santa Fe (03110206)+, Apalachee Bay-St. Marks (03120001)+, Apalachicola (03130011)+, Yellow (03140103)+, Upper Choctawhatchee (03140201)+, Lower Choctawhatchee (03140203)+, Lower Conecuh (03140304)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Habitat Type: Freshwater
Non-Migrant: N
Locally Migrant: N
Long Distance Migrant: N
Riverine Habitat(s): CREEK, MEDIUM RIVER
Lacustrine Habitat(s): Shallow water
Habitat Comments: Coastal plain ponds, lakes, and streams. Rasmussen et al. (2008) lists natural lakes, seepage/steephead streams,
and softwater streams.

Economic Attributes Not yet assessed
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Management Summary
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Biological Research Needs: Immature stages remain unknown, as does female.
Population/Occurrence Delineation
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Group Name: Caddisflies

Use Class: Not applicable
Minimum Criteria for an Occurrence: Occurrences are based on some evidence of historical presence or current presence of single or multiple specimens (including larvae or adults) at a given location with potentially recurring existence. Evidence is derived from reliable published observation or collection data; unpublished, though documented (i.e. government or agency reports, web sites, etc.) observation or collection data; or museum specimen information. Sight records and photographs, though valuable, should not be accepted as the basis for new element occurrences as identification of caddisflies often requires close examination of the genitalia of adult males. Instead, such records should be utilized to further study an area to verify the element occurrence in that area.
Separation Distance for Unsuitable Habitat: 5 km
Separation Distance for Suitable Habitat: 5 km
Alternate Separation Procedure: None
Separation Justification: Wiggins and Mackay (1978) found caddisfly distributions separated by trophic category as related to stream resource availability in Eastern streams; and to a lesser degree in Western streams. Shredders predominated in upstream habitats in relation to grazers and collectors, but the proportion of shredders became smaller downstream. Groups have also been separated ecologically into lotic-erosional (running water riffles), lotic-depositional (running water pools and margins), lentic-limnetic (standing water), lentic-littoral (standing water, shallow shore areas), lentic-profundal (standing water, basin), and beach zone (Wallace and Anderson, 1996). For the purpose of occurrence separation, however, the same genera or species often occur across habitats making such habitat classifications impractical.

Regardless of habitat, caddisfly adults tend to remain somewhat near the emergence site (LaFontaine, 1981; Collier and Smith, 1998) where oviposition occurs. Dispersal away from emergence sites tends to be negatively correlated with density of vegetation along the dispersal corridor; caddisflies tend to disperse shorter distances in dense forest compared with more open vegetation (Collier and Smith, 1998). Although dispersal flights are common especially from temporary habitats, such flights are relatively short and only occur immediately following emergence (unlike some Coleoptera and Hemiptera that also disperse additionally in autumn to overwinter) (Cummins and Merritt, 1996). Kovats et al. (1996) estimated that 85% of all adult Hydropsychidae were collected within 100 m of the water's edge with most of the remainder collected within 250 m, although significant, though small, numbers were collected up to 1845 m inland (esp. for Hexagenia). It is worth noting that in some instances, large river caddisflies may disperse a distance greater than five km from the river, suggesting long distance dispersal (Huryn and Harris, 2000; Kovats et al., 1996). Kovats et al. (1996) suggested this longer distance dispersal is likely accidental. Separation distances (unsuitable and suitable) have therefore been set at five km.

Date: 18Oct2004
Author: Cordeiro, J.
Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 06Mar2009
NatureServe Conservation Status Factors Author: Cordeiro, J. (2009); Golden, W. C. III, and D. R. Jackson (1998)
Element Ecology & Life History Edition Date: 06Mar2009
Element Ecology & Life History Author(s): Cordeiro, J.

Zoological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).

References
Help
  • Clemson University Department of Entomology (J.C. Morse, ed.). 2002. Last Updated 5 September 2006. Trichoptera World Checklist. Online. Available: http://entweb.clemson.edu/database/trichopt/index.htm.

  • Deyrup, M. and R. Franz. 1994. Rare and Endangered Biota of Florida, Volume IV. Invertebrates. University Press of Florida: Gainesville, Florida. 798 pp.

  • Deyrup, M., and R. Franz. 1994. Rare and Endangered Biota of Florida, Volume IV: Invertebrates. University Press of Florida, Gainesville.

  • Deyrup, M., and R. Franz. 1994. Rare and Endangered Biota of Florida, Volume IV: Invertebrates. University Press of Florida, Gainesville. 798 pp.

  • Florida Natural Areas Inventory. No date. Natural Heritage Database. Florida Natural Areas Inventory. Tallahassee, FL.

  • Lenat, D.R., D.E. Ruiter, C.R. Parker, J.L. Robinson, S.R. Beaty, and O.S. Flint, Jr. 2010. Caddisfly (Trichoptera) records for North Carolina. Southeastern Naturalist 9(2):201-236.

  • Pescador, M.L., A.K. Rasmussen, and S.C. Harris. 1995. Identification manual for the caddisfly (Trichoptera) larvae of Florida. Report to the State of Florida Department of Environmental Protection, Tallahassee, Florida, contract numbers WM543 and WM581. 132 pp.

  • Rasmussen, A. K. 2006. Caddisfly (Insecta: Trichoptera) records from the Florida A&M University database.

  • Rasmussen, A. K., D. R. Denson and S. C. Harris. 2008. Status of caddisflies in greatest conservation need in Florida. Final report. Florida Fish and Wildlife Conservation Commission Agreement # 06009. 56 pp.

  • Rasmussen, A.K. 2004. Species diversity and ecology of Trichoptera (caddisflies) and Plecoptera (stoneflies) in ravine ecosystems of northern Florida. Unpublished PhD. Dissertation, University of Florida. 130 pp.

  • Rasmussen, A.K., D.R. Denson, and S.C. Harris. 2008. Status of caddisflies (Insecta: Trichoptera) in greatest conservation need in Florida. Final report to the Florida Fish and Wildlife Conservation Commission, Florida, Agreement 06009, June 1, 2008. 56 pp.

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