Polycentropus dinkinsorum Orfinger & Etnier 2020, new species
Creators
- 1. Center for Water Resources, Florida A & M University, Tallahassee, FL 32307, USA & Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA
- 2. Professor Emeritus, Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, Tennessee 37996 USA dipnet @ utk. edu; https: // orcid. org / 0000 - 0001 - 5923 - 5080
Description
Polycentropus dinkinsorum Orfinger & Etnier, new species
Figures 1 A–1D.
Description. General Structure: Length 6.1–7.2 mm (n = 4). General habitus typical of males of the P. confusus Species Group. In ethanol, eyes dark purple and glazed; body color various shades of brown, with subtle spots of lighter brown forming irrorate pattern on front wings; hind wings uniformly brown; legs tan to pale yellow.
Male genitalia (Fig. 1). Abdominal segment VIII annular. Tergum IX fused with segment X, membranous, caudally extended as horn-like projection in lateral view (Fig. 1A). Sternum IX round in lateral view, posterior margin lobate. Intermediate appendages positioned beneath terga IX+X, distally extending beyond tergum X, apices each bearing 3 small setae; in lateral view (Fig. 1A) curved slightly ventrad; in dorsal view (Fig. 1B) apices proximate, parallel. Preanal appendages triangular in lateral view (Fig. 1A), each with posterior angle acute, forming tooth-like projection; in lateral view dorsal process wide basally, distally slender, terminating in long, whiplike process curved ventrad terminating in slender spine; in dorsal view (Fig. 1B) sub-parallel, slender, elongate. Inferior appendages each with ventral portion in lateral view gradually tapered, extended posterad slightly beyond intermediate appendages, ventral margin nearly straight; in ventral view (Fig. 1C), mesal projection near midlength, distal half curved inward; dorsobasal process in lateral view erect, with long “neck” terminating in short, rounded “head” projecting downward, in ventral view (Fig. 1C) obscured completely by ventral portion of inferior appendage. Phallus in lateral view (Fig. 1D) slightly curved ventrad, mesoventral protuberance arising near midlength, apical section rectangular, spinules absent, phallic sclerite moderately elongate with narrow distal portion.
Female and Larva: Unknown
Diagnosis. The male of P. dinkinsorum can be separated from those of all other currently known members of the P. confusus Species Group by the sharpness of the acute, tooth-like projection of the posteroventral margin on the body of the preanal appendage compared to the more blunt tooth-like projection of the posteroventral margin on the body of the preanal appendage, or absence of the tooth-like projection. Male genitalic structure is most similar to that of P. carolinensis and P. carlsoni. It can readily be separated from both P. carolinensis and P. carlsoni by the presence of a mesoventral protuberance on the phallus, the longer “necks” of the dorsobasal process of the inferior appendages, and the more obtusely curved “heads” of the dorsobasal processes of the inferior appendages. Males can also be distinguished from P. carlsoni by the slight downward curvature of the phallus, versus the stronger curvature exhibited by P. carlsoni, and the more obtusely curved head shape of the dorsobasal process of the inferior appendage. From P. carolinensis it can also be separated by the presence of a distinctly pronounced, horn-like, apical projection of the combined terga IX+X extending caudad over the intermediate appendages. From P. floridensis, P. pentus, and P. vernus, which each exhibit a ventral swelling on the phallobase, males of P. dinkinsorum can easily be separated by the more distal location of the mesoventral protuberance, the shape of the dorsobasal process of each inferior appendage. From P. floridensis and P. vernus, P. dinkinsorum can be distinguished by the presence of the acute, tooth-like projection of the posteroventral margin of the preanal appendage and from P. pentus by the prominent profile of this projection (set in a concavity in P. pentus).
Material Examined. Holotype: USA. North Carolina: Henderson County, Flat Rock, Carl Sandburg Home National Historic Site, Malaise Trap, [N35°16’16.28, W82°27’01.04”], I. Hoff and E. Eleantar coll., 20-ix-2012, 1 male (USNMENT 01350618).
Paratypes: USA. West Virginia: Raleigh County, Piney Creek tributary, New River system, [N37°50’39.08”, W81°06’48.88”], G.R. Dinkins, B.J. Dinkins, and H.O. Faust coll., 25-vi-2014, 1 male (CUAC000107314). North Carolina: Swain County, Great Smoky Mountains National Park, Kephart Prong Trail near trail head across from bridge over Oconaluftee River, blacklight trap, 834 m, [N35°35’11.52”, W83°21’32.87”], B. Sullivan coll., 23– 25-vii-2000, 1 male (USNMENT 01350619), 1 male (FAMU), 1 male (INHS Insect Collection 923902). North Carolina: Henderson County, Carl Sandberg Home National Historic Site, Flat Rock, Duck Pond, Malaise Trap, [N35°16’15.96”, W82°27’01.04”], I. Hoff and E. Eleantar coll., 16–24-v-2012, 1 male (ROME184984). Haywood County, Great Smoky Mountains National Park, Mt. Sterling Trail, D. Paulsen coll., 27-vi-1989, 9 males (UTK 3.269). Tennessee: Carter County, Roan Mountain State Park, black light, J. Ensminger coll., 6–12-viii-2000, 1 male (CASENT8468186). Blount County, Great Smoky Mountains National Park, Sams Creek, 100 m below Thunderhead Creek, D. Etnier coll., 7-vi-1996, 1 male (UTK 3.288).
Comparative Material Examined. The comparative material examined (Table 1) represents the remaining members of the P. confusus Species Group, with the exception of P. vernus Hamilton, Harris, & Lago 1990 for which the original description and illustrations were used. Type material was examined when available for most species, and all original descriptions were consulted.
Etymology. Named in honor of the family of Gerald R. and Barbara J. Dinkins, students, colleagues, and participants in many aquatic biology efforts throughout our long friendship. Their three adult “children”, Jamie, Timothy Charles (T.C.), and Zack, share our interests in science and the environment, and are also recognized in this species epithet.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- CUAC , FAMU, INHS
- Event date
- 1989-06-27 , 2012-09-20 , 2014-06-25
- Family
- Polycentropodidae
- Genus
- Polycentropus
- Kingdom
- Animalia
- Material sample ID
- CUAC000107314 , ROME184984, UTK 3.269, CASENT8468186, UTK 3.288
- Order
- Trichoptera
- Phylum
- Arthropoda
- Scientific name authorship
- Orfinger & Etnier
- Species
- dinkinsorum
- Taxonomic status
- sp. nov.
- Taxon rank
- species
- Type status
- holotype , paratype
- Verbatim event date
- 1989-06-27/2012-05-24 , 2000-07-23/25 , 2012-09-20 , 2014-06-25
- Taxonomic concept label
- Polycentropus dinkinsorum Orfinger & Etnier, 2020
References
- Ross, H. H. & Yamamoto, T. (1965) New species of the caddisfly genus Polycentropus from eastern North America (Trichoptera, Psychomyiidae). Proceedings of the Biological Society of Washington, 78, 241 - 246.
- Morse, J. C. (1971) New caddisflies (Trichoptera) from the southeastern United States. Journal of the Georgia Entomological Society, 6, 77 - 84.
- Banks, N. (1905) Article XII. - Descriptions of new species of neuropterous insects from the Black Mountains, N. C. Bulletin of the American Museum of Natural History, 21, 215 - 218.
- Banks, N. (1914) American Trichoptera-Notes and descriptions. The Canadian Entomologist, 46, 149 - 156 (including pls. VIII-X) + 201 - 205 (including pl. XV) + 252 - 258 (including pl. XX) + 261 - 268. https: // doi. org / 10.4039 / Ent 46252 - 7
- Hagen, H. A. & Uhler, P. R. (1861) Synopsis of the Neuroptera of North America, with a list of the South American species. Prepared for the Smithsonian Institution. Smithsonian Miscellaneous Collections, 4 (1), i-v + 1 - 347. https: // doi. org / 10.5962 / bhl. title. 60275
- Ross, H. H. (1944) The caddisflies, or Trichoptera, of Illinois. Bulletin of the Illinois Natural History Survey, 23, 1 - 326. https: // doi. org / 10.21900 / j. inhs. v 23.199
- Lago, P. K. & Harris, S. C. (1983) New species of Trichoptera from Florida and Alabama. Annals of the Entomological Society of America, 76 (4), 664 - 667. https: // doi. org / 10.1093 / aesa / 76.4.664
- Banks, N. (1908) Some Trichoptera, and allied insects, from Newfoundland. Psyche, 15, 61 - 67, pl. II. https: // doi. org / 10.1155 / 1908 / 78191
- Ross, H. H. (1947) Descriptions and records of North American Trichoptera, with synoptic notes. Transactions of the American Entomological Society, 73, 125 - 168.
- Ross, H. H. (1941) Descriptions and records of North American Trichoptera. Transactions of the American Entomological Society, 67 (1084), 35 - 126, 13 pls.
- Hamilton, S. W. & Holzenthal, R. W. (1986) Two new species of caddisflies from Georgia (Trichoptera: Polycentropodidae, Hydroptilidae). Proceedings of the Entomological Society of Washington, 88 (1), 163 - 166.