Anillinus elongatus Jeannel

Sokolov, Igor M., Carlton, Christopher & Cornell, James F., 2004, Review of Anillinus, with Descriptions of 17 New Species and a Key to Soil and Litter Species (Coleoptera: Carabidae: Trechinae: Bembidiini), The Coleopterists Bulletin 58 (2), pp. 185-233 : 199-200

publication ID	https://doi.org/ 10.1649/611
persistent identifier	https://treatment.plazi.org/id/845C8783-124E-FE11-5E8A-FDD4FE5FFEED
treatment provided by	Tatiana
scientific name	Anillinus elongatus Jeannel
status

Treatment

Anillinus elongatus Jeannel View in CoL

( Figs. 10, 14 View Figs , 18 View Figs , Map fig. 38)

Anillinus elongatus Jeannel, 1963 b:151 View in CoL . Remnants of type (probably female) glued on plastic triangle /white card rectangle with glued abdomen with both hind legs of unknown? Trechini View in CoL / Chapel Hill, N.C., 18 April 1932, J.M.Valentine/ Anillinus elongatus Bar View in CoL $ Allotype HSB. 1932/ TYPE/ TYPE No 69544 USNM/ Anillinus elongatus View in CoL type R.Jeannel det., 19 / specimens destroyed? or on box bottom, reglued 28 Sept 71, T. L. Erwin/ deposited USNM. Neotype here

designated. Male, point-mounted with aedeagus in genitalia vial labeled /NC, Orange Co., Chapel Hill, Morgan Cr. 17.IV.94, J.F.Cornell, ex soil 994 IV 17-1- 5/ deposited NCSU.

Holotype examined. Specimen is glued on plastic triangle and totally destroyed, the remains include an abdomen and metathorax with right posterior leg, abdomen without content (dissected?). The type bears the label ‘‘specimen destroyed? or on box bottom, reglued 28 Sept 71, T.L. Erwin’’ and a hand-drawn cartoon of the glued posterior parts of a male, probably of some Trechini . Jeannel (1963 b) based this species on two specimens, the USNM holotype that is destroyed, and a male paratype at the Museum National de’Histoire Naturelle that we have not seen. The International Code of Zoological Nomenclature (1999: Article 75, Recommendation 75A) recommends that surviving paratypes be given priority in designating neotypes but does not exclude designation of specimens that were not part of the original type series. In the current situation, the surviving paratype has not been seen, but additional specimens from the type locality are available, fit the original description, and no additional Anillinus species are known to occur in the eastern piedmont region of North Carolina. Therefore, in the interest of nomenclatural stability and to fix the name A. elongatus to a primary type, we are designating one of those specimens as the neotype.

Description. Small to large-sized for genus (ABL range of topotypic specimens, 1.63–1.70 mm; mean, 1.66 mm, n ¼ 3; ABL range of Mecklenburg Co., NC specimens, 2.06–2.14 mm; mean 2.10 mm, n ¼ 2). Habitus slightly convex, elongate (WE/ABL, 0.35) with normally proportioned head for genus (WH/WPm, 0.76) and narrow pronotum and elytra (WPm/WE, 0.84). Color of body brunneorufous, appendages testaceous. Dorsal microsculpture distinct across head and most part of pronotum except narrow area with indistinct microsculpture along midline. Width of smooth part on disc of pronotum various, from one-third to one-fourth of total pronotal width.

Pronotum moderately convex, moderately transverse (WPm/LP, 1.34), with margins moderately and rectilinearly constricted posteriad (WPm/WPp, 1.34). Anterior angles evident, slightly prominent. Posterior angles slightly obtuse (100–1108). Width between posterior angles slightly less than between anterior angles (WPa/WPp, 1.05).

Elytra slightly convex, moderately depressed along suture, of normal length for genus (LE/ ABL, 0.58), with traces of 2–3 interneurs. Humeri slightly prominent, markedly rounded. Vestiture of elytra relatively short (less than one-fourth the length of discal setae).

Males with metafemora ( Fig. 10) modified; each bearing a small granulate projection along posterior margin in apical third and small regular tubercles along basal two-thirds. Each metatibiae ( Fig. 14 View Figs ) also bearing a posterior row of small tubercles.

Median lobe ( Fig. 18 View Figs ) evenly arcuate and twisted, with enlarged quadrangular apex. Internal sac with weak development of copulatory pieces. Dorsal sclerite forming a filament-like structure that is short and does not extend far beyond internal sac. Ventral sclerite and spines absent.

Material Examined (8, JFC). Two specimens bearing same data as neotype; 1 specimen labeled / NC, Orange Co., 10 mi N Chapel Hill, 4 Apr 74, P Debs. UndOakLog /; 2 specimens labeled / NC Mecklenburg Co nr Mint Hill on McAlpine Cr 12 Apr 94 JF Cornell ex Soil under Stream Debr /; 2 specimens labeled / NC Cabarrus Co 5 mi W Davidson 11 Ap. 94 JF Cornell III Don Sheldon ex soil nr log /.

Distribution. This species is known from several localities in the eastern (Orange County) and western (Mecklenburg and Cabarrus Counties) piedmont of North Carolina. ( Fig. 38).

Habitat. Specimens were collected from soil and under logs and stream debris. Remaining habitat at the type locality is a mixture of piedmont oak/hickory forest, including pockets of beech/maple forest in ravines and riparian areas (North Carolina Botanical Garden) and second growth deciduous/pine flatwoods ( Old Mason Farm Nature Preserve ) .

Differential Diagnosis. Anillinus elongatus is parallel-sided with indistinct microsculpture on the disc of the pronotum ( Table 2, group V of endogean species). The species is allopatric with respect to other described species of Anillinus . From its geographically closest congeners it differs by its elongate subparallel habitus, and by the characteristic microsculpture pattern on the forebody in addition to features mentioned in the key. The posterior rows of tubercles on the male metafemora and metatibiae are similar to those of A. lescheni , far to the west in Oklahoma, though they are less developed than in that species and aedeagal characters are totally different.

Comments. Thomas Barr was kind enough to provide CEC the following information regarding the type locality of this species that was not included in Jeannel’s description (communicated to him by J. Manson Valentine, the collector): ‘‘along Morgan Creek, which is on the southeast side of Chapel Hill’’ (T. Barr pers. comm., July 2002). One of us (CEC) visited the area in southern Chapel Hill during early August 2002 and collected three large (; 10 kg) Berlese samples from promising habitat on property owned by the University of North Carolina and managed by the North Carolina Botanical Garden. Litter in the area was dry due to an extended drought. Litter dwelling arthropods were recovered, including a typical assemblage of beetles, but no specimens of Anillinus . During December 2002, Debra Murray (University of Kentucky, Lexington) and members of her family joined the search and collected litter from the same area and others in and around Chapel Hill. Again, numerous beetles were collected, but no Anillinus specimens. We subsequently learned that J. F. Cornell had conducted an earlier successful search for the species at the type locality and had been collecting and studying the genus for almost 30 years. All of Cornell’s specimens were collected using a soil washing/floatation technique. This method entails submerging soil samples in water and agitating, then removing the organisms as they rise to the surface. Extensive Berlese sampling by Cornell during various seasons between 1971 and 1993 were unsuccessful.

The specimens from Mecklenburg County are substantially larger than those from the type locality or from nearby Cabarrus County . The details of the male aedeagus, modified male metafemora, and overall proportions compare favorably with specimens from the type locality. Additional sampling at and between the somewhat distantly separated collecting localities is needed to determine the current degree of continuity and variation among populations .