Cryptotendipes emorsus (Townes)

Epler, J. H., 2018, The genus Cryptotendipes Beck et Beck in Florida, with the description of a new species (Diptera: Chironomidae: Chironominae), Zootaxa 4433 (3), pp. 583-594 : 586-587

Cryptotendipes emorsus (Townes)

Harnischia (Harnischia) emorsa Townes, 1945: 161 . Original description.

Cryptotendipes emorsus (Townes) , Saether 1977: 97, fig. 34A; Yan et al. 2005: 2, figs 1A–C; Zorina 2006: 343, Figs. 1–2, Saether 2010: 8, figs. 4A–E.

Townes (1945) described the species from Iowa, New Jersey, New York, Ohio and Washington, D.C., material. Saether (1977) keyed the adult of this species and illustrated the hypopygium ( Saether 1977: fig. 34A); Saether (2010) keyed, described and illustrated the female, pupa and larva based on material from Manitoba, Canada. Caldwell et al. (1997) listed it from Florida, North Carolina and South Carolina. The species has a Holarctic distribution; Makarchenko et al. (2005) list it from Moneron Island (a small island off the southwest coast of Sakhalin Island, Russia, north of Hokkaido, Japan), and Zorina (2006) included it in her key for Cryptotendipes of the Russian Far East.

Saether (1977) stated in his key that the superior volsella of C. emorsus was “without microtrichia”; Yan et al. (2005) made a similar statement in their key. However, examination of numerous specimens, including the holotype’s hypopygium, indicates that the appendage does bear microtrichia near the base (Figs. 5, 6, 7). This condition was also noted in Zorina’s (2006) key to Far Eastern Russian Cryptotendipes species.

Most pupae bear a row, interrupted medially, of clear, thin spines anteriorly on S I and II; Saether (2010) noted them only on S I.

Saether (2010: 9) gave postmentum lengths of 120–130, mean 125 µm for C. emorsus larvae. In a sample of ten larvae from Florida, postmentum lengths ran from 118–143, mean 127 µm.

This is the most common species of Cryptotendipes in Florida.

Material examined: ALABAMA: Elmore Co., Channahatchee Creek 1.7 miles NE of Kent, 31-v-1988 [APC- 5], leg. W.E. Garrett, 1 male [JHE] . Macon Co., Euphapee Creek 1.2 miles NNE of Franklin at Hwy 49 [APC-27], 10–28-iii-1989, leg. W.E. Garrett, 1 male [JHE]. FLORIDA: Alachua Co., Santa Fe River @ Worthington Springs [SFR 030], i-xii-1999, 2 pharate male pupae [JHE] ; same locality, 12-vi-2006, 1 pharate male pupa [JHE] . Duval Co., [ Beck’s notes state “small creek E Meadowbrook Rd], 29 Jan 1962, 1 partial male abdomen/ Pex / Lex [Pex / Lex on separate slide from partial male abdomen; determined as casuarius by Beck] [ FAMU] . Flagler Co., Rayonier Ditch , [26-v-1964], 1 male [determined as casuarius by Beck] [ FAMU] ; same locality and collector, 15-iii-1967, 2 males / Pex / Lex [JHE] . Hamilton Co., Hunter Creek , 21-iii-2000, 1 pharate male pupa [JHE]; Camp Branch, 30-x- 2007, 1 pharate male pupa, 1 pharate female pupae [JHE] . Lafayette Co., Allen Mill Run, 29-iv-1999, leg. J.H. Epler, 3 males/Pex/Lex, 1 female/Pex/Lex [JHE]. Madison Co., Withlacoochee River above Madison Blue Spring , 15-xi-2017, 1 male pupa, 2 larvae, leg. Sheri A. Huelster, Megan A. Goetz, Brad H. Morris, Stephanie J. Healey, Brandon M. Wanner [JHE]. Okaloosa Co., Blackwater R. FAMU Biol . Sta 4½ mi NW of Holt, 5-v-1976, (light), W.L. & JG. Peters, 1 male [ FAMU] . Santa Rosa Co., Blackwater R., March 12, 1971, W.M. Beck, 1 female pupa [ FAMU] ; Blackwater River , 14-iii-1971, leg. Beck, 3 Males / Pex / Lex [JHE] . Santa Rosa Co., Blackwater Basin, Riley’s Creek; 18 October 1974; W.M. Beck, Jr. 1 male/Pex/Lex, 1 female/Pex/Lex [FAMU]; Ates Creek at FAMU Bio . Sta. hse (drift net), 24–25-xii-1978, A.R. Soponis, B.T. Kidd, 1 male pupa [ FAMU] . Suwannee Co., Suwannee River @ Ellaville [SUW 100], 10-ix-1990, 1 pharate male pupa/ Lex [JHE] . Wakulla Co., Wakulla River at Mysterious Waters boat dock, 11-x-2015, leg. J.H. Epler, 1 female / Pex / Lex [JHE]. GEORGIA: Bibb Co. , Lake Tobesofkee, Sta. LT-4, 2% rt. bank 7 feet deep, 8-30-74, [M.] Gaddis & [G.] Petersen, 1 female pupa [ BAC] . Crisp Co., pond near hospital, 2nd, 3rd Ave., Cordele, 5-xii-1990, leg. B.A. Caldwell, 1 male [ BAC] . Macon Co., Beaver Creek , Winchester Rd, 10-ix-1991, leg. B.A. Caldwell, 1 female Pex [ BAC] . Murray [Co.], Carter’s Res. Apr. 17 [19]80, coll. P. Hudson, 1 male [ PLH] . Tift Co., Tifton , 8th St. near I-75 and Agrirama, 25-ii-1999, leg. B.A. Caldwell, 2 males [ BAC] . MICHIGAN: Washtenaw [Co.], Silver Lake, June 2 [20]14, coll. P. Hudson, 1 male [ PLH] . Wayne [Co.], Belle Isle northern end, May 11 [20]15, coll. P. Hudson, 1 male [ PLH] . NEW YORK: Ithaca , June 6, 1935, H.K. Townes, Type 68, holotype male genitalia on slide [ EMUS] . NORTH CAROLINA: Lake Norman , May 1971, 1 male pupa [ FAMU] . SOUTH CAROLINA: Barnwell [ Co. ], Sav [annah] River Plant, S-Area Bay, E-trap, 24-iv-79, coll. P. Hudson, 1 male [ PLH] . Clemson , Lake Hartwell Holiday Inn, 6/22-28/79, P. Hudson, 1 male [ PLH] .

PLATE 2. C. rutteri pupal structures, holotype. Fig 11. Abdominal tergites V–VI. Fig. 12. Abdominal tergites, VII–VIII. Fig. 13. Abdominal sternites, V–VI. Fig. 14. Abdominal sternites VII–VIII.