Brychius hungerfordi Spangler
|
publication ID |
https://doi.org/ 10.1649/0010 |
|
persistent identifier |
https://treatment.plazi.org/id/03C0651D-342B-FFB9-9DCD-FCB8573C5A6C |
|
treatment provided by |
Valdenar |
|
scientific name |
Brychius hungerfordi Spangler |
| status |
|
Spangler, 1954: 114 (original description)
Roughley, 1991: 295 (faunistic)
Strand and Spangler, 1994: 209 (larval description)
( Figures 1b, 1e View Fig ; 2b View Fig ; 3b View Fig ; 4b View Fig ; 5b View Fig ; 6b View Fig ; 7b View Fig ; 8b View Fig ; 9b View Fig ; 10b View Fig ; 11b View Fig ; 12b View Fig ; 13b View Fig ; 14b View Fig ; 15b View Fig ; 16b View Fig ;
17b View Fig ; 25–27 View Fig View Fig View Fig ).
TYPE MATERIAL: Brychius hungerfordi : Holotype: Male – ‘‘29. Maple River/ McKinley Twp./Emmet Co. Mich./ VIII-8-1952 /Paul J. Spangler’’ [genitalia in glass vial], ‘‘ HOLOTYPE / Brychius /hungerfordi/P.J. Spangler’’ [red], ‘‘Type No./ 62208/USNM’’ [red], ‘‘ Brychius /hungerfordi/Spangler’’ [white label w/black trim] ( USNM). Paratypes: 1 Male, 3 Female – ‘‘29. Maple River/McKinley Twp./ Emmet Co. Mich./ VIII-8-1952 /Paul J. Spangler’’, ‘‘ PARATYPE / Brychius /hungerfordi/P.J. Spangler’’ [blue], ‘‘ PARATYPE / Brychius /hungerfordi/No. 6242 Spangler’’ [yellow] ( CNC). 1 Male, 1 Female – ‘‘29. Maple River/McKinley Twp./Emmet Co. Mich./ VIII-8-1952 /Paul J. Spangler’’, ‘‘ PARATYPE /Cornell U./No. 3152.1’’ [light blue], ‘‘ Brychius /hungerfordi/Spangler/det. GL. Daussin’’ (Cornell). 3 Males, 3 Females – ‘‘29. Maple River/McKinley Twp./Emmet Co. Mich./ VIII-8-1952 /Paul J. Spangler’’ ‘‘ PARATYPE / Brychius /hungerfordi/P.J. Spangler’’ [blue], ‘‘P.J. Spangler/Coll. 1958/221697’’ ( USNM). 2 Males, 1 Female – ‘‘29. Maple River/McKinley Twp./Emmet Co. Mich./ VIII-8-1952 /Paul J. Spangler’’ ‘‘ PARATYPE / Brychius /hungerfordi/P.J. Spangler’’ [blue] ( CAS).
Diagnosis
The adults of B. hungerfordi can be distinguished from the other species by: humeral margins of elytra denticulate, presence of a thick black band on basal margin of pronotum, and larger average size.
The larvae can be distinguished from those of B. hornii by: wide head with many lateral projections ( Fig. 15b View Fig ), the tergites in ventral view expanding past pleuron ( Fig. 17b View Fig ) and the apex of the urogomphus wide and very curved.
378 Description
Adults
Body. – Total body length ranges from 3.7–4.4 mm; maximum body width ranges from 1.90–2.25 mm. Robust; elytra pointed at humeral region. Color testaceous.
Head. – Surface with coarse punctures, smaller than those of pronotum. Head and antennae testaceous, black ring at base of head.
Mouthparts. – Labroclypeus transverse and narrow, shallowly emarginated, rounded at the sides with long setae on anterior margin, covering most of mandibles. Mandibles asymmetrical; right mandible ( Fig. 1b View Fig ) with two apical teeth, ventral tooth hardly noticeable from under dorsal tooth; retinaculum with a mesal comb or brush of setae extending to basal truncated projection. Truncated projection with a small number of ridges. Left mandible ( Fig. 1e View Fig ) with one apical tooth; retinaculum with brush of setae. Maxilla ( Fig. 2b View Fig ) lacinia with spines along inner margin and an elongate two-segmented galea; apical segment of galea rectangular, without small irregularities along lateral margin. Labium ( Fig. 3b View Fig ) wide, ligula with two lateral setae, two small anterolateral projections; penultimate segment of labial palp without lateral sinuation.
Pronotum. – A moderate transverse depression in lateral view at the base between the two plicae; pronotum margined laterally. Color testaceous except: piceous apical spot, lateral and posterior margins, two basal spots, and plicae. Punctures larger and less dense than those of head, interspaces micropunctate; disc less densely punctate. Lateral edges margined with fine serrations.
Elytron ( Fig. 4b View Fig ). – Elongate, slightly broader anteriorly than base of pronotum, gradually broadening to the middle and tapering toward the apex. Posterolateral margins and humeral margins finely serrate. Color testaceous with 10 rows of setigerous punctures not extending completely to apex, intervals micropunctate; elytral margins, sutural stripe and rows of punctures piceous. A piceous humeral spot is present covering the fifth, six, and seventh striae and intervals. At the outer edge is another spot covering the fifth, six, seventh, eighth, and sometimes ninth striae and intervals. At the three quarters is another spot covering the fourth, seventh, eighth, and ninth striae and intervals. Apical margins of elytra acute.
Hind Wing ( Fig. 5b View Fig ). – R3 with crossvein to C forming closed cell. Ct forming closed cell. Rr with horizontal vein; AP and AA veins absent.
Ventral surface. – Prosternal process margined on lateral edges; converging strongly from base to region of fore-coxae, becoming nearly parallel to apex ( Fig. 6b View Fig ); margins and base infuscate, medial portion testaceous; finely and sparsely punctured basally with micropunctures in the interspaces, more coarsely punctate on apical third. Metasternal process strongly margined on lateral edges, margins continued in line with those of prosternal process, sinuate and divergent apically; more finely punctate than prosternum, with micropunctures; margins and base infuscate, depressed posteriorly. Metasternum with evenly spaced, uniform punctures. Metacoxal plate coarsely punctate laterally, becoming less punctate towards coxal suture; rounded posteriorly; not reaching fourth abdominal segment. Abdominal sternites with fringe of hairs along lateral edges; first visible sternum piceous, coarsely and densely punctured; second visible sternum infuscate; third may be infuscate or brown, the last abdominal sternum testaceous, finely and more densely punctate, with a noticeable slit medially from more than half the length of the segment; apex with long sharp point.
Legs. – Prothoracic leg ( Fig. 12b View Fig ). Coxa oval. Trochanter small, rectangular, subequal to length of tarsomere 1. Femur with dorsal and ventroapical row of spines, few long dorso-apical natatory setae. Tibia slightly shorter than femur, dorsally and ventrally with small spines, apical end with short dorsal natatory setae and stout ventral spines. Tarsus with five segments; tarsomeres without natatory setae; tarsomere 1 subequal to length of tarsomere 2 and 3 combined; tarsomere 2 slightly longer than tarsomere 3; tarsomere 4 with long ventral spines; tarsomere 5 longest tarsal segment with large ventral spines. Pretarsus of two long claws.
Mesothoracic leg ( Fig. 13b View Fig ). Coxa rounded. Trochanter small, rectangular.
Femur with dorsal row of small spines; natatory setae present in cluster at apical end. Tibia slightly shorter than femur, with a dorsal and ventral row of slender spines, long dorso-apical natatory setae, two stout ventro-apical spines. Tarsus with five segments; tarsomere 1 subequal in length to tarsomere 2 and 3 combined, with long ventral natatory setae; tarsomere 2 subequal to tarsomere 4; tarsomere 3 shortest segment; tarsomere 4 with ventral spines; tarsomere 5 longest segment with stout row of ventral spines. Pretarsus of two long claws.
Metathoracic leg ( Fig. 14b View Fig ). Femur with basal end bulbous, remainder long and slender, dorsal and ventro-apical spines. Tibia slender, longest segment, with row of dorsal and ventral slender spines, long stout spines at apical end. Tarsus with five segments; tarsomere 1 with long natatory setae and small spines; tarsomere 2 and 3 with long natatory setae; tarsomere 5 with row of ventral spines. Pretarsus of two long claws.
Female sexual characters. – Tergite VIII ( Fig. 7b View Fig ) triangular, pointed at apex; lateral margins straight. Gonocoxae ( Fig. 8b View Fig ) with 1–2 rows of sparse setae along distal and disto-lateral margins.
Male sexual characters. – Aedeagus ( Fig. 11b View Fig ) with apex of median lobe long, slender with a downward angle; hood lobe pointed. Left paramere ( Fig. 9b View Fig ) with hook-like projection at apex. Right paramere ( Fig. 10b View Fig ) with almost a flat surface at apex.
Larvae
Instar III
Body. – Total body length 11.5–13.0 mm; maximum body width (3 rd abdominal segment) 1–1.2 mm, n512. Elongate, robust. Head brown. Stemmata black. Thoracic and abdominal segments light yellowish-brown. Tergal and sternal sclerites and asperities dark reddish-brown. Thoracic and abdominal pleura whitish-yellow. Leg segments yellowish-brown. Urogomphus yellow.
Head. – Average head length 0.35 mm, average head width 0.75 mm, n512 ( Fig. 15b View Fig ). Lateral margins sinuate.
Mouthparts. – Similar to B. hornii ; mandible ( Fig. 16b View Fig ).
Thorax. – Pronotal tergite rectangular; tergites in ventral view expanding past pleuron ( Fig. 17b View Fig ). Pronotum equal in length to metanotum, longer than mesonotum. Sides of mesothorax each with a ventral spiracle anterolaterad of mesocoxa.
Abdomen. – Segments 1–9 with rectangular tergum and sternum covered in dark asperities. Asperities along posterior margins of segments with four dense clusters; one at posterolateral angle of each tergum and one on each side of midline. Urogomphus similar to that of B. hornii ( Fig. 18 View Fig ) but more densely covered with asperities and with many sensillae at the apex; apex of urogomphus wide and strongly curved.
380 Legs. – Prothoracic leg ( Fig. 25 View Fig ). Coxa longest segment; 16 setae, 13 ancestral and three additional; one anterior campaniform sensilla. Trochanter having seven setae, four ancestral and three additional; five anterior campaniform sensillae and two posterior campaniform sensillae; ventral anterior spinulae. Femur without ventroapical modification; slightly longer than tibia and tarsus combined; 20 setae, five ancestral and 15 additional; one anterior campaniform sensilla; one row of stout ventral anterior spinulae and one row of smaller spinulae. Tibia equal to length of tarsus; six ancestral setae; one posterior campaniform sensilla.
Tarsus having three ancestral setae; ventral posterior spinulae. Pretarsus consisting of one claw; shorter than length of tibia and tarsus combined; with two V setae.
Mesothoracic leg ( Fig. 26 View Fig ). Coxa longest segment; 12 setae, nine ancestral and three additional; one anterior campaniform sensilla. Trochanter having six ancestral setae; five anterior campaniform sensillae and two posterior campaniform sensillae; ventral rows of anterior and posterior spinulae. Femur long, slender, length of tibia and tarsus combined; 22 setae, 10 ancestral and 12 additional; one anterior campaniform sensilla; ventral posterior spinulae. Tibia equal to length of tarsus; eight setae, seven ancestral and one additional; one posterior campaniform sensilla; ventral posterior spinulae. Tarsus having five ancestral setae. Pretarsus consisting of one claw; shorter than length of tibia and tarsus combined; with two V setae.
Metathoracic leg ( Fig. 27 View Fig ). Coxa having 10 setae, nine ancestral and one secondary; one anterior campaniform sensilla. Trochanter having six ancestral setae; five anterior campaniform sensilla and two posterior campaniform sensilla; one area of anterior spinulae proximal, one row of spinulae beside TR 2, one row of posterior ventral spinulae. Femur long, slender; 24 setae, nine ancestral and 15 additional; one anterior campaniform sensilla; four rows of ventral posterior 382 spinulae. Tibia equal to length of tarsus; six ancestral setae; one posterior campaniform sensilla. Tarsus having four ancestral setae; posterior covered in spinulae. Pretarsus consisting of one claw with two V setae.
Distribution
( Figure 29 View Fig ).
This species has only been found in Michigan and Ontario.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
|
Kingdom |
|
|
Phylum |
|
|
Class |
|
|
Order |
|
|
Family |
|
|
Genus |