Barretthydrus tibialis Lea, 1927
publication ID |
https://doi.org/ 10.1649/0010-065X-72.4.639 |
DOI |
https://doi.org/10.5281/zenodo.5195393 |
persistent identifier |
https://treatment.plazi.org/id/8F69AC09-C70D-FF91-D320-FDDECB6D1706 |
treatment provided by |
Carolina |
scientific name |
Barretthydrus tibialis Lea, 1927 |
status |
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Barretthydrus tibialis Lea, 1927 View in CoL
( Figs. 1–14 View Figs View Figs View Figs View Figs , 16–19 View Figs View Figs )
Source of Material. Larvae were collected in association with adults at the following localities: Australia, New South Wales, 20 km North of Nelligan, 15-VIII.1997, coll. C. H. S. Watts; Sardine Creek, 30 km North of Orbost V, 30-XI-1998, C. H. S. Watts leg.
Diagnostic Combination (Instar III). The third instar of B. tibialis can easily be distinguished from that of the closely similar B. geminatus by the presence of a broad, blackish macula on the anterior portion of the frontoclypeus ( Fig. 16 View Figs ) in addition to a relatively shorter head capsule compared to the length of abdominal segment VIII (HL/LAS <4.50 compared to>4.60) and a larger total number of secondary setae on selected leg articles ( Table 3 View Table 3 ).
Instar I
( Figs. 1–12 View Figs View Figs View Figs View Figs )
Description. Color: [Not available owing to the bad state of preservation of the only specimen available.] Body: Measurements and ratios that characterize the body shape in Table 1 View Table 1 . Head: Head capsule as in Figs. 1–2 View Figs , HL = 0.60 mm, HL/LAS = 4.61. Abdomen: As in Figs. 10–11 View Figs , U 1 View Figs = 0.75 mm; U1/HW = 1.55.
Instar II
No specimen available for study.
Instar III
( Figs. 13–14 View Figs , 16–19 View Figs View Figs )
Description. Color: Head capsule predominantly yellow; frontoclypeus with a broad, black, subapical macula ( Fig. 16 View Figs ); head appendages dark yellow; thoracic tergites dark brown; abdominal tergites I, IV – VII dark brown, II and III dark yellow to pale brown and VIII pale yellow; urogomphi dark yellow to pale brown; legs dark brown proximally, pale yellow distally. Body: Measurements and ratios that characterize the body shape in Table 1 View Table 1 . Head: Head capsule as in Fig. 16 View Figs , HL = 1.24–1.30, HL/LAS <4.50. Abdomen: U1 = 1.51–1.69 mm, U1/HW = 1.56–1.67 ( Fig. 19 View Figs ). Chaetotaxy: ProFE with more than 52 secondary setae; mesoFE with more than 56 secondary setae; mesoTI with more than 47 secondary setae; mesoTA with more than 34 secondary setae; metaCO with more than 26 secondary setae; metaFE with more than 66 secondary setae; metaTI with more than 50 secondary setae; metaTA with more than 43 secondary setae.
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.
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