Rheocricotopus brochus

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Liu W, Lin X, Wang X (2014) A review of Rheocricotopus (Psilocricotopus) chalybeatus species group from China, with the description of three new species (Diptera, Chironomidae). ZooKeys 388 : 17–34, doi. Versioned wiki page: 2014-03-12, version 42624, https://species-id.net/w/index.php?title=Rheocricotopus_brochus&oldid=42624 , contributors (alphabetical order): Pensoft Publishers.

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BibTeX:

@article{Liu2014ZooKeys388,
author = {Liu, Wenbin, Lin, Xiaolong AND Wang, Xinhua},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {A review of Rheocricotopus (Psilocricotopus) chalybeatus species group from China, with the description of three new species (Diptera, Chironomidae)},
year = {2014},
volume = {388},
issue = {},
pages = {17--34},
doi = {10.3897/zookeys.388.6316},
url = {http://www.pensoft.net/journals/zookeys/article/6316/abstract},
note = {Versioned wiki page: 2014-03-12, version 42624, https://species-id.net/w/index.php?title=Rheocricotopus_brochus&oldid=42624 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - A review of Rheocricotopus (Psilocricotopus) chalybeatus species group from China, with the description of three new species (Diptera, Chironomidae)
A1 - Liu W, Lin X
A1 - Wang X
Y1 - 2014
JF - ZooKeys
JA -
VL - 388
IS -
UR - http://dx.doi.org/10.3897/zookeys.388.6316
SP - 17
EP - 34
PB - Pensoft Publishers
M1 - Versioned wiki page: 2014-03-12, version 42624, https://species-id.net/w/index.php?title=Rheocricotopus_brochus&oldid=42624 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.388.6316

Wikipedia/ Citizendium:

<ref name="Liu2014ZooKeys388">{{Citation
| author = Liu W, Lin X, Wang X
| title = A review of Rheocricotopus (Psilocricotopus) chalybeatus species group from China, with the description of three new species (Diptera, Chironomidae)
| journal = ZooKeys
| year = 2014
| volume = 388
| issue =
| pages = 17--34
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.388.6316
| url = http://www.pensoft.net/journals/zookeys/article/6316/abstract
| pmc =
| accessdate = 2019-06-20

}} Versioned wiki page: 2014-03-12, version 42624, https://species-id.net/w/index.php?title=Rheocricotopus_brochus&oldid=42624 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Diptera
Familia: Chironomidae
Genus: Rheocricotopus

Name

Rheocricotopus brochus Liu, Lin & Wang, 2014 sp. n.Wikispecies linkZooBank linkPensoft Profile

Diagnosis

The adult male can be distinguished from known species of the species group and the genus by the following combination of characters: crista dorsalis tooth-liked; tergites I, II and IV yellow, tergite III mainly yellow with a brown circular area, other tergites brown.

Description

Male imago (n = 12)
Total length 1.75–2.70, 2.18 mm. Wing length 1.25–1.60, 1.33 mm. Total length/wing length 1.35–1.78, 1.68. Wing length/length of profemur 1.76–2.31, 2.04.
Coloration. Head and thorax brown. Tergites (Fig. 1) I, II and IV yellow, tergite III mainly yellow but having a brown circular area, other tergites brown. Head. AR 0.63–0.89, 0.72. Ultimate flagellomere 245–360, 284 μm long. Temporal setae 4–7, 5, including 1–3, 2 inner verticals; 1–3, 2 outer verticals and 0–2, 1 postorbital. Clypeus with 7–10, 8 setae. Cibarial pump, tentorium and stipes as in Fig. 2. Tentorium 75–140, 123 μm long, 13–25, 19 μm wide. Stipes 100–125, 118 μm long, 8–10, 8 μm wide. Palpomere lengths (in μm): 20–25, 23; 38–55, 47; 90–130, 105; 110–138, 120; 205–250, 232. L: 5th/3rd 1.92–2.67, 2.23. Third palpal segment with 2 sensilla clavata.
Wing (Fig. 3). Anal lobe reduced. VR 1.06–1.13, 1.07. Costal extension 45–65, 51 μm long. Brachiolum with 1 seta. R with 3–6, 5 setae. Remaining veins bare. Squama with 1–2, 2 setae.
Thorax (Fig. 4). Antepronotum with 2–4, 4 lateral setae. Dorsocentrals 5–7, 6; acrostichals 9–13, 11; prealars 2–3, 3. Scutellum with 2–4, 4 setae. Humeral pit moderately large, ovoid.
Legs. Spur of fore tibia 23–40, 35 μm long; spurs of mid tibia 13–25, 15 μm and 10–18, 12 μm long; spurs of hind tibia 38–50, 41 μm and 10–20, 15 μm long. Hind tibial comb with 9–12, 10 spines, 20–48, 31μm long. Width at apex of fore tibia 35–45, 41 mm, of mid tibia 33–45, 41 mm, of hind tibia 30–45, 38 mm. Lengths (in μm) and proportions of legs as in Table 1.

Table 1. Lengths (in μm) and proportions of legs of Rheocricotopus (Psilocricotopus) brochus sp. n.
P1 P2 P3
fe 530–924, 662 530–800, 713 570–820, 629
ti 640–860, 713 530–690, 670 660–870, 724
ta1 570–770, 618 330–450, 362 410–550, 446
ta2 310–420, 343 150–200, 161 180–260, 205
ta3 210–300, 240 100–130, 110 150–210, 169
ta4 150–200, 163 50–120, 63 70–100, 83
ta5 70–95, 81 55–70, 57 60–80, 69
LR 0.83–0.90, 0.88 0.61–0.65, 0.63 0.60–0.63, 0.61
BV 2.32–2.52, 2.41 3.94–4.62, 4.10 3.30–3.49, 3.42
SV 2.07–2.32, 2.20 3.11–3.48, 3.26 2.95–3.07, 3.02
BR 2.00–4.00, 2.98 1.57–3.00, 2.51 2.25–3.25, 2.67
Hypopygium (Figs 5–6). Anal point tapering to apex, 33–41, 37 μm long, 25–50, 37 μm wide in base, with 3–4, 4 lateral setae in each side. Laterosernite IX with 1–3, 2 setae. Phallapodeme 35–68, 55 μm long. Transverse sternapodeme 35–88, 59 μm long. Gonocoxite 138–191, 157 μm long. Superior volsella triangular, 20–40, 31 μm long, with 5–8, 7 setae. Gonostylus 60–75, 66 μm long. Megaseta 9–13, 11 μm long. Crista dorsalis tooth-shaped. HR 2.11–2.60, 2.38. HV 2.59–3.60, 3.31.

Type material

Holotype: ♂ (BDN. C11A32), China, Zhejiang Province, Yueqing City, Lingdi County, Jiulong Village, 28°31'00"N, 120°96'00"E, 18.iv.2011, sweeping, Lin XL. Paratypes (11): 4♂♂, as holotype; 6♂♂, Hubei Province, Hefeng County, 29°91'00"N, 110°03'00"E, 16.vii.1999, light trap, Ji BC; 1♂, Jiangxi Province, Wuyi Mountain National Nature Reserve, 27°48'11"N, 117°39'30"E, 13.vi.2004, light trap, Yan CC.

Etymology

The specific name is an adjective, from Latin brochus, meaning tooth, referring to tooth-shaped crista dorsalis.

Remarks

The new species resembles Rheocricotopus (Psilocricotopus) bifasciatus Wang & Zheng, 1991 and Rheocricotopus (Psilocricotopus) insularis Makarchenko & Makarchenko, 2005 in the following combination of characters: anal point long, pointed distally; wing anal lobe reduced; crista dorsalis tooth-shaped. But the new species can be separated from the latter species in the basis following combination of characters in Table 2.

Table 2. Main differences between Rheocricotopus (Psilocricotopus) brochus sp. n., Rheocricotopus (Psilocricotopus) bifasciatus and Rheocricotopus (Psilocricotopus) insularis.
Rheocricotopus (Psilocricotopus) brochus sp. n. Rheocricotopus (Psilocricotopus) bifasciatus Rheocricotopus (Psilocricotopus) insularis
AR 0.63–0.89, 0.72 0.90 0.71–0.74
Length of costal extension 45–65, 51 μm 83 μm 96 μm
Squama 1–2, 2 setae 2 setae 8 setae
Shape of humeral pit medium, oviod large, rounded oviod
Tergite coloration TI, II, IV yellow, TIII with a brown circular area, others brown TI, II, IV yellow, others brown all tergites brown
Female and immature stages unknown.

Original Description

  • Liu, W; Lin, X; Wang, X; 2014: A review of Rheocricotopus (Psilocricotopus) chalybeatus species group from China, with the description of three new species (Diptera, Chironomidae) ZooKeys, 388: 17-34. doi

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