Phytoliriomyza megacerotis Kato, 2022
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publication ID |
https://dx.doi.org/10.3897/zookeys.1133.94530 |
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publication LSID |
lsid:zoobank.org:pub:D7A37FE0-DC2A-4ECC-A6A1-0E873C7C7A5A |
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persistent identifier |
https://treatment.plazi.org/id/658789E1-B6A7-464B-B701-5D17528CC4E3 |
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taxon LSID |
lsid:zoobank.org:act:658789E1-B6A7-464B-B701-5D17528CC4E3 |
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treatment provided by |
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scientific name |
Phytoliriomyza megacerotis Kato |
| status |
sp. nov. |
38. Phytoliriomyza megacerotis Kato sp. nov.
Figs 72 View Figure 72 , 73 View Figure 73
Material examined.
Holotype: Japan: 1♂ (MK-AG-a417), Kotonotaki, Susami, Wakayama Pref. (33.5639°N, 135.5437°E, 200 m asl), 24-III-2020 (as larva), emerged on 1-V-2020, NSMT-I-Dip 32114. Paratypes: Japan: 1♂2♀ (MK-AG-a479, a480, a14), same data as holotype, emerged on 30-IV-2-V-2020, NSMT-I-Dip 32115-32117; 1♀ (MK-AG-146), Tashiro, Kinko, Kimotsuki, Kagoshima Pref., 22-III-2015 (as larva), emerged on 1-V-2015, NSMT-I-Dip 32118; 1♂1♀ (MK-AG-154, a15), Yasukawa-keikoku, Tanabe, Wakayama Pref., 31-VII-2015 (as larva), emerged on 3-IX-2015, NSMT-I-Dip 32119-32120.
Other material.
Japan: 8♂9♀, Kotonotaki, Susami, Wakayama Pref., 24-III-2020 (as larva), emerged on 31-I-2-V-2020; 16♂28♀, Yasukawa-keikoku, Tanabe, Wakayama Pref., 31-VII-2015 (as larva), emerged on 25-VIII-2-IX-2020; 1♀, Wadagawa-kyo, Kumanogawa, Shingu, Wakayama Pref., 7-VII-2021 (as larva), emerged on 18-VIII-2021; 9♂25♀, Tashiro, Kinko, Kimotsuki, Kagoshima Pref., 22-III-2015 (as larva), emerged on 30-IV-30-IV-10-V-2020; 1♀, Isso, Yaku Is., Kumage, Kagoshima Pref., 29-III-2017 (as larva), emerged on 12-V-2021.
Diagnosis.
A small species (wing length 1.2-1.4 mm) having a pruinose gray scutum and scutellum, black 1st flagellomere, black maxillary palpus, dark gray halteres, and dark gray legs. Male epandrium inner-basally with a comb comprising five or six fused long tubercle-like setae; surstylus with a comb comprising five or six fused long tubercle-like setae. Larva mines the thallus of a riparian hornwort, Megaceros flagellaris .
Description.
Adult male (Fig. 72A-E View Figure 72 ).
Head: Head dark yellow, with ocellar tubercle dark brown, and back of head dark brown excluding margins (Fig. 72C View Figure 72 ). Antenna porrect; first flagellomere black, pedicel and scape brown (Fig. 72B View Figure 72 ). Arista subbasal, brown, pubescent. Frons brownish yellow, with reflective pruinosity. Clypeus narrow, brown with apical half yellow; slightly protruding. Face, gena, parafacial and postgena dark yellow (Fig. 72C View Figure 72 ). Proboscis normal, light yellow; palpus dark brown, cylindrical. Chaetotaxy: Front orbitals three pairs; one ori directed inward; two ors directed upward (Fig. 72B View Figure 72 ). Orbital setulae minute and proclinate, in a single row.
Thorax: Thorax pruinose, dark gray. Scutum pruinose, dark brown; scutellum pruinose, brown; subscutellum light yellow (Fig. 72D View Figure 72 ). Mediotergite subshiny, dark brown, anatergite and katatergite brown (Fig. 72E View Figure 72 ). Pleuron largely dark yellow; postpronotal lobe with anterior brown patch; propleuron with a small brown patch on anterior corner; notopleuron yellowish brown; anepisternum dark yellow with lower-half yellowish brown; anepimeron with anterior brown patch; katepisternum and meron with large brown patches on venter (Fig. 72B View Figure 72 ). Haltere brown. Calypter margin and hairs gray. Leg segments dark brown; tibia and tarsus darker (Fig. 72A View Figure 72 ); distal half of coxa and basal half of femur of foreleg pale yellow frontally (Fig. 72C View Figure 72 ). Chaetotaxy: Scutum with 1+3 dorsocentrals, shortened anteriorly (Fig. 72D View Figure 72 ). Acrostichal setae two or three pairs in two rows. Wing: Wing length 1.2 mm, costa reaching M1 (Fig. 72A View Figure 72 ). Length of ultimate section of vein M4 divided by penultimate section 1.6-1.8.
Abdomen: Abdomen dorsally subshiny brown; epandrium brown (Fig. 72E View Figure 72 ). Genitalia: (Fig. 72G-J View Figure 72 ) Epandrium rounded apically; distal margin with several long setae; inner-basal margin with a comb comprising five or six fused dark long tubercle-like setae (Fig. 72H View Figure 72 ). Surstylus rounded, apically with a comb comprising five or six fused dark long tubercle-like setae (Fig. 72H View Figure 72 ). Cercus narrow, setose. Subepandrial sclerite dark, with a pair of pale, elongated, fused, plate-like dorsal lobes (Fig. 72H View Figure 72 ). Hypandrium thin, sclerotized along outer margin (Fig. 72G View Figure 72 ). Postgonite bare, goose barnacle-shaped, cleft apically (Fig. 72G View Figure 72 ). Phallophorus with deep incision below, articulated with phallapodeme, fused to epiphallus (Fig. 72J View Figure 72 ). Basiphallus membranous, with dorsal surface sclerotized. Hypophallus small, with a pair of asymmetrical narrow sclerites; the left one is longer than the right one (Fig. 72G, J View Figure 72 ). Paraphallus absent. Mesophallus cylindrical, with a pair of dorsolateral sclerites (Fig. 72J View Figure 72 ). Distiphallus comprising one pair of tubules; the tubules adjoining only at the base, tapering toward tip, with outer-lateral sides pigmented, extending up to half point of phallapodeme, becoming paler apically (Fig. 72J View Figure 72 ). Ejaculatory apodeme brownish, spatula-shaped with short, broad stalk; base dark and wide to one side; sperm pump clear (Fig. 72I View Figure 72 ).
Female (Fig. 72F View Figure 72 ). Similar to male, but larger, frons wider. Wing length 1.4 mm. Postabdomen: (Fig. 72K, L View Figure 72 ) Oviscape dark brown, setigerous (Fig. 72K View Figure 72 ). Tergite 10 cruciform, laterally uniting narrow pleural sclerites (Fig. 72L View Figure 72 ). Each cercus with two stout, apical, trichoid sensilla, 1/2 length of cercus (Fig. 72L View Figure 72 ). Spermathecae semi-orbicular, with truncate proximal ends (Fig. 72K View Figure 72 ).
Immatures. (Fig. 73D View Figure 73 ) Puparium internal, slender, brown, and slightly flattened, with posterior 1/3 tapering.
Etymology.
The specific name refers to the host plant genus Megaceros .
Japanese name.
Ananashitsunogoke-hamoguribae.
Host plant.
Megaceros flagellaris ( Dendrocerotaceae ).
Mine.
Larvae construct linear-blotch mines in the thallus, and pupate in and rarely out of the mines (Fig. 73C-E View Figure 73 ).
Biological notes.
The habitats of this species are watersides along river banks or near water fall in warm temperate evergreen forests dominated by Castanopsis sieboldii (Fig. 73B View Figure 73 ), and is unique in that the host hornworts are always wet due to splashed water (Fig. 73A View Figure 73 ). Our rearing records suggest that this species is at least bivoltine, with adults emerging in May and August.
Distribution.
Japan: Honshu, Kyushu and Yaku Island (Fig. 71 View Figure 71 ).
Remarks.
This species resembles P. suetsugui and P. ricciae in having a wholly dark scutum and dark maxillary palpus, but is distinguished from them by the color of the pedicel and scape of the antenna (dark in P. megacerotis ; yellow in P. suetsugui and P. ricciae ).
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.