Lepidocyrtus (Fractocyrtus), Cipola & Bellini, 2018
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publication ID |
https://doi.org/ 10.11646/zootaxa.5369.3.3 |
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publication LSID |
lsid:zoobank.org:pub:B16AF2B9-ADB0-4FA3-BA52-838560C328F5 |
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DOI |
https://doi.org/10.5281/zenodo.10248030 |
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persistent identifier |
https://treatment.plazi.org/id/03B5EB07-8707-FFE2-FF63-F93564F0A7A6 |
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treatment provided by |
Plazi |
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scientific name |
Lepidocyrtus (Fractocyrtus) |
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Subgenus Fractocyrtus Cipola & Bellini, 2018 View in CoL
Type species: Lepidocyrtus amazonaensis Cipola nom. nov. (Fig. 2 View FIGURE )
Diagnosis of subgenus. Antennae, legs (except coxae II–III) and collophore without scales. Antennae shorter than body length (Figs 2 View FIGURE , 6 View FIGURE 6 , 13); Ant IV not annulated and without apical bulb. Four ciliate prelabral chaetae ( Figs 3A View FIGURE 3 ). Th II slightly projected over the head anteriorly (Figs 2, 6, 13). Th II, Th III and Abd IV (laterally) polychaetotic, covered by numerous small ciliated mic interspersed among scales ( Figs 15A View FIGURE 15 , 16B View FIGURE 16 ). Abd III laterally with a tuff of elongated chaetae ( Figs 9A View FIGURE 9 , 16A View FIGURE 16 ). Body psp pattern ( Figs 4–5 View FIGURE 4 View FIGURE 5 , 10 View FIGURE 10 , 17 View FIGURE 17 ): anteriorly to eyepatches (0), clypeus inner (2), Th II–Abd IV (1), coxae I–III (2, 4, 2), proximal manubrium (1), manubrial plate (2) and proximal dens (6–7); lateral psp: Th III–Abd III (0), BP4 variable; ventral psp: as Ant III (1), Ant II (1, rarely 5), Ant I (0), Th I–III (1), collophore anteriorly (1) and posteriorly (1), between collophore and tenaculum (1), tenaculum posteriorly variable, Abd IV (0) and anterior to genital plate (1 unpaired). Unguiculus inner lamella excavate ( Figs 3B View FIGURE 3 , 11E View FIGURE 11 ). Dens dorsally with at least 10 proximal ciliate spines and a large, apically truncate dental tubercle ( Figs 3C View FIGURE 3 , 12C View FIGURE 12 , 18F View FIGURE 18 ). Mucronal spine with small basal spinelet ( Fig. 12D View FIGURE 12 ).
The following characters are shared in four Fractocyrtus species known:
Habitus typical of Lepidocyrtinae (Figs 2, 6, 13); brownish scales weakly ciliate, oval, elongated or pyriform (rarely) and apically rounded, truncate or irregular unilaterally or bilaterally (rarely) present on all head, thorax, abdomen, coxae II–III (lapsus as “absent” in L. (F.) mateosi in Cipola et al. 2018b), and manubrium and dens ventrally (Figs 2, 6, 7E, 11B–C, 12B).
Head. Ant I–IV with numerous finger-shape sens and ciliate chaetae; Ant I dorsally with 3 proximal sens-like smooth chaetae (Ant I organ sensu Ḩther 1986) ( Figs 7B View FIGURE 7 , 14B View FIGURE 14 ). Eyes 8 per side with 5 interocular chaetae (q, v, p, r, t); eyepatches posterior region with 1 bothriotrichum (Pa6) ( Figs 7B View FIGURE 7 , 14B View FIGURE 14 ). Four prelabral chaetae (pl1–2) ciliated and subequals ( Fig. 3A View FIGURE 3 , 7C View FIGURE 7 ). Labral formula with 4 (a1–2), 5 (m0–2), 5 (p0–2) smooth chaetae, a1 moderately thicker, p0–2 largest, others subequals ( Fig. 3A View FIGURE 3 ). Labral papilla absent (lapsus as “present” in Cipola et al. 2018b) ( Fig. 3A View FIGURE 3 ). Maxillary palp with smooth t.a. and b.c.; sublobal plate with 1 minute distal appendix (s.b.4) and 3 inner appendages (s.b.1–3) smooth and subequals ( Fig. 3A View FIGURE 3 ). Labial palp with 5 main papillae (A–E) plus 1 hypostomal papilla (H), with 0, 5, 0, 4, 4, 2 guard appendages, respectively ( Fig. 3A View FIGURE 3 ); papilla E l.p. reduced ( Figs 7D View FIGURE 7 , 14D View FIGURE 14 ). Labial palp with 5 subequal smooth p.c.; basolateral and basomedian labial fields with chaetae a1–5 smooth on anterior row (a2 largest), M2, E and L1–2 ciliate (M1 absent), r reduced to a spine-like mic ( Figs 7E View FIGURE 7 , 14E View FIGURE 14 ).
Dorsal trunk chaetotaxy. Th II–Abd IV macrochaetotaxy formula with 0, 0| 0, 1+1, 0, 2 mac; Th II–Abd V with ms and sens formula 1,0|1,0,1,0,0 and 1, 1| 0,1, 1,+,3, respectively ( Figs 8–9 View FIGURE 8 View FIGURE 9 , 15–16 View FIGURE 15 View FIGURE 16 ). Abd II–IV bothriotrichal formula 2 (a5, m2), 3 (a5, m2, m5), 2 (T2, T4) ( Figs 8D View FIGURE 8 – 9B View FIGURE 9 , 15D View FIGURE 15 – 16B View FIGURE 16 ).
Legs. Tibiotarsus I–III outer side distally with 1 tenent hair finely ciliate and apically capitate, inner side of tibiotarsus III with 1 smooth chaeta ( Fig. 3B View FIGURE 3 ). Pretarsus with one anterior and one posterior small chaeta ( Fig. 11E View FIGURE 11 ). Unguis I–III outer side with 2 paired lateral teeth and 1 unpaired proximal medial tooth; inner edge with 4 teeth, 2 paired b.t., 1 unpaired m.t. subequal to b.t. and 1 unpaired a.t. slightly smaller; unguis I–II b.t. on proximal fifth, m.t. on proximal half and a.t. on distal fifth; unguis III b.t. on a little less than proximal half, m.t. on proximal third and a.t. on distal sixth ( Figs 3B View FIGURE 3 , 11E View FIGURE 11 ). Unguiculus I–III with 4 lamellae (ai, ae, pi, pe) acuminate and smooth, except pe serrate and ai weakly excavate (lapsus as “truncate” in Cipola et al. 2018b) strongly on I–II and less on III ( Figs 3B View FIGURE 3 , 11E View FIGURE 11 ).
Furcula. Manubrium ventrally with 3 inner ciliate chaetae, 1 outer chaeta somewhat larger (as “subequal” in L. (F.) mateosi in Cipola et al. 2018b) than the others ( Figs 12B View FIGURE 12 , 18F View FIGURE 18 ). Dens dorsally with a large, apically truncate dental tubercle ( Figs 3C View FIGURE 3 , 12C View FIGURE 12 ); ventral side distally with at least 1 lanceolate ciliate chaeta ( Fig. 12D View FIGURE 12 ). Mucro bidentate with distal tooth larger than proximal tooth, mucronal spine surpassing apex of proximal tooth and with 1 small basal spinelet ( Fig. 12D View FIGURE 12 ).
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.