Sinella yosiia Bellinger& Christiansen, 1974

Wu, Jun, Yan, Qibao & Zhang, Feng, 2016, Supplementary descriptive notes of the Sinella and Coecobrya (Collembola: Entomobryidae) species from North America, Hawaii and Japan, Zootaxa 4085 (4) : -

Sinella yosiia Bellinger& Christiansen, 1974

Figs 43–51

Sinella (Sinella) yosiia Christiansen & Bellinger, 1992

Type locality. Kazumura cave, Mountain View , Hawaii.

Material examined. One specimen on slide, Hawaii: Puna : Paradise Park Cave , 05.i.1982, deep zone, 175m, Howarth leg. (# 5408); three specimens on slides, Hawaii: Orchid Land Estates Caves, 18.ii.1974, Howarth leg. (# 5435); one specimen on slide, Hawaii: Maui, Waikau Cave: Koolau Gap, 04.xii.1976, deep zone, 1980m, Howarth leg. (# 5440); one specimen on slide, Hawaii: Maui, Waikau lava tube, 26.v–21.vi.1976, dark zone, 1980 m, Howarth leg. (# 5480). Deposited in CARC .

Additions to original description. Eyes usually 6+6; additional two (G and H) seen in one specimen. Dorsal cephalic chaetotaxy with 5 antennal (An), 4 median (M), and 5 sutural (S) ( Fig. 43 ). Lateral process of labial palp slightly thicker than normal chaetae, with tip not reaching apex of labial papilla ( Fig. 44 ). Subapical chaeta of maxillary outer lobe slightly larger apical one; 3 smooth sublobal hairs on maxillary outer lobe. Labial chaetae as m 1m 2rel1l2, all smooth; chaeta r 0.68 length of chaeta m; a smooth chaeta between m2 and r present only in one side of one specimen; chaetae X, X2–4 ciliate except X3 smooth in one specimen ( Fig. 45 ). Manubrial plaque with 2 pseudopores and 6–8 ciliate chaetae ( Fig. 46 ). Mucro bidentate with two teeth subequal ( Fig. 47 ). Th.II with 4 (m1, m2, m 2i, m 2i 2) medio-medial, 5 (m4, m 4i, m4p, m4pi, m4pi2) medio-lateral, and 23–34 mac; mac m4pi2 sometimes absent; mac p5pi present only in one specimen; p4, p 4i, p4p and p5 as mac ( Fig. 48 ). Th.III with 40–45 mac and 5 (m5, m 5i, a6, a 6i, a6e) mac in Gr. III; mac a6e, m 7i, m 7i 2, m6a often absent ( Fig. 49 ). Abd.I with 8(7) (m2–4, m 2i, a2, a3, a5) mac. Abd.II with 6(5) (a2, a3, m3, m3e, m3ea, m3ep) central and 1 (m5) lateral mac; mac m3ea often absent. Abd.III with 3 (a2, a3, m3) central and 3 (am6, pm6, p6) lateral mac ( Fig. 50 ). Abd.IV with 7– 8 (I, A5, A5p, A6, B4–6, M) central and 12–18 lateral mac; mac a5p often absent ( Fig. 51 ).

Ecology. Known from caves except a single surface record.

Distribution. Hawaii.

Remarks. This species can be easily distinguished from other 6+6 eyed Sinella species. It differs from S. jugoslavica Loksa & Bogojević, 1970 in the pointed and short tenent hair and the presence of a small outer tooth on unguiculus and the absence of an antennal apical bulb, and from S. siva ( Imms, 1912) in the number of ungual inner teeth and tenent hair. Actually, the presence of small eyes G and H in several specimens indicates that this species may have complete 8+8 eyes. Unfortunately, eye details could not be traced by SEM photos obtained by Chen and Christiansen. Thus, S. yossia probably belong to Entomobryoides Maynard due to its “smooth” inner tibiotarsal differentiated chaetae and absence of antennal apical bulb.

Figures

FIGURES 43 – 51. S. yosiia: 43, dorsal cephalic chaetotaxy; 44, lateral process of labial palp; 45, ventral chaetae of head; 46, manubrial plaque; 47, mucro; 48 ‒ 51, dorsal body chaetotaxy; 48, Th. II; 49, Th. III; 50, Abd. I ‒ III; 51, Abd. IV.