Ischnothyreus

Richard, Miguel, Graber, Werner & Kropf, Christian, 2016, The goblin spider genus Ischnothyreus (Araneae, Oonopidae) in Java and Sumatra, Zootaxa 4151 (1), pp. 1-99 : 6-7

Key to the species of Ischnothyreus from Java and Sumatra

Key for females:

1. small lateral sclerites of postepigastric scutum present (e. g. Figs. 15 A, 68B)....................................... 2

- small lateral sclerites absent (e. g. Fig. 35 G)................................................................ 4

2. posterior spiracles connected by groove ( Fig. 68 B)............................................ I. obscurus sp. nov.

- posterior spiracles not connected by groove, (e. g. Fig. 15 A)....................................................3

3. dorsal scutum weakly sclerotized and covering less than half of length of abdomen, postepigastric scutum less than twice as wide as long, winding tube elongated ( Figs. 75 C–E)....................................... I. serpentinum Saaristo

- dorsal scutum more sclerotized and covering more than half of length of abdomen, postepigastric scutum more than twice as wide as long ( Fig. 15 A).................................................................. I. ligulatus sp. nov.

4. eyes reduced in size ( Fig. 60 D)...................................................... I. microphthalmus sp. nov.

- eyesize normal ( Fig. 1 D–F).............................................................................. 5

5. dorsal scutum very small and weakly sclerotized ( Figs. 51 E–H)................................... I. lucidus sp. nov.

- dorsal scutum longer than half of abdomen ( Fig. 35 F)......................................... I. concavus sp. nov.

Figures

FIGURE 1. Ischnothyreus baltenspergerae sp. nov. Male: A, habitus, dorsal view; B, habitus, lateral view; C, habitus, ventral view; D, carapace, frontal view; E, carapace, lateral view; F, carapace, dorsal view; G, sternum, ventral view. Scale bar: A = 1 mm.

FIGURE 15. Ischnothyreus ligulatus sp. nov.: A, B, C, E, female genital area, ventral view; D, dorsal view. a, apodeme; ls, lateral sclerite; nsp, nail-shaped projection; o, opening of apodeme; s, stigma; wt, winding tube. Scale bars: A, E = 0.2 mm; C = 0.1 mm.

FIGURE 35. Ischnothyreus concavus sp. nov. Female: A, habitus, dorsal view; B, habitus, lateral view; C habitus, ventral view; D, carapace, frontal view; E, opisthosoma, lateral view; F, opisthosoma, dorsal view; G, opisthosoma, ventral view. Scale bar: A = 1 mm.

FIGURE 51. Ischnothyreus lucidus sp. nov. Female: A, habitus, dorsal view; B, habitus, lateral view; C habitus, ventral view; D, carapace, frontal view; E, opisthosoma, dorsal view; F, opisthosoma, ventral view; G, opisthosoma, lateral view. H, opisthosoma, frontal view. Scale bar: A = 1 mm.

FIGURE 60. Ischnothyreus microphthalmus sp. nov. Female: A, habitus, dorsal view; B, habitus, ventral view; C habitus, lateral view; D, carapace, dorsal view; E, sternum, ventral view; F, opisthosoma, ventral view; G, postepigastric scutum, ventral view. Scale bar: A = 1 mm.

FIGURE 68. Ischnothyreus obscurus sp. nov. Female: A, leg I; B, D, F, genital area, ventral view; C, genital area, dorsal view; E, row of pores, ventral view. a, apodeme; f, funnel; ls, lateral sclerite; o, opening of apodeme; po, pores; ps, paddle-like sclerite; s, stigma; wt, winding tube. Scale bars: B, C, F = 0.15 mm; D = 0.1 mm; E = 20 µm.

FIGURE 75. Ischnothyreus serpentinum Female: A, leg I; B, leg II; C, D, E, genital area ventral view. D, drawing from Saaristo 2001. a, apodeme; ls, lateral sclerite; o, opening of apodeme; p, process; s, stigma; wt, winding tube. Scale bars: A, B = 1 mm; C, D, E = 0.2 mm.