Larinia, Simon, 1874

Framenau, Volker W. & Castanheira, Pedro De S., 2022, Two new species in the orb-weaving spider genus Larinia Simon, 1874 (Araneae, Araneidae) from Western Australia, Zootaxa 5092 (3), pp. 350-360 : 352

Key to the species of Larinia in Australia

The use of this keys requires reference to images in Framenau & Scharff (2008).

1 Carapace much higher in thoracic region than in cephalic region, with deep longitudinal fovea ( Framenau and Scharff 2008, fig. 50)........................................................................................ L. delicata

- Carapace of equal height over its whole length.............................................................. 2

2 Males .............................................................................................. 3

- Females............................................................................................ 8

3 Femur IV of males without baso-ventral spines; median apophysis with two neighbouring, apically directed spines ( Figs 1B , 4B ; Framenau & Scharff 2008, fig. 29).................................................................... 4

- Femur IV of males with two (rarely one or three) baso-ventral spines ( Framenau & Scharff 2008, figs. 2, 13, 37)......... 6

4 Abdomen at least 3 times as long as wide ( Framenau & Scharff 2008, fig 23)............................. L. phthisica

- Abdomen less than 3 times as long as wide ( Figs 1A , 4A )..................................................... 5

5 Body length more than 4 mm; apical spines of median apophysis very strong ( Figs 1C , 3A )............... L. sexta n. sp.

- Body length less than 3 mm; apical spines of median apophysis weak ( Fig 4C , 6A ).................... L. tumulus n. sp.

6 Median apophysis almost rectangular in ventral view ( Framenau & Scharff 2008, fig. 17), without apical hook or keel............................................................................................... L. montagui

- Median apophysis of variable shape, with apical keel ( Framenau & Scharff 2008, fig. 6) or apically directed hook-shaped process ( Framenau & Scharff 2008, fig. 41)................................................................ 7

7 Median apophysis with keel ( Framenau & Scharff 2008, fig. 6)....................................... L. jamberoo

- Median apophysis with apically directed hook shaped process ( Framenau & Scharff 2008, fig. 41)............. L. tabida

8 Epigynum with scape (i.e., only connected to epigynum anteriorly) ( Framenau & Scharff 2008, figs 30, 43), which is almost always broken off (figs 2C, 3C, 5C, 6C; Framenau & Scharff 2008, fig. 32)....................................... 9

- Epigynum with median septum (i.e., central structure. that is connected to epigynum over its whole length), never broken off ( Framenau & Scharff 2008, figs 7, 18)................................................................... 11

9 Abdomen at least 3 times as long as wide ( Framenau & Scharff 2008, figs 25, 38)................................ 10

- Abdomen less than 3 times as long as wide ( Figs 2A , 5A ).................................................... 12

10 Rim of epigynum distinct almost all around and comparatively narrow ( Framenau & Scharff 2008, fig. 43); outline of scape (if present) drop-shaped ( Framenau & Scharff 2008, fig. 43).............................................. L. tabida

- Rim of epigynum distinct mainly along posterior margin and comparatively wide ( Framenau & Scharff 2008, figs 30, 32); scape (if present) with almost parallel lateral margins slightly narrowing posteriorly ( Framenau & Scharff 2008, fig. 30).............................................................................................. L. phthisica

11 Median septum indistinct, wider anteriorly than posteriorly; epigynum somewhat nose-shaped ( Framenau & Scharff 2008, fig. 7)........................................................................................ L. jamberoo

- Median septum wider posteriorly than anteriorly ( Framenau & Scharff 2008, fig. 18)..................... L. montagui

12 Body length more than 5 mm; epigynum with pronounced median septum ( Figs 2C , 3D )................. L. sexta n. sp.

- Body length less than 4 mm; epigynum without median septum ( Figs 5C , 6D )........................ L. tumulus n. sp.

Figures

FIGURE 1. Larinia sexta n. sp., holotype male (WAM T80638).A, Dorsal habitus. B, Ventral habitus. C, Left pedipalp, dorsomesal view. D, Left pedipalp, meso-ventral view. Scale bars: A, B, 1 mm; C, D, 0.25 mm.

FIGURE 2. Larinia sexta n. sp., female (WAM T77403). A, Dorsal habitus. B, Ventral habitus. C, Epigynum, ventral view. D, Cleared epigynum, dorsal view. E, Cleared epigynum, ventral view. Scale bars: A, B, 1 mm; C–E, 0.2 mm.

FIGURE 3. Larinia sexta n. sp., holotype male (WAM T80638) and female (WAM TT80639) genitalia. A, Left male pedipalp, dorso-mesal view. B, Left male pedipalp, meso-ventral view. C, Cleared epigynum, dorsal view. D, Epigynum, ventral view. Scale bars: A, B, 0.25 mm; C, D, 0.2 mm.

FIGURE 4. Larinia tumulus n. sp., holotype male (WAM T153634). A, Dorsal habitus. B, Ventral habitus. C, Left pedipalp, dorso-mesal view. D, Left pedipalp, meso-ventral view. Scale bars: A, B, 0.5 mm; C, D, 0.1 mm.

FIGURE 5. Larinia tumulus n. sp., female (WAM T153635).A, Dorsal habitus. B, Ventral habitus; C, Epigynum, ventral view. D, Cleared epigynum, dorsal view. E, Cleared epigynum, ventral view. Scale bars: A, B, 1 mm; C–E, 0.05 mm.

FIGURE 6. Larinia tumulus n. sp. holotype male (WAM T153634) and female (WAM T153635) genitalia. A, Left male pedipalp, dorso-mesal view. B, Left male pedipalp, meso-ventral view. C, Cleared epigynum, dorsal view. D, Epigynum, ventral view. Scale bars: A, B, 0.1 mm; C, D, 0.05 mm.