Fortuynia rotunda Marshall & Pugh, 2002

Fortuynia rotunda Marshall & Pugh, 2002 View in CoL

Larva

(N = 1): length 262 µm.

Prodorsum (7B). Interlamellar and exobothridial seta minute.

Gastronotic region ( Figure 7 View Figure 7 (b)). Eleven pairs of smooth spiniform notogastral setae; c 1-3, da, dm, dp, la, lm, lp, h 1-2. Anterior notogastral setae (50–55 µm) three times longer than posterior notogastral setae (12–15 µm). Transversal ridge on centrodorsal plate passing posterior line of setae lm and dm medially incomplete.

542 T. PFINGSTL ET AL.

Podosoma and venter. Epimeral setation 2-1-2. Claparède’s organ globular, nearly completely covered by epimeral cuticle. Aggenital, genital, adanal and anal setae not developed. Legs. Setation and solenidia see Table 3.

Protonymph

(N = 1): length 350 µm.

Gastronotic region. Fifteen pairs of simple notogastral setae; c 1-3, da, dm, dp, la, lm, lp, h 1-3, p 1-3. Anterior notogastral setae (65–70 µm) approx. twice as long as posterior notogastral setae (25–30 µm).

Podosoma and venter ( Figure 7 View Figure 7 (c)). Epimeral setation 3-1-2-1. One pair of short genital setae (11 µm). Adanal and anal setae not developed. Legs. Setation and solenidia are shown in Table 3.

Deutonymph unknown

Tritonymph

(N = 1): length 544 µm.

Gastronotic region ( Figure 7 View Figure 7 (d)). Fifteen pairs of notogastral setae (30–100 µm), no conspicuous difference to protonymph.

Podosoma and venter. Epimeral setation 3-1-3-2, seta 3 c added in this stage, close to trochanter III. Four pairs of genital setae. Three pairs of adanal setae. Two pairs of anal setae, fully developed in this stage.

Legs. Large porous areas on paraxial side of each femur. Porous areas on trochanters not traceable. Setation and solenidia see Table 3.

Remarks

When Marshall and Pugh (2002) described Fortuynia rotunda from African coasts, they gave short information on the legs, e.g. colour and length of segments, and only details about the setae of genu I and II (p. 179, Figure 4 View Figure 4 (b)). Karasawa and Aoki (2005) provided a redescription of F. rotunda based on their specimens found on the Japanese Ryukyu islands but also gave very few information about the legs, e.g. lengths of segments, smoothness of claws. Accordingly, we present herein the setation and solenidia for the legs of this species for the first time in detail and although these formulas may be the same for all Japanese F. rotunda , they may differ in the African F. rotunda . Therefore, the development of leg setation given in the present paper is so far only valid for Japanese F. rotunda .

Fortuynia rotunda View in CoL is characterized by its very rounded notogaster and the juveniles already show a similar body shape with the gastronotic region being considerably broad and rounded. However, this trait should not be considered diagnostic, neither for adults nor for juveniles because it is also present in all developmental stages of F. smiti ( Pfingstl 2015) View in CoL . It is further assumable that other species with similarly rounded body shapes of adults, like Fortuynia maculata View in CoL , show similar rounded larva and nymphs.

Genus Alismobates Luxton, 1992 View in CoL

Common features of juvenile stages

Apheredermous. Colour dark brown. Integument plicate and soft, except for centrodorsal plate. Prodorsum triangular, anterior part finely granular, rostrum rounded. Rostral and lamellar seta short and simple. Minute exobothridial and interlamellar seta e. Sensillum clavate and distally spinose. Bothridium cup-like, laterally opened. Gnathosoma no obvious differences to adult stage. Hysterosoma slightly convex. Hysterosomal cupules not traceable in any stage. Large, stronger sclerotized centrodorsal plate bearing all notogastral setae, except for c 1-3 in all stages and seta h 2 in the larval stage. Centrodorsal plate showing either foveate or reticulate cuticular pattern. In nymphal stages posterior part of this plate showing a median lesser sclerotized and slightly concave conspicuous area without distinct surface pattern resembling an inverted Y. Large folds framing centrodorsal plate completely, showing fine granular surface. Orifice of opisthonotal gland (gla) located in posterior third of lateral folds. Ventral sejugal suture developed as distinct furrow, posterior border medially opened over a short distance. Legs monodactylous with large hook-like claws. Large porous areas on same leg segment as in adults.