Hattena Domrow, 1963,

Masan, Peter, 2017, A revision of the family Ameroseiidae (Acari, Mesostigmata), with some data on Slovak fauna, ZooKeys 704, pp. 1-228: 1

publication ID

http://dx.doi.org/10.3897/zookeys.704.13304

publication LSID

lsid:zoobank.org:pub:111A101E-7405-4C40-8F51-693957A64D97

persistent identifier

http://treatment.plazi.org/id/E203F1C5-B06A-3E55-EBBC-FBAFD718FDF0

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scientific name

Hattena Domrow, 1963
status

 

Genus Hattena Domrow, 1963 

Hattena  Domrow, 1963: 202. Type species: Hattena erosa  Domrow, 1963, by monotypy.

Edbarellus  Manson, 1974: 115. Type species: Edbarellus tonganus  Manson, 1974, by original designation. Synonymy by Halliday (1997).

Diagnosis (adults).

In female, dorsal shield lightly sclerotised, weakly reticulated or unornamented, often irregular in outlines (with 1-3 pairs of lateral incisions), narrowed and not covering whole dorsal surface; dorsal setae short, needle-shaped, similar in length, inserted on dorsal shield (18-25 pairs) and soft integument beside the dorsal shield (3-20 pairs); sometimes dorsolateral and ventrolateral soft integument hypertrichous, with up to 35 setal pairs (non-hypertrichous forms usually with standard number of 28-29 pairs of dorsal setae on dorsal shield and soft integument). Male often with some dorsal shield setae (8-10 pairs) conspicuous, thickened, extremely long and much longer than some of the shortest ones; with slightly expanded dorsal shield capturing some additional pairs of setae inserted on soft integument in female. Female with st1 on weakly sclerotised and inconspicuous sternal shield; setae st2 on sternal shield, small sternal shield fragments or soft integument; setae st3 associated with small endopodal platelets II-III or on soft integument; and st4 on soft integument; sternal shield usually markedly reduced; epigynal shield widely separated from anal shield, with parallel lateral margins, and usually with genital poroids on its surface. Female with anal shield, male with anal shield or ventrianal shield bearing 1-3 pairs of opisthogastric setae. Peritrematal shields or peritremes with anterior ends free and not connected to dorsal shield. Opisthogastric soft integument with five to six pairs of setae (JV3 usually absent in male). Corniculi slender and pointed, with undivided apex. Fixed digit of female chelicera usually edentate, with bifid terminal hook, sometimes with one or two medial denticles; movable digit edentate, with strongly developed terminal hook; pilus dentilis usually not modified into a membranous structure; male with well elongated spermatodactyl directed downward. Palptarsal apotele two-tined. Genu III and tibia III with two anterolateral and one posterolateral setae; tibia IV with two anterolateral and two posterolateral setae. Tarsi I–IV each with empodium and slightly to fully reduced claws. Insemination apparatus with spermathecal ducts unfused.

Remarks.

Generally, the genus Hattena  as a whole shows relatively high diversity in external morphology, and it represents a conglomerate of morphologically heterogeneous species. The following character states were used to separate the Hattena  species into five species groups (see the identification key below): (1) expression of z6 (absent in cometis  group); (2) expression of J3 (present in panopla  group); (3) position of Z5 (on soft integument in panopla  group); (4) setation of soft integument (hypertrichy in cometis  and erosa  groups); (5) form of posterior part of dorsal shield (incised in dalyi  and panopla  groups); (6) sexual dimorphism of dorsal shield setae (markedly developed in cometis  group); (7) position of genital poroids (outside the epigynal shield in erosa  and senaria  groups); (8) sexual dimorphism of anal shield (absent in dalyi  group); (9) character of tritosternal laciniae (fused for most of their length in panopla  group); (10) setation of ventrianal shield in male (with a pair of opisthogastric setae in panopla  group and three pairs in cometis  group); (11) setation of palptrochanter (with only one ventral seta in cometis  and erosa  groups); (12) legs IV in male (spurred in cometis  group).

In this genus, the dorsal shield of males is more expanded than in females, thus bearing up to ten pairs of the setae that in females are inserted on the soft integument. Hattena cometis  , Hattena erosa  and Hattena floricola  have polytrichous soft integument on dorso- and ventrolateral idiosomal surface. Polytrichy has been mentioned in the literature only for females; it was not reported in the descriptions of males of H. cometis  and H. floricola  . Therefore, the polytrichy of male soft integument may be neglected by Domrow (1979) and Halliday (1997), if not considerably reduced or absent.

It is remarkable that there is an additional setal pair of the J-series (J3) expressed on the dorsal shield in Hattena panopla  and Hattena tongana  . This seta is also present in Neocypholaelaps novaehollandiae  .

Hattena clemmys  was not included in the species group classification scheme introduced in this paper because there are several evidences that it is incorrectly placed in this genus: (1) dorsal shield divided into six fragments; (2) sternal shield not strongly reduced but without sternal setae and poroids; (3) setae st5 on soft integument, off the epigynal shield; (4) peritremes strongly abbreviated; (5) movable digit of chelicera with elongate and fringed process; (6) palptarsal apotele three-tined; (7) tarsus of legs I–IV with normally developed claws on empodium. It was placed in Hattena  because of the extent of the dorsal shield and the number of dorsal shield setae, but it probably represents a new genus. Therefore the above mentioned specific characters of H. clemmys  are not included in the diagnosis of Hattena  .

The genus Hattena  now comprises ten species distributed in the tropical areas of the Old and New Worlds (Australia, Ecuador, Kenya, Malaysia, Pacific Ocean Region, Papua New Guinea, Taiwan and Vietnam), in association with flowers and flower-visiting animals (birds, bees and bats). Hattena dalyi  and Hattena tonganus  are known to be phoretically associated with the Euroepean honey bee, Apis mellifera  (from tropics).

Partial keys to the known species of Hattena  may be found only in Halliday (1997), for four species reported from Australia ( cometis  , floricola  , incisa  and panopla  ), and in Faraji and Cornejo (2006), based on six species known up to that time ( cometis  , erosa  , floricola  , incisa  , panopla  and rhizophorae  ). A new and more complete key to the genus is needed to include other species, namely Hattena dalyi  (transferred from Afrocypholaelaps  by Klimov et al. in 2016) and Hattena senaria  comb. n.

Key to species group of Hattena  (adults)

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Mesostigmata

Family

Ameroseiidae

Loc

Hattena Domrow, 1963

Masan, Peter 2017
2017
Loc

Edbarellus

Manson 1974
1974
Loc

Edbarellus tonganus

Manson 1974
1974